How to remove styles from an element using JQuery

JQuery is a very popular JavaScript library. Developers often use JQuery to operate elements in HTML pages. In JQuery, we can use some simple methods to manipulate the style of elements, such as adding styles, removing styles, or editing styles.

This article will focus on how to use JQuery to remove the style of an element.

1. Use the removeClass() method

JQuery provides a removeClss() method to remove one or more styles of an element.

The syntax format is as follows:

$(selector).removeClass(classname,function);

Among them, the parameter classname is the name of the CSS class that needs to be removed. Multiple CSS classes can be removed at the same time, separated by spaces between class names.

The second optional parameter function is the callback function that needs to be executed after removing the CSS class.

For example, we can use the removeClass() method to remove a certain CSS class of an element, as follows:

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

Note: If you need to remove all CSS classes of an element, you can use The removeClass() method does not pass in any parameters:

$("p").removeClass();

2. Use the removeAttr() method

In JQuery, we can also use the removeAttr() method to remove HTML The element's properties. Some HTML elements (such as images) may have inline styles, and this attribute can be removed through the removeAttr() method.

The syntax format is as follows:

$(selector).removeAttr(attributeName);

Among them, the parameter attributeName is the attribute name of the HTML element that needs to be removed.

The following is an example of removing the src attribute of the img element:

$("img").removeAttr("src");

3. Using the css() method

In addition to the above two methods, We can also use the css() method to remove styles from an element. This method allows us to remove the style of an element by setting the CSS property value to an empty string.

The syntax format is as follows:

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

Among them, the parameter property is the name of the CSS property that needs to be removed, and the parameter value should be set to an empty string.

The following is an example of relevant code:

$("p").css("font-size", "");

4. Remove multiple styles of multiple elements

As mentioned earlier, the removeClass() method One or more CSS classes can be removed at the same time. However, if you need to remove multiple styles from multiple elements at the same time, you need to use the each() method.

$("p").each(function(){
    $(this).removeClass("myClass1 myClass2");
});

In the above example, we first select all p elements, and then use the each() method to loop through each p element.

In each loop, we use JQuery again to select the current element, and then use the removeClass() method to remove the two CSS classes.

5. Remove the css class with the specified prefix

If you need to remove the css class with the specified prefix, you can use JQuery's attr() method and indexOf() method To be done.

$("[class^='myPrefix']").removeAttr("class");

In the above example, we first select all elements whose class attribute values ​​start with 'myPrefix', and then use the removeAttr() method to delete their class attributes.

Summary:

The above are several ways to use JQuery to remove the style of elements. Using JQuery can remove the style of elements very quickly and easily, and JQuery also makes web development easier.

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