What is == $0 in developer tool after the end of e

问题:

This question already has an answer here:

• What does ==$0 (double equals dollar zero) mean in Chrome Developer Tools? 5 answers

I want to know what is the == $0 in developer tool, it is marked by red in the screenshot. I found this == $0 in code of every website in developer tool and want to know what is this?

回答1:

$0 refers to the current selected element in your source.

It means that you can access to this element in the DevTools console by simply typing:

$0

From there, you can do whatever you like with this element, by using Javascript DOM API.

See Chrome DevTools reference

回答2:

I personally am not seeing this, but $0 usually refers to the element currently inspected.

Try it out by right-clicking this comment and choose "Inspect element" in Google Chrome. If you pop over to the console and type out $0, it will select the element in the page and print it out in the console.