What does 0 double equals dollar zero mean in Chrome Developer Tools

Question

In Google Chrome s developer tools  when I select an element  I see        0 next to the selected element  What does that mean

User · Answer

I will say It  s just shorthand syntax for get reference of html element during debugging time   normaly these kind of task will perform by these method  document getElementById   document getElementsByClassName   document querySelector   so clicking on an html element and getting a reference variable   0  in console is a huge time saving during the day

User · Answer

0 returns the most recently selected element or JavaScript object     1 returns the second most recently selected one  and so on    Refer   Command Line API Reference

User · Answer

The other answers here clearly explained what does it mean I like to explain its use   You can select an element in the elements tab and switch to console tab in chrome  Just type  0 or  1 or whatever number and press enter and the element will be displayed in the console for your use

User · Answer

This is Chrome s hint to tell you that if you type  0 on the console  it will be equivalent to that specific element   Internally  Chrome maintains a stack  where  0 is the selected element   1 is the element that was last selected   2 would be the one that was selected before  1 and so on   Here are some of its applications    Accessing DOM elements from console   0 Accessing their properties from console   0 parentElement Updating their properties from console   1 classList add      Updating CSS elements from console   0 styles backgroundColor  aqua  Triggering CSS events from console   0 click   And doing a lot more complex stuffs  like   0 appendChild document createElement  div      Watch all of this in action     Backing statement  Yes  I agree there are better ways to perform these actions  but this feature can come out handy in certain intricate scenarios  like when a DOM element needs to be clicked but it is not possible to do so from the UI because it is covered by other elements or  for some reason  is not visible on UI at that moment

User · Answer

It s the last selected DOM node index  Chrome assigns an index to each DOM node you select  So  0 will always point to the last node you selected  while  1 will point to the node you selected before that  Think of it like a stack of most recently selected nodes   As an example  consider the following   lt div id  sunday  gt  lt  div gt   lt div id  monday  gt  lt  div gt   lt div id  tuesday  gt  lt  div gt    Now you opened the devtools console and selected  sunday   monday and  tuesday in the mentioned order  you will get ids like    0 - gt   lt div id  tuesday  gt  lt  div gt    1 - gt   lt div id  monday  gt  lt  div gt   2 - gt   lt div id  sunday  gt  lt  div gt    Note  It Might be useful to know that the node is selectable in your scripts  or console   for example one popular use for this is angular element selector  so you can simply pick your node  and run this   angular element  0  scope     Voila you got access to node scope via console

[google-chrome] What does ==$0 (double equals dollar zero) mean in Chrome Developer Tools?

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