Document.forms

Baseline Widely available

This feature is well established and works across many devices and browser versions. Itâs been available across browsers since Ð¸ÑÐ½Ñ 2018 Ð³..

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collection = document.forms;

<!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>

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var selectForm = document.forms[index];
var selectFormElement = document.forms[index].elements[index];

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<!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; // Or document.forms['login']
  loginForm.elements.email.placeholder = 'test@example.com';
  loginForm.elements.password.placeholder = 'password';
</script>
</body>
</html>