safari add developer tools

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How to turn on the develop menu in safari on mac.

The Develop menu lets you view page source in Safari on Mac.

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How to enable the develop menu in safari on mac, how to view page source in safari on mac.

When you right-click on any web page in Safari on Mac, it doesn't reveal the Show Page Source and Inspect Element buttons. To see these, you need to enable the Develop menu---we'll show you how to do that.

Once you've enabled the Develop menu, right-clicking a blank space on any website will reveal the Inspect Element and Show Page Source buttons. These allow you to take a look at the source code of any website, which is useful for things like downloading images from websites and debugging code or finding out what it looks like behind any site (for website designers).

You can easily turn on the Develop menu in Safari by following a couple of steps. Open Safari on your Mac and click the "Safari" button in the menu bar.

Next, select "Preferences." Alternatively, you can use the keyboard shortcut Command+, (comma). This will also open up Safari preferences.

Go to the "Advanced" tab.

Check the box for "Show Develop Menu in Menu Bar."

Now the Develop menu will appear between Bookmarks and Window at the top.

Apart from being able to view the page source, this will allow you to access developer-focused features, such as disabling JavaScript on any website.

Once you've enabled the Develop menu, there are a couple of ways to view the page source in Safari.

Open any website in Safari and right-click the blank space on the page. Now, select "Show Page Source." You can also get to this menu by using the keyboard shortcut Option+Command+u.

If you're looking for images or other media elements from any web page, Safari makes it easy to find these. In the left-hand pane, you will see various folders such as Images, Fonts, etc. Click the "Images" folder to quickly find the photos that you need.

After selecting an image, you can view its details easily by opening up the details sidebar. The button to open this is located at the top-right of the console, just below the gear icon. You can also open this with the shortcut Option+Command+0.

Click "Resource" at the top of the details sidebar to view details, such as the size of the image and its full URL.

You can change the position of the page source console easily, too. There are two buttons at the top-left of this console, right next to the X button. Click the rectangle icon to move the console to a different side within the browser window.

If you'd like to open the page source console in a separate window, you can click the two-rectangles icon. This will detach the console and open it in a separate window.

To check out the code for any specific element on the page, you can right-click that element and select "Inspect Element." This will take you directly to the code for the element that you selected.

Whenever you're done looking at the code, click the X button to close the page source console and return to browsing on Safari. You can also check out how to view a website's page source in Google Chrome  here.

Related: How to View the HTML Source in Google Chrome

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Use the developer tools in the Develop menu in Safari on Mac

If you’re a web developer, the Safari Develop menu provides tools you can use to make sure your website works well with all standards-based web browsers.

If you don’t see the Develop menu in the menu bar , choose Safari > Settings, click Advanced, then select “Show features for web developers.”

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Tom Nelson is an engineer, programmer, network manager, and computer network and systems designer who has written for Other World Computing,and others. Tom is also president of Coyote Moon, Inc., a Macintosh and Windows consulting firm.

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Display the Develop Menu in Safari

Using the develop menu, additional develop menu items, what to know.

• Select Safari > Preferences > Advanced > Show Develop menu in menu bar .
• To use Develop, go to the Safari menu and select Develop , between Bookmarks and Window.
• Most useful Develop options: Open Page With, User Agent, and Empty Caches.

This article explains how to display and use the Develop menu in your Safari (versions 8 through 12) web browser.

Before you can use the Develop menu, you must first make the hidden menu visible. This is an easy task, much easier than revealing the Debug menu that—prior to Safari 4—contained all the commands that are now in the Develop menu. However, don't think that the older Debug menu is no longer relevant; it still exists and contains many useful tools.

Launch Safari from the Dock or the Mac Application folder.

Open Safari's preferences by clicking Safari in the menu bar and selecting Preferences in the drop-down menu.

Click the Advanced tab in the preferences screen.

Select Show Develop menu in menu bar .

Should you ever want to disable the Developer menu, remove the check mark in the Safari > Preferences > Advanced screen.

The Develop menu appears on the Safari menu bar between the Bookmarks and Window menu items. The Develop menu is particularly handy for web developers, but casual users may also find it useful.

