.removeData()

Categories: Data | Miscellaneous > Data Storage Chinese Translation: .removeData()

.removeData( [name ] )Returns: jQuery

Description: Remove a previously-stored piece of data.

The .removeData() method allows us to remove values that were previously set using .data(). When called with the name of a key, .removeData() deletes that particular value. When called with no arguments, .removeData() removes all values.

Note that .removeData() will only remove data from jQuery's internal .data() cache, and any corresponding data- attributes on the element will not be removed. A later call to data() will therefore re-retrieve the value from the data- attribute. To prevent this, use .removeAttr() alongside .removeData() to remove the data- attribute as well. Prior to jQuery 1.4.3, as data() did not use data- attributes, this was not an issue.

As of jQuery 1.7, when called with an array of keys or a string of space-separated keys, .removeData() deletes the value of each key in that array or string.

Example:

Set a data store for 2 names then remove one of them.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>removeData demo</title>
  <style>
  div {
    margin: 2px;
    color: blue;
  }
  span {
    color: red;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>value1 before creation: <span></span></div>
<div>value1 after creation: <span></span></div>
<div>value1 after removal: <span></span></div>
<div>value2 after removal: <span></span></div>
 
<script>
$( "span:eq(0)" ).text( "" + $( "div" ).data( "test1" ) );
$( "div" ).data( "test1", "VALUE-1" );
$( "div" ).data( "test2", "VALUE-2" );
$( "span:eq(1)" ).text( "" + $( "div").data( "test1" ) );
$( "div" ).removeData( "test1" );
$( "span:eq(2)" ).text( "" + $( "div" ).data( "test1" ) );
$( "span:eq(3)" ).text( "" + $( "div" ).data( "test2" ) );
</script>
 
</body>
</html>

Demo: