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How to change input value in javascript

青灯夜游
Release： 2022-01-26 14:36:40
Original
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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");".

How to change input value in javascript

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>
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How to change input value in javascript

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>
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How to change input value in javascript

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