Chrome DevTools Autosave

DevTools Autosave on Google I/O 2012 · Intro to DevTools Autosave version 0.x (a bit outdated)

Chrome DevTools let you edit CSS and JavaScript. It even allows you to save it. I think, it’s annoying to choose a folder you want to save to for every file. DevTools Autosave saves the files on every change for you!

How to Install

Chrome DevTools Autosave consists of a Chrome extension and a server. The extension pushes changed files to the server. The server resolves URL of these files and overwrites the old ones with the new ones.

Install the Extension

Install the Server

How to Use

$ autosave
DevTools Autosave is listening on http://127.0.0.1:9104

Open example/index.html locally (using file:// scheme).
Edit some CSS and JS.
That’s it. Files have been saved.

How Does It Work?

Google Chrome has an onResourceContentCommitted event that fires when you edit CSS and JavaScript.

chrome.experimental.devtools.inspectedWindow.onResourceContentCommitted.addListener(function(resource, content) {
    resource.url
    resource.type // 'script', 'stylesheet' or 'document' (happens when you edit inline JS or CSS)
    content // all the content of updated file as a string
})

Nice, isn’t it?

More on Autosave protocol.

FAQ

I’m developing on http://localhost/ (or http://you-name-it/) instead of file://. Can I make Autosave work?

Sure, just add a new route to the extension’s options.

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