The forms
read-only property of the Document
interface returns an HTMLCollection
listing all the <form>
elements contained in the document.
Note: Similarly, you can access a list of a form's component user input elements using the HTMLFormElement.elements
property.
An HTMLCollection
object listing all of the document's forms. Each item in the collection is a HTMLFormElement
representing a single <form>
element.
If the document has no forms, the returned collection is empty, with a length of zero.
<!DOCTYPE html>
<html lang="en">
<head>
<title>document.forms example</title>
</head>
<body>
<form id="robby">
<input type="button" onclick="alert(document.forms[0].id);" value="robby's form" />
</form>
<form id="dave">
<input type="button" onclick="alert(document.forms[1].id);" value="dave's form" />
</form>
<form id="paul">
<input type="button" onclick="alert(document.forms[2].id);" value="paul's form" />
</form>
</body>
</html>
var selectForm = document.forms[index];
var selectFormElement = document.forms[index].elements[index];
<!DOCTYPE html>
<html lang="en">
<head>
<title>document.forms example</title>
</head>
<body>
<form name="login">
<input name="email" type="email">
<input name="password" type="password">
<button type="submit">Log in</button>
</form>
<script>
var loginForm = document.forms.login;
loginForm.elements.email.placeholder = '[email protected]';
loginForm.elements.password.placeholder = 'password';
</script>
</body>
</html>