What should I do if label cannot be assigned a value in jquery?
Method: 1. Use the text() method, which can set or return the content of the selected element. The syntax is "label element object.text("assigned content")"; 2. Use html() Method, this method can also set the element content, the syntax is "label element object.html ("assigned content")".
The operating environment of this tutorial: windows10 system, jquery3.2.1 version, Dell G3 computer.
Label assignment in jquery
In jquery, by obtaining the label object, you can assign a value to the label using the text() method to change its content.
1. The text() method sets or returns the text content of the selected element.
When this method is used to return content, the text content of all matching elements is returned (HTML tags will be removed).
When this method is used to set content, the content of all matching elements is rewritten.
Return text content:
$(selector).text()
Set text content:
$(selector).text(content)
Use function to set text content:
$(selector).text(function(index,currentcontent))
The example is as follows:
Create a new html file, named test.html, to explain how jquery assigns values to labels. Only after introducing the jquery.min.js library file and successfully loading the file can you use the methods in jquery. Within the p tag, use the label tag to create a line of text, and behind the label tag, use the input tag to create a text input box.
Create a button using the button label, and the button name is "Assign value to label". Bind the onclick click event to the button button. When the button is clicked, the setlabel() function is executed.
In the js tag, create the setlabel() function. Within the function, obtain the object through the name of the label element, and use the text() method to assign a value to the label. For example, assign the value to the label as "username: ".
Open the test.html file in the browser and click the button to see the effect.
Summary:
1. Create a test.html file.
2. In the file, use the label tag to create a line of text and a button button to trigger the execution of the js function.
3. Create a function in the js tag. Within the function, obtain the object through the name of the label element, and use the text() method to assign a value to the label.
In addition to using the text() method, you can also use the html() method to assign a value to the label.
2. Use the html() method to assign a value to the label.
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(){
$("button").click(function(){
$("label").html("Hello world!");
});
});
</script>
</head>
<body>
<button>设置所有label元素的文本内容</button>
<p>这是一个段落。</p>
<label for="male">Male</label>
<p>这是另一个段落。</p>
<label for="female">Female</label>
</body>
</html>Output result:
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