Content: Use js code to modify the default value of the input setting, click the button to modify the default value of the input
code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
function f() {
var v1 = document.getElementById("input1");
v1.value = "123456789"
}
</script>
</head>
<body>
<input type="text" value="aaa" id="input1">
<input type="button" value="改文字" onclick="f()">
</body>
</html>Renderings:
