Greasemonkey 更改表单中单选按钮的值?

2022-01-21 00:00:00 radio-button forms javascript greasemonkey tampermonkey

我正在编写 Greasemonkey/Tampermonkey 脚本，我需要根据单选控件的名称和值打开单选按钮.

I am writing a Greasemonkey/Tampermonkey script and I need to turn on radio buttons depending on the name and value of the radio control.

看起来是这样的:

<input type="radio" name="11" value="XXX" class="radio">
<input type="radio" name="11" value="zzzz" class="radio">

所以我想设置那些名称为 11 且值为 zzzz 的按钮进行检查.

So I want to set those buttons that have name of 11 and a value of zzzz to be checked.

推荐答案

当您使用 jQuery 时，这非常容易.这是一个完整的脚本:

This is super easy when you use jQuery. Here's a complete script:

// ==UserScript==
// @name     _Radio button check
// @include  http://YOUR_SITE/YOUR_PATH/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @grant    GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
    introduced in GM 1.0.   It restores the sandbox.
*/
$("input[name='11'][value='zzzz']").prop ('checked', true);

input[name='11'][value='zzzz'] jQuery 选择器获取所有具有 initial 值 zzzz，但前提是它们位于具有 name="11" 的单选按钮组中.

The input[name='11'][value='zzzz'] jQuery selector gets all <input>s that have the initial value zzzz, but only if they are in the group of radio buttons with name="11".

参考:

  • jQuery
  • jQuery 选择器文档
  • jQuery .prop()

重要:  以上方法适用于大多数页面，但在 AJAX 驱动的页面上，您通常需要使用 AJAX 感知技术.这是因为 Greasemonkey 脚本将在您选中复选框之前运行关心已加载.

Important:   The above works on most pages but, on AJAX-driven pages, you often need to use AJAX-aware techniques. This is because the Greasemonkey script will run before the checkbox you care about is loaded.

解决此问题的一种方法是使用 waitForKeyElements 实用程序.像这样:

One way to deal with this is with the waitForKeyElements utility. Like so:

// ==UserScript==
// @name     _Radio button check
// @include  http://YOUR_SITE/YOUR_PATH/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant    GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
    introduced in GM 1.0.   It restores the sandbox.
*/
waitForKeyElements ("input[name='11'][value='zzzz']", selectRadioButton, true);

function selectRadioButton (jNode) {
    jNode.prop ('checked', true);
}

<小时><小时><小时>

旧答案是最先进的":) 当问题被问到时:

Old answer that was "state of the art" :) back when the question was asked:

// ==UserScript==
// @name            _Radio button check
// @include         http://YOUR_SITE/YOUR_PATH/*
// @require         http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js
// ==/UserScript==

$("input[name='11'][value='zzzz']").attr ("checked", "checked");

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