Document.forms

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

forms 返回当前文档中的 <form>元素的一个集合 (一个 HTMLCollection)。

语法

let collection = document.forms;

例子：获取表单信息

html

<html>
  <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>

例子：获取表单内的元素

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

规范

forms DOM Level 2 HTML: forms

参见

DOM:form