Sources panel overview
Use the Chrome DevTools Sources panel to:
- View files.
- Set up a Workspace, so that changes you make in DevTools get saved to the code on your file system.
Use the Page pane to view all of the resources that the page has loaded.
Figure 1. The Page pane
How the Page pane is organized:
- The top-level, such as
topin Figure 1, represents an HTML frame. You'll find
topon every page that you visit.
toprepresents the main document frame.
- The second-level, such as
developers.google.comin Figure 1, represents an origin.
- The third-level, fourth-level, and so on, represent directories and resources that were loaded from that origin. For example, in Figure 1 the full path to the resource
Click a file in the Page pane to view its contents in the Editor pane. You can view any type of file. For images, you see a preview of the image.
Figure 2. Viewing the contents of
jquery-bundle.js in the Editor pane
background-color of an element, you'll see that change take effect immediately.
Figure 3. Editing CSS in the Editor pane to change the background color of an element from blue to red
console.log('A') doesn't run, whereas
console.log('B') does. If DevTools re-ran the entire script after making the change, then the text
A would have been logged to the Console.
Create, save, and run Snippets
Snippets are scripts which you can run on any page. Imagine that you repeatedly type out the following code in the Console, in order to insert the jQuery library into a page, so that you can run jQuery commands from the Console:
let script = document.createElement('script');
script.src = 'https://code.jquery.com/jquery-3.2.1.min.js';
script.crossOrigin = 'anonymous';
script.integrity = 'sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=';
Instead, you can save this code in a Snippet and run it with a couple of button clicks, any time you need it. DevTools saves the Snippet to your file system.
Figure 5. A Snippet that inserts the jQuery library into a page
To run a Snippet:
- Open the file via the Snippets pane, and click Run .
- Open the Command Menu, delete the
!, type the name of your Snippet, then press Enter.
See Run Snippets Of Code From Any Page to learn more.
Rather than using
Set up a Workspace
By default, when you edit a file in the Sources panel, those changes are lost when you reload the page. Workspaces enable you to save the changes that you make in DevTools to your file system. Essentially, this lets you use DevTools as your code editor.
See Edit Files With Workspaces to get started.