此运算符（= $）在Javascript中是什么意思？

Question

I have seen code online using this operator and I don't know what it's supposed to mean:

var div1  =$  ('#div1');
var div2  =$  ('#div2');
var div3  =$  ('#div3');

It's returning me the element with the corresponding IDs, but why? How does it work and is it native?

Answer 1

It means:

var div1 = $('#div1');

Just poor formatting by whoever wrote that.

Answer 2

Looks like the spacing is just not good. It is actually

var div = $('#div1') 

a jQuery selector for element with id div1

Answer 3

It is not correct formatting. Мore correctly write like this:

var div1 = $('#div1')

The jQuery library exposes its methods and properties via two properties of the window object called jQuery and $ . $ is simply an alias for jQuery and it's often employed because it's shorter and faster to write.

In plain JS you can write:

var div1 = document.getElementById("div1");

Answer 4

Its basically selecting the divs like $('#div1'), $('#div1') so on, just formatted wrongly. That is why you are receiving element with the corresponding IDs

Answer 5

This is id of one of the div element in HTML code, Which can be used to define actions on that div element like:

 var div1 = $('#div1'); div1.show(); div1.empty();