How to change element id using jQuery?-JS Tutorial-php.cn

How to change element id using jQuery?

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Release： 2023-08-24 09:49:42

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如何使用 jQuery 更改元素 id？

jQuery is one of the JavaScript libraries that is fast, small, and feature-rich. It is used to perform event handling, animation, etc. It is a combination of versatility and scalability. jQuery is used to simplify AJAX calls and DOM manipulation.

Using jQuery, we can make web pages interactive by responding to mouse click events. jQuery includes features such as events, effects, animations, Ajax, JSON parsing, cross-browser support, and extensibility. It is distributed as a single JavaScript file that defines all interfaces such as DOM, events, and Ajax functions.

jQuery consists of two functions, one is a static utility function and the other is an object method.

We can use the attr() function in jQuery to change the value of the element id. You can also use the prop() function.

Let us discuss these two methods of jQuery in detail.

Method 1: Use jQuery attr() method

This is one of the ways to change the element ID. You can use the attr() method to set or return the attributes and values of the selected element. If jQuery attr() returns this attribute, it returns the first value of the matching HTML element. If jQuery attr() sets an attribute value, it sets one or more attributes or pairs of values for a set of matching HTML elements.

grammar

The following is the syntax of the attr() method -

To return the value of the attribute, as shown below -

$(selector).attr(attribute)

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Used to set values and properties

$(selector).attr(attribute, value)

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Use functions to set values and properties as shown below -

$(selector).attr(attribute, function(index, currentvalue))

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In order to set multiple values and properties, use the following -

$(selector).attr({attribute:value, attribute:value,…})

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parameter

Attribute - Specify the attribute name.
value - The specified value of the attribute.
function(index,currentvalue) - Specifies a function that returns the property value to be set. Here, index receives the position of the index within the element within the collection. currentvalue receives the current attribute value of the selected element.

Example

In these examples, we will use jQuery's attr() method to change the element ID.

<html>
<head>
   <script src ="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
   <style>
      #myColor {color: white; background: black; padding:30px; height: 90px; width: 400px;
      }
      #newColor {background: pink; width: 650px; color: white; padding:30px; height: 90px;
      }
   </style>
</head>
<body>
   <div id="myColor"><p style="text-align:center;">Changing the Element ID</p> </div><br>
   <button onclick = "myFuntion()"> Click here </button>
   <script>
      function myFuntion() {
         $("div").attr('id', 'newColor');
      }
   </script>
   </center>
</body>
</html>

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As we have seen in the example, here we have used the attr() method, which is used to change the element ID of an HTML element, which is a jQuery attribute method. We need to import the jQuery library to perform jQuery related functions.

You can use the attr() method to set or return the attributes and values of the selected element. If you use jQuery attr() to return an attribute, the value of the first matching element is returned. These attribute methods change the element ID of the element.

Before we click the button, the background color appears black, and once we click the button, the background color changes to pink.

Method 2: Use prop() method

We can change the element ID of an HTML element using the prop() method. It is used to set or return the attributes and values of the selected HTML element. When using jQuery prop() to return a property value, the value of the first matching element will be returned. If you use the jQuery prop() method to set the value of a property, one or more properties that match a set of value pairs of elements that are a collection.

The following is the syntax of the prop() method -

is used to return the value of the attribute, as follows -

$(selector).prop(property)

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Used to set properties and values

$(selector).prop(property, value)

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Use functions to set properties and values as shown below -

$(selector).prop(property, function(index, currentvalue))

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Set multiple attributes and values as follows -

$(selector).prop(property:value, property:value,…))

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parameter

Attribute - Specify the attribute name
value – Specify attribute value
function(index,currentvalue) – Specifies a function that returns the property value to be set. Here, index receives the index position of the HTML element in the collection. currentvalue receives the attribute value of the currently selected element.

Example

Let's take another example and see how to change the element ID using the prop() method.

<html>
<head>
   <script src ="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
   <style>
      #myColor {color: white; background: black; padding:30px; height: 90px; width: 550px;
      }
      #newColor {background: green; width: 550px; color: white; padding:30px; height: 90px;
      }
   </style>
</head>
<body>
   <div id="myColor"><p style="text-align:center;">Changing the Element ID</p> </div><br>
   <button onclick = "myFuntion()"> Click here </button>
   <script>
      function myFuntion() {
         $("div").prop('id', 'newColor');
      }
   </script>
   </center>
</body>
</html>

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As we saw in the example, here we use the prop() method to change the element ID of the HTML element, which is a jQuery attribute method.

Before we click the button, the background color appears black, and once we click the button, the background color will change to green.

in conclusion

In this article, we demonstrate how to change the element ID with an example. We see two different examples here, in the first example we use attr() method and onclick event to change the element ID after clicking the button. In the second example, we use the prop() method and onClick event to change the element ID after clicking the button.

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