Two methods to find the value of the input box: 1. Use val() to directly obtain the content value of the input box (input), the syntax is "$("input").val()"; 2. Use attr() to get the value of the value attribute in the input element, the syntax is "$("input").attr("value")".
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
In HTML, input boxes are defined using input tags. Therefore, finding the value of the input box is to find the value of the input tag.
The input tag value is controlled by the value attribute. Therefore, the last thing you need to ask for is the value of the value attribute of the input tag.
Method 1: Use val() to get the value
The val() method returns or sets the value of the selected element.
The value of the element is set through the value attribute. This method is mostly used for input elements.
If this method does not set parameters, it returns the current value of the selected element.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="js/jquery-1.10.2.min.js"></script>
<script>
$(document).ready(function() {
$("button").click(function() {
console.log($("input").val());
});
});
</script>
</head>
<body>
<input type="text" name="user" value="Hello World" /><br><br>
<button>获取输入框的值</button>
</body>
</html>
Method 2: Use attr() to get the value
Above val The () method is specially used to set or return the content of the input tag, while attr() is used to operate attributes and can return the value of the specified attribute.
Just specify the attribute name whose value needs to be obtained.
$(document).ready(function() {
$("button").click(function() {
console.log($("input").attr("value"));
});
});
[Recommended learning: jQuery video tutorial, web front-end video】
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