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Detailed explanation of HTML5 form properties
- 零到壹度Original
- 2018-03-20 15:47:451456browse
Today this article mainly introduces the form attributes of HTML5 to you in detail. Friends who need it can refer to it. I hope it can help everyone.
Form events:
oninput: Triggered when the user inputs.
oninvalid: Triggered when verification fails.
demo.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
form {
width: 100%;
max-width: 640px;
min-width: 320px;
margin: 0 auto;
font-family: "Microsoft Yahei";
font-size: 20px;
}
input {
display: block;
width: 100%;
height: 30px;
margin: 10px 0;
}
</style>
</head>
<body>
<form action="" >
<fieldset>
<legend>表单事件</legend>
<label>
用户名：<input type="text" name="userName" id="userName">
</label>
<label>
密码：<input type="text" name="pwd" id="pwd">
</label>
<label>
邮箱：<input type="email" name="email" id="email">
</label>
<input type="submit">
</fieldset>
</form>
</body>
<script>
//表单事件: oninput:当用户输入的时候触发。 oninvalid:当验证未通过时触发。
var txt1 = document.getElementById("userName");
var txt2 = document.getElementById("pwd");
var txt3 = document.getElementById("email");
var num = 0;
//oninput:当用户输入的时候触发该事件
txt1.oninput = function() {
num++;
txt2.value = num;
};
//oninvalid:验证不通过时触发该事件
txt3.oninvalid = function() {
this.setCustomValidity("自定义的提示文本"); //设置验证不通过时的提示文本
};
</script>
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