Some of the Develop menu items that you're likely to find the most useful include:

• Open Page With : Lets you open the current web page in any browser you have installed on your Mac. If you ever visit a website that doesn't work correctly with Safari, use this command to quickly pop over to the same web page in another browser.
• User Agent : The user agent is a string of text the browser sends to the webserver hosting the web page. If you've ever visited a web page that proclaimed that Safari wasn't supported, this is how the site knew what browser you were using. In most cases, not supported is nonsense, and using this menu item, you can change the user agent to mimic one from a different browser. You may be amazed at how many times a web page that doesn't work suddenly does, just by changing the user agent.
• Empty Caches : Safari keeps a cache of recently accessed sites. The data stored away in this cache includes all the elements of a page, which can be used to quickly render a website when you return to the page. Sometimes the cache can be old or corrupt, causing a web page to display incorrectly. Emptying the cache can fix these issues and can even help speed up Safari .

Most of the remaining menu items are probably more useful to web developers, but if you're interested in how websites are constructed, then the following items may be of interest:

• Show Web Inspector : This opens the Web Inspector at the bottom of the current page. With the Web Inspector, you can examine the elements that went into creating the page.
• Show Page Source : This displays the HTML code of the current page.
• Show Page Resources : This opens the Resource Inspector sidebar in the Web Inspector. It provides an easy way to see which images, scripts, style sheets, and other elements are used on the current page.
• Start Timeline Recording : If you want to see how a web page loads and runs, try the Start Timeline Recording option. This creates a graph showing network activity and how each site element is loaded and used. It makes for an interesting display, but don't forget to turn off the feature by selecting Stop Timeline Recording . Otherwise, you are using your Mac's resources on nonproductive tasks—unless you're a web developer.
• Enter Responsive Design Mode : Another tool for web developers is the built-in simulator that allows you to preview how your web page will look at different screen resolutions or with different devices, such as the iPad or iPhone. Simply load the page you are interested in and select Enter Responsive Design Mode to preview the page. You can try the page rendering using various devices or select a screen resolution to use. When you're done, return to the Develop menu and select Exit Responsive Design Mode .
• Experimental Features : If you're feeling brave, you can try a few of the features that may find their way into future versions of the Safari browser.

With the Develop menu visible, take some time to try out the various menu items. You'll probably end up with a few favorites that you'll use often.

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How to Use Developer Tools on Safari

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If you're a web developer or designer working on Mac, Safari is a browser that you cannot ignore. It's the most used browser on Mac, and it is fully featured with all the necessary tools to help developers design and debug their web pages. Most importantly, Safari has a built-in set of developer tools that are available from the moment you install it, making it convenient and efficient for developers to find, inspect, and modify elements of their webpage. In this article, we'll look at how to use developer tools on Safari, step by step.

Enabling Developer Tools in Safari

Developing websites and applications requires the use of developer tools, which allow you to inspect and modify code, debug errors, and optimize performance. If you're using Safari as your browser, you'll need to enable developer tools before you can start using them. Here's how:

Accessing Safari Preferences

To access Safari Preferences, you have two options. You can either click on Safari from the top menu bar and then click Preferences, or you can use the keyboard shortcut Command + , (comma). Either way, you'll end up in the same place.

Once you're in Safari Preferences, you'll see a variety of tabs at the top of the window. Click on the one that says "Advanced".

Activating the Develop Menu

In the Advanced tab, you'll see a checkbox that says "Show Develop menu in the menu bar". Check this box to enable the Develop menu.

Now that you've enabled the Develop menu, you'll see it in the top menu bar, between Bookmarks and Window. Click on it to see the various options available to you.

Some of the most commonly used options in the Develop menu include:

Inspect Element: This allows you to view and modify the HTML and CSS of a page.

Console: This displays any error messages or other output from the JavaScript console.

Network: This shows you the resources that are being loaded by the page, including images, scripts, and stylesheets.

Debugger: This lets you step through JavaScript code and set breakpoints to help you find and fix errors.

By using these developer tools, you'll be able to create more efficient and effective websites and applications. Happy developing!

Navigating the Developer Tools Interface

Once you have enabled developer tools, you can access them by clicking on the Develop menu and selecting Show Web Inspector. This will open the developer tool interface with several panels:

Elements Panel

The Elements panel is a powerful tool for web developers. It allows you to see the HTML and CSS for the currently selected element on the page. You can use this panel to select and inspect individual elements, modify page elements, and edit styles. You can even add new HTML elements and see how they affect the page layout. The Elements panel is an essential tool for anyone who wants to understand how a web page is constructed.

Network Panel

The Network panel is another important tool for web developers. It shows information about any requests made by the page, including the URL, status, size, and timing. This is useful for debugging performance issues and checking how a page loads. You can use the Network panel to identify slow-loading resources, optimize page speed, and troubleshoot network issues.

Sources Panel

The Sources panel shows you the JavaScript files associated with the page and allows you to debug them. You can set breakpoints, step through code, and inspect variables. This is useful for troubleshooting JavaScript errors and optimizing code performance. You can also use the Sources panel to edit JavaScript code and see how it affects the page behavior.

