What are some best practices for naming and organizing breakpoints in Chrome DevTools?

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Breakpoints are a powerful tool for debugging your web applications in Chrome DevTools. They allow you to pause the execution of your code at specific lines, conditions, or events, and inspect the state of your variables, functions, and DOM elements. However, if you use breakpoints frequently, you might end up with a cluttered and confusing list of them in the Sources panel. How can you name and organize your breakpoints effectively to make your debugging process easier and faster? Here are some best practices to follow.

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Eran Kinsbruner

Lightrun’s Global Head of Product Marketing and Brand Strategy ?? Best-Selling Author ?? FinOps Certified Practitioner…

1 Use descriptive names

One of the simplest ways to improve your breakpoints management is to give them meaningful names that reflect their purpose, location, or condition. To do this, right-click on a breakpoint in the Sources panel and select Edit breakpoint. A dialog box will appear where you can enter a custom name for your breakpoint. This will help you identify and find your breakpoints quickly, especially if you have many of them in different files or functions.

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Eran Kinsbruner

Lightrun’s Global Head of Product Marketing and Brand Strategy ?? Best-Selling Author ?? FinOps Certified Practitioner ?? Keynote Speaker?? Advisory Board??7 x Top LinkedIn Voice ??Marquis Who's Who Top Executive Listee
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Firstly, choose descriptive names that convey the purpose or context of each breakpoint, making it easier to understand their intended function at a glance. Organize breakpoints logically by grouping them based on related functionalities, modules, or features, which helps maintain a structured and manageable debugging environment. Additionally, consider using conditional breakpoints judiciously to target specific conditions or criteria, reducing unnecessary interruptions in the debugging workflow. Regularly review and refine breakpoint configurations to ensure they align with the evolving codebase and debugging requirements, optimizing the debugging process for improved productivity and effectiveness.

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2 Group related breakpoints

Another way to organize your breakpoints is to group them by categories, such as features, modules, or bugs. To create a group, right-click on an empty space in the Breakpoints section of the Sources panel and select New group. You can then drag and drop your breakpoints into the group and collapse or expand it as needed. You can also rename, enable, disable, or remove the entire group with a single click.

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3 Use conditional and event-based breakpoints

Sometimes, you might want to pause your code only when a certain condition is met or when a specific event occurs. For example, you might want to stop the execution when a variable reaches a certain value, when an error is thrown, or when a user clicks a button. In these cases, you can use conditional and event-based breakpoints instead of regular ones. To set a conditional breakpoint, right-click on a line of code in the Sources panel and select Add conditional breakpoint. A dialog box will appear where you can enter a JavaScript expression that evaluates to true or false. To set an event-based breakpoint, go to the Event Listener Breakpoints section of the Sources panel and select the type and subtype of the event you want to monitor.

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Karl Schmidt

Tech leadership and strategy. Former game studio tech co-founder. Helping businesses with their cross-platform development challenges.
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This is very useful if you are looping over a container with many elements, or if you are in a function that is called many times per second. Instead of repeatedly pressing Continue (risking pressing it by accident when you've finally found the right context!) you can set an expression so it will break only when the conditions are what you are interested in.

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4 Use watchpoints and logpoints

Sometimes you might want to monitor the value of a variable or expression without pausing the execution of your code. In these cases, you can use watchpoints and logpoints instead of breakpoints. Watchpoints are expressions that are evaluated and displayed in the Watch section of the Sources panel every time the debugger pauses. You can add a watchpoint by clicking on the Add watch expression button and entering a JavaScript expression. Logpoints are similar to watchpoints but they print the value of an expression to the Console panel instead of the Watch section. You can add a logpoint by right-clicking on a line of code in the Sources panel and selecting Add logpoint. A dialog box will appear where you can enter a JavaScript expression or a message with placeholders.

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5 Manage your breakpoints across sessions

Finally, you might want to save your breakpoints across different sessions or projects, or share them with other developers. Chrome DevTools allows you to do this by exporting and importing your breakpoints as JSON files. To export your breakpoints, go to the Settings menu (the gear icon) in the Sources panel and click on Export breakpoints. A JSON file will be downloaded to your computer. To import your breakpoints go to the same menu and click on Import breakpoints. A file selector will appear where you can choose the JSON file you want to import. This way, you can keep your breakpoints consistent and portable.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Karl Schmidt

Tech leadership and strategy. Former game studio tech co-founder. Helping businesses with their cross-platform development challenges.
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Keep your breakpoints to a minimum, and remember to clear out older ones. With some debuggers, runtime performance will be impacted as you have more and more breakpoints active.

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What are some best practices for naming and organizing breakpoints in Chrome DevTools?

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1 Use descriptive names

2 Group related breakpoints

3 Use conditional and event-based breakpoints

4 Use watchpoints and logpoints

5 Manage your breakpoints across sessions

6 Here’s what else to consider

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