Form in HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form action="" name="hello" id="login">
<input type="text" placeholder="demo@email.com"
<button>提交</button>
</form>
</body>
</html>Utilizedocument.formsGet all forms of the current page
##document.forms[0]Get the first form of the current page A form
document.forms['hello']Get the form through the name attribute of the form
document.forms['login']Get the form through the id attribute of the form
<script>
//form
console.log(document.forms);
// <form action="" name="hello" id="login">
console.log(document.forms[0]);
console.log(document.forms['hello']);
console.log(document.forms['login']);
console.log(document.forms.item(0));
console.log(document.forms.item("hello"));
console.log(document.forms.item("login"));
//推荐 id
console.log(document.forms.namedItem("login"));
console.log(document.forms.hello);
console.log(document.forms.login);
</script>The above is the detailed content of How to get form elements in JavaScript. For more information, please follow other related articles on the PHP Chinese website!
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