Timeline Panel

The Timeline panel shows you a timeline of how the page loads performance-wise. It can be used to identify slow-loading resources or laggy scripts. You can see exactly when each resource is loaded and how long it takes. The Timeline panel is a great tool for optimizing page speed and improving user experience.

Console Panel

The Console panel is where you can access the browser's JavaScript console. You can execute JavaScript code in the context of the page and view debug messages and errors. This is useful for troubleshooting JavaScript issues, testing code snippets, and experimenting with new features. You can also use the Console panel to log messages and interact with the page in real-time.

Storage Panel

The Storage panel shows you the various types of storage present on a page, such as cookies, local storage, and session storage. It can be used to debug issues related to handling client-side storage. You can view, edit, and delete storage data, as well as monitor storage usage. The Storage panel is a great tool for understanding how client-side storage works and how to optimize it.

Overall, the developer tools interface is a powerful set of tools that can help you understand and optimize your web pages. Whether you're a beginner or an experienced developer, these tools are essential for building high-quality web applications.

Inspecting and Modifying HTML and CSS

Selecting elements.

Using the Elements panel, you can select an HTML element by clicking on it in the panel or directly on the page. When you select an element, you'll see its HTML and CSS properties on the right-hand side of the panel.

Editing HTML

You can easily edit the HTML of an element, either by double-clicking on the HTML code you want to change or by right-clicking on the HTML code and choosing "Edit as HTML". Then, you can make the necessary changes and save them.

Modifying CSS Styles

Similarly, you can modify CSS styles of an element in the Styles section of the panel. To add a new style, click the "+ New Style Rule" button. To modify an existing style, simply click on it and make the necessary changes.

Adding and Removing Classes

You can also add or remove classes from an element in the Elements panel. To add a class, select the element and add the class name in the "class" field. To remove a class, simply delete its name from the "class" field.

In conclusion, Safari's developer tools are an essential toolset for designers and web developers. They offer a wide range of features that make debugging and designing a webpage accessible and efficient. With this article, you should have a basic understanding of how to use developer tools on Safari. Experiment with the tools and explore their full potential to make your web development experience more productive and enjoyable.

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How To Open Developer Tools On Safari

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Introduction

Opening developer tools in a web browser is a fundamental skill for anyone involved in web development, debugging, or troubleshooting website issues. Developer tools, also known as DevTools, provide a suite of powerful features that allow you to inspect and modify the structure and layout of a web page, analyze network activity, debug JavaScript, and much more. In this article, we will explore how to open developer tools specifically in the Safari web browser.

Safari, known for its sleek interface and robust performance, offers multiple methods to access its developer tools. Whether you prefer using the menu bar, keyboard shortcuts, or the context menu, Safari provides convenient options to suit your workflow. By mastering these methods, you can seamlessly integrate developer tools into your web development process, enhancing your efficiency and productivity.

In the following sections, we will delve into each method, providing step-by-step instructions and tips to ensure a smooth experience. Whether you are a seasoned web developer or just starting your journey, understanding how to open developer tools in Safari is a valuable skill that can empower you to create, debug, and optimize websites with confidence. Let's embark on this exploration and unlock the potential of Safari's developer tools together.

Method 1: Using the Menu Bar

Opening developer tools in Safari using the menu bar is a straightforward and reliable method. This approach is particularly useful for users who prefer navigating through familiar menu options to access essential browser features. Here's how you can effortlessly open developer tools using the menu bar:

Launch Safari : Begin by opening the Safari web browser on your Mac or iOS device. Ensure that you are running the latest version of Safari to access the most advanced developer tools and features.

Navigate to the Menu Bar : Look at the top of your screen for the menu bar. You will find the menu options such as "File," "Edit," "View," "History," "Bookmarks," "Develop," "Window," and "Help."

Access the "Develop" Menu : Click on the "Develop" option in the menu bar. If you don't see the "Develop" menu, you may need to enable it first. To do this, go to "Safari" > "Preferences" > "Advanced" and check the box next to "Show Develop menu in menu bar."

Open Developer Tools : Once you have accessed the "Develop" menu, you will find a list of options, including "Show Web Inspector." Click on "Show Web Inspector," and the developer tools panel will appear, providing you with a comprehensive set of tools to analyze and modify web pages.

Explore the Developer Tools : With the developer tools now open, take a moment to familiarize yourself with the various tabs and features available. You can inspect the HTML and CSS of the web page, analyze network activity, debug JavaScript, and much more.

