我怎样才能让一个Chrome扩展自动点击一个按钮时，页面加载？ [英] How can I make a Chrome extension automatically click a button when a page loads?

问题描述

我试图创建一个谷歌Chrome扩展程序，presses页面加载一个按钮。我已经能够使用该code触发使用VBScript Internet Explorer的按钮：

I'm trying to create a Google Chrome extension that presses a button on page load. I've been able to trigger the button using VBscript for Internet Explorer by using this code:

IE.Navigate("javascript:changeIframe();")

不过，现在我需要通过一个扩展做谷歌浏览器。但是，按钮没有一个id：

But, now I need to do it in Google Chrome via an extension. However, the button does not have an id:

<input type="button" value="Start!" onclick="javascript:changeIframe();">

和这里就是我试过到目前为止并没有什么似乎工作：

and here's what I've tried so far and nothing seems to work:

window.onload="javascript:changeIframe()";
javascript:changeIframe();
document.getElementById('').click();
document.getElementById('').submit();

似乎。点击和 .submit 不是在谷歌，Chrome的JavaScript的定义？

It seems that .click and .submit is not defined in Google-Chrome's javascript?

奇怪的是，当我使用这个脚本：

The weird thing is that when I use this script:

javascript:changeIframe();

在Chrome的JavaScript控制台，它$ P $自动psses按钮，一切工作正常。但是，当我把同样的剧本在我的js文件这是行不通的。

in Chrome's javascript console, it presses the button automatically and everything works fine. But, when I put the same script in my .js file it does not work.

我只需要知道我有什么可以自动把我的.js文件内以preSS按钮在页面加载。

I just need to know what I have to put inside my .js in order to press the button automatically on page load.

推荐答案

传统的方式做，这是的注入的的code ¹ ：

The traditional way to do this is to inject the code¹:

var scriptNode          = document.createElement ('script');
scriptNode.textContent  = 'changeIframe ();';

document.body.appendChild (scriptNode);

结果
你将通常没有侦听的onload 无论是作为内容脚本将在该点在默认情况下大约火。

You won't normally have to listen for onload either, as content scripts will fire roughly at that point by default.

搜索结果

¹ 扩展JS在一个孤立的世界工作，并与页面的JavaScript没有不在这里需要一些技巧，无法进行互动。

¹ The extension JS operates in an "Isolated World" and cannot interact with the page's javascript without some tricks that are not needed here.

这篇关于我怎样才能让一个Chrome扩展自动点击一个按钮时，页面加载？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！