What's New In DevTools (Chrome 75)

Hello! Here's what's new in Chrome DevTools in Chrome 75.

Meaningful preset values when autocompleting CSS functions

Some CSS properties, like filter, take functions for values. For example, filter: blur(1px) adds a 1-pixel blur to a node. When autocompleting properties like filter, DevTools now populates the property with a meaningful value so that you can preview what kind of change the value will have on the node.

The old autocomplete behavior.
Figure 1. The old autocomplete behavior. DevTools is autocompleting to filter: blur and no change is visible in the viewport.
The new autocomplete behavior.
Figure 2. The new autocomplete behavior. DevTools is autocompleting to filter: blur(1px) and the change is visible in the viewport.

Relevant Chromium issue: #931145

Clear site data from the Command Menu

Press Control+Shift+P or Command+Shift+P (Mac) to open the Command Menu and then run the Clear Site Data command to clear all data related to the page, including: Service workers, localStorage, sessionStorage, IndexedDB, Web SQL, Cookies, Cache, and Application Cache.

The Clear Site Data command.
Figure 3. The Clear Site Data command.

Clearing site data has been available from Application > Clear Storage for a while. The new feature in Chrome 75 is being able to run the command from the Command Menu.

If you don't want to delete all site data, you can control what data gets deleted from Application > Clear Storage.

Application > Clear Storage.
Figure 4. Application > Clear Storage.

Relevant Chromium issue: #942503

View all IndexedDB databases

Previously Application > IndexedDB only allowed you to inspect IndexedDB databases from the main origin. For example, if you had an <iframe> on your page, and that <iframe> was using IndexedDB, you wouldn't be able to see its database(s). As of Chrome 75, DevTools shows IndexedDB databases for all origins.

The old behavior. The page is embedding a demo that uses IndexedDB, but no databases are visible.
Figure 5. The old behavior. The page is embedding a demo that uses IndexedDB, but no databases are visible.
The new behavior. The demo's databases are visible.
Figure 6. The new behavior. The demo's databases are visible.

Relevant Chromium issue: #943770

View a resource's uncompressed size on hover

Suppose that you're inspecting network activity. Your site uses text compression to reduce the transfer size of resources. You want to see how large the page's resources are after the browser uncompresses them. Previously this information was only available when using large request rows. Now you can access this information by hovering over the Size column.

Hovering over the Size column to view a resource's uncompressed size.
Figure 7. Hovering over the Size column to view a resource's uncompressed size.

Relevant Chromium issue: #805429

Inline breakpoints in the breakpoint pane

Suppose that you add a line-of-code breakpoint to the following line of code:

document.querySelector('#dante').addEventListener('click', logWarning);

For a while now DevTools has enabled you to specify when exactly it should pause on a breakpoint like this: at the beginning of the line, before document.querySelector('#dante') is called, or before addEventListener('click', logWarning) is called. If you enable all 3, you're essentially creating 3 breakpoints. Previously the Breakpoints pane did not give you the ability to manage these 3 breakpoints individually. As of Chrome 75 each inline breakpoint gets its own entry in the Breakpoints pane.

The old behavior. There's only one entry in the Breakpoints pane.
Figure 8. The old behavior. There's only 1 entry in the Breakpoints pane.
The new behavior. There's 3 entries in the Breakpoints pane.
Figure 9. The new behavior. There's 3 entries in the Breakpoints pane.

Relevant Chromium issue: #927961

IndexedDB and Cache resource counts

The IndexedDB and Cache panes now indicate the total number of resources in a database or cache.

Total entries in an IndexedDB database.
Figure 10. Total entries in an IndexedDB database.

Relevant Chromium issues: #941197, #930773, #930865

Setting for disabling the detailed inspect tooltip

Chrome 73 introduced detailed tooltips when in Inspect mode.

A detailed tooltip.
Figure 11. A detailed tooltip showing color, font, margin, and contrast.

You can now disable these detailed tooltips from Settings > Preferences > Elements > Show Detailed Inspect Tooltip.

A minimal tooltip.
Figure 12. A minimal tooltip showing only width and height.

Relevant Chromium issue: #948417

Setting for toggling tab indentation in the Sources panel editor

Accessibility testing revealed that there was a tab trap in the Editor. Once a keyboard user tabbed into the Editor, they had no way to tab out of it because the Tab key was used for indentation. To override the default behavior and use Tab to move focus, enable Settings > Preferences > Sources > Enable Tab Moves Focus.

There's been a lot of work recently around making the DevTools UI itself more keyboard navigable. Check out Rob's Navigate Chrome DevTools With Assistive Technology to learn more.

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To discuss the new features and changes in this post, or anything else related to DevTools:

Consider Canary

If you're on Mac or Windows, consider using Chrome Canary as your default development browser. Canary gives you access to the latest DevTools features.

Discover other DevTools features

Below is a list of everything that's been covered in the What's New In DevTools series.

Chrome 75

Chrome 74

Chrome 73

Chrome 72

Chrome 71

Chrome 70

Chrome 68

Chrome 67

Chrome 66

Chrome 65

Chrome 64

Chrome 63

Chrome 62

Chrome 61

Chrome 60

Chrome 59

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