Looking at it in the console, it looks like $ returns a single DOM element and $... | Hacker News

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		thedufer on March 20, 2014 \| parent \| context \| favorite \| on: Custom Colors of HN Looking at it in the console, it looks like $ returns a single DOM element and $$ returns a NodeList (array-like object) of DOM elements. Not sure what library that is.

reubenmorais on March 20, 2014 | [–]

No library, at least in Firefox it's defined by devtools and only works in the console (provided the page doesn't have it's own $ and $$ globals).

[0] http://dxr.mozilla.org/mozilla-central/source/toolkit/devtoo...

[1] http://dxr.mozilla.org/mozilla-central/source/toolkit/devtoo...

Edit: It works in the WebKit devtools too:

[0] https://mxr.mozilla.org/chromium/source/src/third_party/WebK...

scrabble on March 20, 2014 | [–]

PrototypeJS works that way.

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