By utilizing the menu bar to access developer tools in Safari, you can seamlessly integrate this essential feature into your web development workflow. This method provides a convenient and intuitive way to leverage the power of Safari's developer tools, empowering you to create, debug, and optimize websites with precision and efficiency.

Method 2: Using Keyboard Shortcuts

Harnessing the power of keyboard shortcuts is a time-saving and efficient way to access developer tools in Safari. By memorizing and utilizing these shortcuts, you can seamlessly integrate developer tools into your web development workflow, enhancing your productivity and efficiency. Here's how you can effortlessly open developer tools using keyboard shortcuts:

Initiate Keyboard Shortcut : To open the developer tools using a keyboard shortcut, simply press "Option + Command + I" on your Mac keyboard . Alternatively, you can use "Option + Command + C" to open the developer tools and immediately activate the cursor for inspecting elements on the web page.

Access Developer Tools : Upon executing the keyboard shortcut, the developer tools panel will swiftly appear, providing you with a comprehensive set of tools to inspect, debug, and optimize web pages. This rapid access to developer tools streamlines your workflow, allowing you to delve into web page elements and network activity without interrupting your creative momentum.

Navigate with Ease : With the developer tools now open, take a moment to explore the various tabs and features available. You can effortlessly navigate through the Elements, Console, Sources, Network, and other panels using the keyboard or mouse, gaining valuable insights into the structure and behavior of the web page.

By leveraging keyboard shortcuts to access developer tools in Safari, you can seamlessly integrate this essential feature into your web development process. The intuitive and rapid nature of keyboard shortcuts empowers you to swiftly analyze and modify web pages, debug JavaScript, and optimize website performance with precision and speed. Embracing these shortcuts as part of your web development toolkit can elevate your proficiency and effectiveness, enabling you to create exceptional web experiences with ease.

Method 3: Using the Context Menu

Utilizing the context menu to access developer tools in Safari offers a convenient and efficient method, particularly for users who prefer a streamlined approach to web development. By leveraging the context menu, you can seamlessly open the developer tools directly from the web page, eliminating the need to navigate through multiple menu options. Here's a detailed exploration of how you can effortlessly open developer tools using the context menu:

Navigate to the Web Page : Visit the web page that you intend to inspect and analyze using the developer tools. Whether it's your own website, a client's project, or a site you're troubleshooting, the context menu provides a swift pathway to accessing the developer tools.

Right-click on the Web Page : Once you are on the web page, right-click (or control-click) anywhere on the page to reveal the context menu. This menu typically offers a range of options related to the content and functionality of the web page.

Access the "Inspect Element" Option : Within the context menu, look for the option labeled "Inspect Element" or a similar variation. Click on this option, and the developer tools panel will promptly appear, providing you with a comprehensive set of tools to inspect and modify the web page's structure and behavior.

Explore the Developer Tools : With the developer tools now open, take a moment to explore the various tabs and features available. You can inspect and modify the HTML and CSS of the web page, analyze network activity, debug JavaScript, and much more, all within the context of the specific elements you've chosen to inspect.

By leveraging the context menu to access developer tools in Safari, you can seamlessly integrate this essential feature into your web development workflow. This method offers a direct and intuitive pathway to swiftly analyze and modify web pages, empowering you to gain valuable insights and optimize website performance with precision and ease. Embracing the context menu as part of your web development toolkit can elevate your proficiency and effectiveness, enabling you to create exceptional web experiences with seamless accessibility to developer tools.

In conclusion, mastering the art of opening developer tools in Safari is a valuable skill that can significantly enhance your web development capabilities. By exploring the various methods to access developer tools, including using the menu bar, keyboard shortcuts, and the context menu, you can seamlessly integrate this essential feature into your workflow, empowering you to create, debug, and optimize websites with precision and efficiency.

Whether you prefer the familiarity of navigating through the menu bar, the rapid accessibility of keyboard shortcuts, or the streamlined efficiency of the context menu, Safari offers versatile options to suit your preferences and workflow. Each method provides a seamless pathway to unlock the powerful suite of developer tools, enabling you to inspect and modify web pages, analyze network activity, debug JavaScript, and much more.

By leveraging the menu bar, users can rely on the intuitive navigation to access developer tools, seamlessly integrating this essential feature into their web development process. The convenience of using familiar menu options ensures a smooth transition into the world of web page inspection and modification.

Embracing keyboard shortcuts as part of your web development toolkit can elevate your proficiency and effectiveness, enabling you to swiftly analyze and modify web pages, debug JavaScript, and optimize website performance with precision and speed. The rapid access to developer tools streamlines your workflow, allowing you to delve into web page elements and network activity without interrupting your creative momentum.

