How to highlight jquery

In web development, highlighting is a very commonly used effect, which allows users to more intuitively see the importance or status of certain elements on the page. In front-end development, jQuery, as a very powerful JavaScript library, can help us quickly achieve highlighting effects.

This article will introduce how to use jQuery to achieve highlighting effects, including the following:

1. jQuery selector
2. jQuery style operation
3. jQuery Highlighting implementation

jQuery selector

In jQuery, selectors are a very important concept. We can use selectors to get certain elements in the web page and then select them Perform operations. jQuery selectors usually use the syntax of CSS selectors. Here are some common jQuery selectors:

• ID selector: Use the "#" symbol to select the element with the specified ID.

  $("#elementId")

• Class selector: Use the "." symbol to select elements with a specified class name.

  $(".className")

• Tag selector: directly use the tag name to select the element of the specified tag.

  $("div")

• Attribute selector: Select elements with specified attributes or attribute values.

  $("[attribute=value]")

• Child element selector: Select child elements under the specified parent element.

  $("parentElement > childElement")

The above are just some basic selectors, and there are also some advanced selectors, such as pseudo-class selectors, form selectors, etc., which will not be listed one by one.

jQuery style operation

In jQuery, we can use the css() function to modify the style of the element, as shown below:

$("#elementId").css("color", "red");

The first part of the css() function The first parameter represents the style attribute to be modified, and the second parameter represents the attribute value to be modified. We can also pass an object containing multiple style attributes and their values, as shown below:

$("#elementId").css({
    "color": "red",
    "background-color": "yellow"
});

jQuery Highlighting Implementation

With the previous basic knowledge, we can start to learn how to Use jQuery to achieve the highlighting effect. The following is a simple example:

HTML code:

<div id="highlightDiv">Hello World!</div>
<button id="highlightBtn">Highlight</button>

JavaScript code:

$(document).ready(function() {
    $("#highlightBtn").click(function() {
        $("#highlightDiv").css("background-color", "yellow");
    });
});

The above code realizes that after clicking the button, the background color of the specified div element will change. is yellow. The key to achieving the highlight effect is to change the background color of the specified element to a bright color, common ones include yellow, light gray, light blue, etc.

In addition to changing the background color, we can also change other style attributes, such as border color, text color, etc., to achieve better highlighting effects.

Of course, the above highlighting effect is based on a single element. We can also achieve highlighting effects for multiple elements in the web page, as long as we use more flexible jQuery selectors and style operations.

In short, using jQuery to achieve highlighting effects is a very simple matter. You only need to master some basic knowledge of selectors and style operations to easily achieve various highlighting effects.

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