javascript - chrome中原生的$和$$是什么方法？

Question

chrome中原生的$和$$是什么方法？哪里可以查到文档？
$$返回的是Array
querySelectorAll返回的是NodeList
getElementsByXXX返回的是HTMLCollection

Answer 1

这个快捷方法最开始是来自于Firebug
http://getfirebug.com/wiki/in...

然后chrome的文档在这儿
https://developers.google.com...

---

手动更新一下

$(selector) returns the reference to the first DOM element with the specified CSS selector. This function is an alias for the document.querySelector() function.

$$(selector) returns an array of elements that match the given CSS selector. This command is equivalent to calling document.querySelectorAll().

$x(path) returns an array of DOM elements that match the given XPath expression.

Answer 2

$ == document.getElementById 
$$ == document.querySelectorAll //$$如图

图1:

图2:

图3:

Answer 3

$ document.querySelector
$$ document.querySelectorAll

Answer 4

$ => document.querySelector
$$ => document.querySelectorAll

window.$ = document.querySelector.bind(document)
window.$$ = document.querySelectorAll.bind(document)

Answer 5

Chrome Command Line API Reference 自备梯子
http://getfirebug.com/wiki/in... 免梯子