Utilizing the context menu to access developer tools offers a direct and intuitive pathway to swiftly analyze and modify web pages, empowering you to gain valuable insights and optimize website performance with precision and ease. This method eliminates the need to navigate through multiple menu options, providing a streamlined approach to web development.

In essence, understanding how to open developer tools in Safari is a foundational skill that can empower you to create exceptional web experiences. By seamlessly integrating developer tools into your web development process, you gain the ability to inspect, debug, and optimize websites with confidence, ultimately enhancing the quality and performance of your web projects. Embrace the versatility of Safari's developer tools and unlock the potential to elevate your web development capabilities.

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How to show Safari’s Develop menu and Web Inspector

( 7 Articles )

April 25, 2022

If you’re a web developer, then there might be cases where you want to debug and improve your website (or web app) on Safari (which takes approximately 19% of browser market share worldwide).

The steps below show you how to show Safari’s Develop menu and its web inspector tool.

1. Click on Safari on the top menu bar, then select Preferences…

2. Select the Advanced tab then check the checkbox labeled with “Show Develop menu in menu bar”:

3. Now the Develop menu appears. Open a website, click on Develop , and select Show Web Inspector (or Connect Web Inspector ) from the drop-down menu:

You can also use shortcuts: Command + Option + I .

Here’re Safari Dev Tools for web developers:

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Safari Dev Tools: The Complete 2023 Guide

Introduction to safari developer tools.

Safari is Apple's proprietary web browser that comes pre-installed on all Mac and iOS devices. Its integrated developer tools provide everything web developers need to build, debug and optimize websites for Apple's ecosystem.

In this comprehensive tutorial, we'll cover key capabilities of Safari's dev tools including:

• The Web Inspector for inspecting page structure and CSS
• The Debugger for stepping through JavaScript code
• The Resources panel for auditing page assets
• The Audits panel for testing web standards compliance
• Device Mode for simulating mobile screens
• Advanced debugging features like conditional breakpoints
• Network throttling to simulate real-world conditions
• Experimental features for early access

By the end, you'll have master expertise using Safari dev tools to squash bugs faster, improve site performance, and deliver exceptional web experiences across Apple devices. You'll also discover resources like DevHunt to continue exploring the latest Safari developer tools.

A Brief History of Safari

Safari originated within Apple in 2003, based on the open source KHTML rendering engine. It was first released for Mac OS X Panther and quickly became Apple's default browser.

In 2007, Apple launched the first Windows version of Safari to expand its userbase. That same year, Safari made its mobile debut on the first iPhone.

Over the years, Safari has gone through many major version updates adding new features and support for emerging web standards. It remains the pre-installed browser on all Apple operating systems and devices including Macs, iPhones and iPads.

Why Learn Safari Developer Tools?

Here are some key reasons web developers should learn Safari dev tools:

• Pre-installed on all Mac and iOS devices, used by millions globally
• Allows direct debugging on iOS devices
• Can emulate mobile devices in desktop browser
• Essential for targeting Apple's ecosystem
• Identify optimizations for Safari to improve site experience
• Learn how your sites perform on Safari and make improvements
• Fix rendering issues specific to WebKit browser engine
• Utilize experimental features to build cutting-edge websites
• Discover new Safari dev tools on platforms like DevHunt

With Safari holding significant browser market share, especially in the mobile space, having expertise in its developer tools is vital for crafting high-quality cross-browser experiences.

Core Safari Developer Tools

Now let's dive into the core developer tools available within Safari on both desktop and mobile.

The Web Inspector

The Web Inspector is the main hub for visually inspecting and modifying a web page. Key functions include:

• View and edit the live DOM tree
• Inspect and modify CSS styles
• Audit accessibility information
• Analyze network requests and performance
• Identify layout issues or style problems
• Live edit code changes right in the browser

For front-end developers, the Inspector is indispensable for debugging HTML, CSS and accessibility issues. You can instantly see how changes to markup and styles affect rendering.

The Debugger

Safari's JavaScript Debugger allows pausing code execution to step through scripts line-by-line. You can:

• Set breakpoints to isolate issues
• Inspect stack traces and variable scopes
• Profile memory usage and CPU utilization
• Emulate device throttling conditions
• Blackbox third-party scripts

The Debugger equips you to tackle even the most complex JavaScript bugs. From tracking down logic errors to profiling performance, it's an essential tool for front-end logic and optimization.

