How to handle multiple selections with jquery selector

JQuery is a popular JavaScript library that is widely used in DOM operations, event processing, animation effects, etc. in web development. Among them, the JQuery selector is one of the most commonly used functions in JQuery, and it is also one of the most important functions. You can use the JQuery selector to easily select elements in an HTML page and operate on these elements.

In the actual use of JQuery selectors, sometimes we need to select multiple elements, so how should we deal with it? Next, I will introduce to you several ways to select multiple elements with JQuery selector.

ID Selector

In an HTML page, the ID of an element is unique, and one ID can only correspond to one element. Therefore, using the ID selector can select a unique element. However, in actual development, sometimes multiple elements use the same ID. In this case, other methods need to be used to select multiple elements.

Element selector

The element selector is the most basic selector, which selects all HTML elements of a specified type. For example, to select all p tags, you can use the following code:

$("p")

If you want to select multiple elements, you only need to list multiple element names in the selector:

$("p, span, div")

This will select all p tags, span tags and div tags.

Class selector

The class selector can select elements based on their class attribute value. When using a class selector, you need to add a period before the selector, for example:

$(".myclass")

This way you can select all elements with a class attribute value of "myclass". If you want to select multiple elements with the same class attribute value, you only need to list multiple class names in the selector:

$(".myclass1, .myclass2, .myclass3")

In this way, you can select all class attribute values ​​​​"myclass1" and "myclass2" and "myclass3" elements.

Attribute Selector

Attribute selector can select elements based on their various attribute values. For example, to select all a tags with the href attribute value "http://www.example.com", you can use the following code:

$("a[href='http://www.example.com']")

If you want to select multiple elements with the same attribute value, just Just list multiple attributes in the selector:

$("a[href='http://www.example.com'], img[src='image.jpg']")

This way you can select all a tags with a href attribute value of "http://www.example.com" and a src attribute value of "image. jpg" img tag.

Filter selector

Filter selector can select elements based on their status, position, etc. For example, to select all even-numbered table rows, you can use the following code:

$("tr:even")

If you want to select multiple elements with the same filter conditions, you only need to list multiple filter conditions in the selector:

$("tr:even, td:first-child, input[type='text']")

This way you can select all even-numbered table rows, elements whose first child element is td, and input elements of type text.

The above are several methods for JQuery selector to select multiple elements. In actual use, you can choose the most appropriate method to implement the selection operation of multiple elements according to your needs.

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