How to set and delete attributes in jquery

With the development of Internet technology, front-end development has become more and more important. As one of the most popular front-end frameworks, jQuery has many functions that greatly facilitate front-end development work. This article will introduce in detail the methods of setting and deleting attributes in jQuery, hoping to be helpful to your front-end development work.

1. Set attributes

In jQuery, we can use the attr() method to set attributes. This method has two parameters: attribute name and attribute value.

For example, we have an HTML page structure as follows:

<div id="box"></div>

We can use jQuery's attr() method to set the id attribute of the div element to "box1":

$("#box").attr("id", "box1");

In this way, the id attribute of the div element is set to "box1".

In addition to the id attribute, we can also set some other attributes, such as class attributes, title attributes, etc. For example, we can use the attr() method to set the class attribute of the div element to "red":

$("#box").attr("class", "red");

At this time, the class attribute of the div element is set to "red".

If we want to set multiple properties at the same time, we can use an object to pass these properties. For example, we set the id attribute and class attribute of the div element at the same time:

$("#box").attr({
    "id": "box1",
    "class": "red"
});

In the above code, we use an object to pass the id and class attributes. In this way, the id attribute of the div element is set to "box1" and the class attribute is also set to "red".

2. Delete attributes

Sometimes, we need to delete an attribute of an element. In jQuery, we can use the removeAttr() method to remove an attribute.

For example, we can use the removeAttr() method to delete the id attribute of the div element:

$("#box").removeAttr("id");

In this way, the id attribute of the div element is deleted.

In addition to deleting the id attribute, we can also delete other attributes, such as class attributes, title attributes, etc. For example, we can use the removeAttr() method to delete the class attribute of the div element:

$("#box").removeAttr("class");

At this time, the class attribute of the div element is deleted.

It should be noted that the removeAttr() method can only delete one attribute of an element. If you need to delete multiple attributes, you need to use this method multiple times.

The above are the methods and usage examples of jQuery setting properties and deleting properties. Of course, in actual development, more methods may be needed to handle the attributes of elements. But these basic methods can already meet most of our needs. Hope this article is helpful to you.

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