The Resources Panel

This panel displays all resources loaded by the page like scripts, stylesheets, fonts, images and media. For each resource you can:

• View request URLs, status codes and timings
• Filter by type, folder location or domain
• Check dependencies and redundancy
• Audit performance and bottlenecks
• Download resources to your machine

Knowing exactly what resources a page loads is invaluable for optimizing performance. The Resources panel helps you eliminate unnecessary requests and prioritize critical assets.

Storage Inspector

The Storage Inspector lets you view and edit browser storage like cookies, LocalStorage, SessionStorage and IndexedDB. You can:

• Add, modify or delete stored keys and values
• Export storage data as JSON
• Emulate different browser states for testing
• Clear storage entirely to test initial experience

Being able to inspect persistence mechanisms is vital for debugging issues related to state management in modern web apps.

The Audits Panel

Safari's Audits panel runs diagnostics on pages to surface optimization opportunities and standards compliance issues. Audits include:

• Performance analysis and scoring
• Accessibility checks following WCAG guidelines
• Best practices for progressive web apps
• SEO enhancements
• Modern web platform usage

Running audits before launching any website can help you catch critical problems early and compare against industry benchmarks.

Advanced Safari Developer Tools

Beyond the basics, Safari offers powerful advanced tools for seasoned developers.

Device Mode

Device Mode accurately emulates mobile screens and conditions right in desktop Safari:

• Simulate precise device dimensions and resolution
• Throttle CPU and network to mimic real devices
• Essential for building mobile-friendly, responsive sites
• Test touch events and gestures during development

With Device Mode, you can build fully optimized mobile experiences without constantly switching devices.

Advanced Debugging

Safari provides next-level JavaScript debugging capabilities:

• Set conditional breakpoints using expressions
• Group breakpoints for easy management
• Step through async code with async stack traces
• Profile memory heap allocations over time
• Blackbox scripts to hide library code
• Break on caught or uncaught exceptions

These advanced features help you tackle difficult bugs in even the most complex single-page apps and frameworks like Vue.js.

Network Throttling

Network Throttling allows simulating slow network connections, like 3G and LTE. You can:

• Rate limit bandwidth and latency
• Identify assets blocking page load
• Debug loading behavior in emerging markets
• Optimize performance for offline/low-bandwidth
• Throttle cache usage and response compression

Testing how your site performs under real-world network conditions is crucial to providing good user experiences for all.

Experimental Features

Safari lets developers try out experimental tools before they are formally released:

• Get early access to new capabilities
• Provide feedback to help shape future features
• Use at your own risk as they are still in development
• Currently includes CSS Flexbox debugging tools

Tapping into experimental features allows you to build cutting-edge experiences and directly influence the browser platform's evolution.

Debugging JavaScript Issues

Now let's explore strategies for debugging JavaScript using Safari's advanced capabilities.

Breakpoint Usage

Effective breakpoint usage is key for isolating issues:

• Set breakpoints directly within the source code
• Organize breakpoints into groups by context
• Use conditional breakpoints to pause on specific criteria
• Disable breakpoints without deleting to toggle behavior
• Manage breakpoints efficiently even in complex codebases

Mastering breakpoints gives you precise control over pausing execution to inspect logic flow and data.

Scope Inspection

Understanding scope is vital for tracking down variable issues:

• Inspect variable values in different call frames
• Detect scope pollution across closures and modules
• Ensure code executes in the intended lexical scope
• Fix bugs caused by accessing stale variable references
• Avoid global namespace pollution

With Safari's scoping tools, you can confidently debug even complex nested closures and callback contexts.

Async Debugging

Safari provides multiple approaches for debugging asynchronous code:

• Step through promise resolutions and rejections
• Inspect async operation call stacks and task queues
• Profile async code performance with CPU profiler
• Set breakpoints within async callbacks and timers
• Visually trace async code flows

Smooth async debugging helps you tackle race conditions, timing issues, and callback hell.

Error Handling

The key to debugging runtime errors is Safari's break on exception feature:

• Break on any caught or uncaught exceptions
• Inspect error call stacks to trace where issues originate
• Log values with console.log() to debug logic flow
• Validate edge cases and fix crashes
• Handle errors gracefully to improve user experience

With robust error handling, you can isolate bugs quicker and build more resilient apps.

Optimizing Page Speed

Next let's explore some common techniques for optimizing page speed using Safari developer tools.

Image Optimization

Safari provides multiple ways to optimize images:

• Audit image sizes and formats using the Resources panel
• Compress and resize images as needed
• Lazy load offscreen images to improve TTI
• Serve next-gen formats like WebP to Safari users
• Remove unnecessary decorative images

With Safari's insight into image resources, you can significantly cut page weight and load times.

