In the "Sources" tab of Chrome dev tools, there is a Snippets sub-tab:
What can I use this for?
In short, snippets are a multi-line console, an iterative JS development workflow, and a persistent store for common debugging helpers.
developers.google.com/chrome-developer-tools/docs/authoring-development-workflow#snippets
Some of the use-cases Snippets can help with are:
- Bookmarklets - all of your bookmarklets could be stored as snippets, especially those you may wish to edit.
- Utilities - debugging helpers for interacting with the current page can be stored and debugged. A community-curated list of such utilities is available.
- Debugging - Snippets offer a multi-line console with syntax-highlighting and persistance, making it convenience for debugging code that is more than a one-liner.
- Monkey-patching code - code you wish to patch at runtime can be done through Snippets, although many times you can just live-edit code in the Sources tab.
Lastly, I've personally been collecting a few common snippets that you may include in your arsenal: github.com/paulirish/devtools-addons/wiki/Snippets
To run snippets quickly, now you can do this. Ctrl-Shift-P for the "command palette", then backspace, and use a ! prefix, then type whichever snippet name you want to run.