javascript dollar sign
What is JavaScript dollar sign?
JavaScript dollar sign, also known as jQuery dollar sign, is a shorthand notation used in jQuery to select elements in a HTML document.
The dollar sign symbol, '$', is used to represent the jQuery object. Therefore, whenever you see the '$' in jQuery code, it is referring to the jQuery object.
How to use the JavaScript dollar sign?
In order to use the JavaScript dollar sign, you must include the jQuery library in your HTML document. You can do this by adding the following code in the head section of your HTML document:
<head>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
Once you have included the jQuery library in your HTML document, you can start using the dollar sign notation to select elements.
For example, if you want to select all the paragraphs in your document, you can use the following code:
$( "p" );
This code will return a jQuery object containing all the paragraphs in your document.
Multiple ways to use the JavaScript dollar sign
There are multiple ways to use the JavaScript dollar sign to select elements in your HTML document.
- You can select elements by their tag name:
$( "p" );- You can select elements by their class name:
$( ".my-class" );- You can select elements by their ID:
$( "#my-id" );- You can select elements based on their relationship to other elements:
$( "ul li" );These are just a few examples of how you can use the JavaScript dollar sign to select elements in your HTML document. You can also use other selectors such as attribute selectors and pseudo-selectors.
Conclusion
The JavaScript dollar sign is a shorthand notation used in jQuery to select elements in a HTML document. It is represented by the '$' symbol and refers to the jQuery object. By including the jQuery library in your HTML document, you can start using the dollar sign notation to select elements in your document using various selectors.