Script Loading

Optimizing script loading is key for performance:

• Minimize parser-blocking JavaScript
• Load non-critical scripts asynchronously
• Dynamically create and load scripts
• Code split bundles into logical chunks
• Tree shake and minify code to reduce payload

Safari shows you exactly how scripts impact loading behavior so you can optimize delivery.

Caching Assets

Effective caching can boost repeat visit performance:

• Set optimal cache lifetimes for static assets
• Cache assets locally using service workers
• Version assets linked to app release cycles
• Avoid cache-busting query strings
• Maximize cache reuse for returning users

The Resources panel helps you dial in caching for faster loads without staleness.

Layout Thrashing

Diagnosing layout thrashing is key for smooth UX:

• Identify forced synchronous layouts
• Defer non-critical DOM updates with requestAnimationFrame()
• Avoid reading styles after writes during rendering
• Batch DOM reads/writes together
• Profile with Debugger to pinpoint problems

With Safari's performance tools, you can isolate and fix sources of jank and lag.

Wrap Up and Key Takeaways

Safari developer tools provide everything needed to build high-quality websites targeting Apple's ecosystem.

Key highlights include:

• Debugging directly on iOS devices with Web Inspector
• Stepping through JavaScript with advanced Debugger features
• Auditing pages for standards compliance
• Simulating mobile devices and networks during development
• Optimizing performance using Network Throttling
• Trying out experimental capabilities early
• Discovering new Safari dev tools on platforms like DevHunt

Learning Safari developer tools allows you to find and fix cross-browser issues faster. You can optimize sites specifically for Safari and deliver stellar experiences to millions of Apple users worldwide.

With a comprehensive understanding of Safari's robust toolset, you can confidently build, debug and enhance modern progressive web apps. Safari developer tools help web developers succeed across platforms.

Related posts

• Safari Developer Tools: The Complete Guide for Web Developers
• Discover the Top Web Developer Tools for 2023
• Unlock Safari's Powerful Developer Tools
• Dev Tools iOS Developers Need in 2023

View, manage, and install add-ins for Excel, PowerPoint, and Word

When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

Note:  This article only applies to Microsoft 365 applications running on Windows.

View installed add-ins

You can directly install add-ins from this page or select  More Add-ins  to explore.

In the Office Add-ins dialog, select  My Add-ins  tab.

Select an add-in you want to view the details for and right-click to select  Add-in details  option.

Click a heading below for more information .  

Add-in categories explained

Active Application Add-ins      Add-ins registered and currently running on your Microsoft 365 program.

Inactive Application Add-ins      These are present on your computer but not currently loaded. For example, XML schemas are active when the document that refers to them is open. Another example is the COM add-in: if a COM add-in is selected, the add-in is active. If the check box is cleared, the add-in is inactive.

Document Related Add-ins      Template files referred to by open documents.

Disabled Application Add-ins     These add-ins are automatically disabled because they are causing Microsoft 365 programs to crash.

Add-in      The title of the add-in.

Publisher      The software developer or organization responsible for creating the add-in.

Compatibility      Look here for any compatibility issues.

Location      This file path indicates where the add-in is installed on your computer.

Description This text explains the add-in function.

Note:  Microsoft Outlook has one add-in option in the Trust Center: Apply macro security settings to installed add-ins . InfoPath has no security settings for add-ins.

Permanently disable or remove an add-in

To disable or remove an add-in follow these steps:

Select  File > Get Add-ins . Alternatively, you can select  Home > Add-ins .

In the Office Add-ins dialog, select  My Add-ins  tab.

Select an add-in you want to remove and right click to select  Remove  option.

View or change add-in settings

You can see and change add-in settings in the Trust Center, descriptions of which are in the following section. Add-in security settings may have been determined by your organization so not all options may be available to change.

Select  File  >  Get Add-ins .

Select  More Add-ins > Manage My Add-ins.

Select  Trust Center  >  Trust Center Settings  >  Add-ins.

Check or uncheck the boxes you want.

Add-in settings explained

Require Application Add-ins to be signed by Trusted Publisher      Check this box to have the Trust Center check that the add-in uses a publisher's trusted signature. If the publisher's signature hasn’t been trusted, the Microsoft 365 program doesn’t load the add-in, and the Trust Bar displays a notification that the add-in has been disabled.

Disable notification for unsigned add-ins (code will remain disabled)      When you check the Require Application Extensions to be signed by Trusted Publisher box, this option is no longer grayed out. Add-ins signed by a trusted publisher are enabled, but unsigned add-ins are disabled.

