How to modify css style in jq

JQuery is a very popular JavaScript library that provides a lot of features to simplify JavaScript programming and make it easy to modify CSS styles. In this article, we will explore how to use JQuery to modify CSS styles.

Basic syntax for JQuery to modify CSS:

$(selector).css(property,value);

• selector: the selector of the element to modify the CSS style
• property: the name of the CSS property
• value: The value of the CSS attribute

For example, to set the background color to red, you can use the following code:

$("body").css("background-color", "red");

It should be noted that when using JQuery to modify the CSS style , you can modify multiple styles at the same time, just add multiple attribute names and attribute values ​​after the selector. For example, to change the background color and text color to red at the same time:

$("body").css({
  "background-color": "red",
  "color": "red"
});

In addition to the above basic syntax, JQuery also provides some other methods for modifying CSS styles.

1. Add CSS classes:
   JQuery provides the addClass() method to add CSS classes to elements. For example, add a CSS class named "myClass" to an element:

   $("div").addClass("myClass");

You can also add multiple CSS classes at the same time:

$("div").addClass("class1 class2 class3");

2. Remove CSS classes:
   Similar to the method of adding CSS classes, JQuery provides the removeClass() method to delete the CSS class of an element. For example, delete a CSS class named "myClass":

   $("div").removeClass("myClass");

Similarly, you can delete multiple CSS classes at the same time:

$("div").removeClass("class1 class2 class3");

3. Switch CSS class:
   toggleclass() method can toggle CSS class on the element. If the element does not contain that CSS class, the class is added, otherwise the class is removed. For example, to switch the CSS class named "highlight" on the element:

   $("div").toggleClass("highlight");

Similarly, you can also switch multiple CSS classes at the same time:

$("div").toggleClass("class1 class2 class3");

4. Get CSS style:
   JQuery provides the css() method to get the CSS properties of the element. For example, get the background color of an element:

   $("div").css("background-color");

It should be noted that when getting CSS properties, the returned value does not include the unit. For example, if the element's width is "100px", the return value is "100", not "100px".

In this article, we introduce how to use JQuery to modify CSS styles, including adding CSS classes, deleting CSS classes, switching CSS classes and obtaining CSS properties. These methods can be easily implemented through JQuery, making web development easier and more efficient.

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