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How to change input value in javascript
- 青灯夜游Original
- 2022-01-26 14:36:4014000browse
Change method: 1. Use the value attribute, the syntax "input object.value = "modified value";"; 2. Use the setAttribute() method, the syntax "input object.setAttribute("value", "Modified value");".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to change the input value in javascript
Method 1: Use the value attribute
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<input id="inp" value="默认值" />
<br /><br />
<button onclick="myFunction()">修改input的值</button>
<script>
function myFunction() {
var input = document.getElementById("inp");
input.value = "修改后的值";
}
</script>
</body>
</html> 
Method 2: Using the setAttribute() method
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<input id="inp" value="默认值" />
<br /><br />
<button onclick="myFunction()">修改input的值</button>
<script>
function myFunction() {
var input = document.getElementById("inp");
input.setAttribute("value","修改后的值");
}
</script>
</body>
</html>
[Related recommendations: javascript Study tutorial】
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