Disable all Application Add-ins (may impair functionality)      Check this box if you don't trust any add-ins. All add-ins are disabled without any notification, and the other add-in boxes are grayed out.

Note:  This setting takes effect after you exit and restart your Microsoft 365 program.

While working with add-ins, you may need to learn more about digital signatures and certificates , which authenticate an add-in, and trusted publishers , the software developers who often create add-ins.

Manage and install add-ins

Use the following instruction to manage and install add-ins.

To install a new add-in:

You can directly install popular add-ins on the page or go to More Add-ins  to explore. 

Select the add-in and select  Add . Or browse by selecting  Store  tab in the Office add-in dialog to find other add-ins to install and select Add for that add-in.

To manage your add-ins:

Select  File > Get Add-ins and from the bottom, select More Add-ins.  Or select  Home  >  Add-ins > More add-ins.

In the Office dialog, select My Add-ins tab. If you are not able to see your add-ins, select  Refresh to reload your add-ins.

Select  Manage My Add-in  to manage and select  Upload to browse and add an add-in from your device.

How to cancel a purchased add-in

If you've subscribed to an add-in through the Microsoft 365 Store that you don't want to continue, you can cancel that subscription.

Open the Microsoft 365 application and go to the Home  tab of the ribbon.

Select  Add-ins  and then select  More Add-ins > My Add-ins tab   to view your existing add-ins.

Select the app you want to cancel and select  Manage My Add-ins .

Under the Payment and Billing section choose Cancel Subscription .

Select  OK and then Continue .

Once that's complete you should see a message that says "You have cancelled your app subscription" in the comments field of your apps list.

Why is my add-in crashing?

Some add-ins might not be compatible with your organization's IT department policies. If that is the case with add-ins recently installed on your Microsoft 365 program, Data Execution Prevention (DEP) will disable the add-in and the program might crash.

Learn more about DEP

Get a Microsoft 365 Add-in for Outlook

Get a Microsoft 365 Add-in for Project

Taking linked notes

If you're looking for Help on linking notes in OneNote to a Word or PowerPoint document, see Take linked notes .

Excel Windows Add-ins

If you're looking for Help on specific Excel Add-ins, such as Solver or Inquire, see Help for Excel for Windows add-ins .

If you're looking for additional help with Excel add-ins using the COM Add-ins dialog box, see Add or remove add-ins in Excel .

Get a Microsoft 365 Add-in for Excel

Need more help?

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Meet Safari Web Extensions on iOS

Safari extensions

Enhance and customize the web browsing experience on iPhone, iPad, and Mac with Safari extensions. Using powerful native APIs and frameworks, as well as familiar web technologies such as HTML, CSS, and JavaScript, you can easily create Safari extensions in Xcode and distribute them on the App Store in the Extensions category. Xcode 12 and later supports the popular WebExtension API and includes a porting tool to make it easy to bring your extensions to Safari.

Blocking content

Give users the ability to block certain content types on Safari iOS, iPadOS, and macOS. Built with Xcode, these app extensions are designed for speed and don’t slow down browsing. And because extensions never see what webpages users visit, user data is protected.

Learn about content blockers

Web extensions

Extend the web-browsing experience by allowing Safari to read and modify web page content. Now supported in iOS 15 and iPadOS 15, Safari web extensions are available on all Apple devices that support Safari. These extensions are built with Xcode and can communicate and share data with native apps — so you can integrate app content into Safari or send web data back to your app to create a unified experience.

Learn about Safari web extensions

Distributing and managing extensions

The Extensions category on the App Store for iPhone, iPad, and Mac showcases Safari extensions, with editorial spotlights and top charts to help people discover and download great extensions from the developer community. When your Safari extension is ready to be released, upload it to App Store Connect for distribution on the App Store. Apple reviews all extensions and updates to ensure they work reliably. Before submitting for review, make sure to read the guidelines for extensions .

Get started with App Store Connect

Converting extensions from other browsers

Web extensions that work in browsers other than Safari can be converted to support Safari on Apple platforms. Run the command-line web extension converter to create an Xcode project configured with a macOS app and/or iOS or iPadOS app that includes an extension that can be enabled in Safari.

Learn about converting a web extension for Safari

Upgrading macOS Safari web extensions to support iOS and iPadOS

It's easy to upgrade an existing macOS Safari web extension to also support iOS and iPadOS. Simply rerun your project through the command-line web extension converter tool with the --rebuild-project option. This will create a new Xcode project based on your existing project that includes extensions for these platforms.