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In jquery, you can use the change() method to set an event to be triggered when the input value changes. This method is used to set a change event to occur when the value of the element changes. It can also specify a function to run when the event occurs. The syntax is "input element object.change (event trigger code)".
The operating environment of this tutorial: windows10 system, jquery3.2.1 version, Dell G3 computer.
The change event occurs when the value of the element changes (only applicable to form fields).
The change() method triggers a change event, or specifies a function to run when a change event occurs.
Note: When used with select elements, the change event occurs when an option is selected. When used with a text field or text area, the change event occurs when the element loses focus.
Syntax
Trigger the change event of the selected element:
$(selector).change()
Add a function to the change event:
$(selector).change(function)
function Optional. Specifies the function to be run when the change event occurs for the selected element.
The example is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>123</title>
<script src="js/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("input").change(function(){
alert("文本已被修改");
});
});
</script>
</head>
<body>
<input type="text">
<p>在输入框写一些东西，然后按下 enter 键或点击输入框外部。</p>
</body>
</html>Output result:
After modifying the text content:
Recommended related video tutorials: jQuery video tutorial
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