我一直在尝试创建一个扩展，用弹出的数据填充表单，我对使用“背景”和“内容”文件有点困惑，我认为我不需要。 这是我的代码：
表现：
{ "name": "Browser action for Form", "description": "Fill a form with data from the popup", "version": "1.0", "permissions": [ "tabs", "http://*/*", "https://*/*" ], "browser_action": { "default_title": "Form Test", "default_icon": "icon.png", "default_popup": "popup.html" }, "content_scripts": [ { "matches": ["https://the-site-with-a-form.com/*"], "js": ["jquery-3.1.1.min.js", "content.js"] } ], "manifest_version": 2 }popup.html
<!doctype html> <html> <head> <title>Form</title> <script src="popup.js"></script> </head> <body> <form> <textarea id="txtArea"></textarea> <input type="button" id="btn1" value="Run"> </form> </body> </html>popup.js
function click(){ var text = document.getElementById("txtArea") chrome.tabs.sendMessage( tabs[0].id, {from: 'popup', subject: 'DOMInfo',data1: text}); }content.js
chrome.runtime.onMessage.addListener(function (msg, sender, response) { if ((msg.from === 'popup') && (msg.subject === 'DOMInfo')) { //Fill the form with the data of the popup document.getElementById("The textbox from the form").value = msg.data1; } });代码有什么问题？ 谢谢！
I have been trying to create an extension that fills a form with data from a popup, I'm a bit confused regarding the use of "background" and "content" files, I don't think I need one. Here is my code:
Manifest:
{ "name": "Browser action for Form", "description": "Fill a form with data from the popup", "version": "1.0", "permissions": [ "tabs", "http://*/*", "https://*/*" ], "browser_action": { "default_title": "Form Test", "default_icon": "icon.png", "default_popup": "popup.html" }, "content_scripts": [ { "matches": ["https://the-site-with-a-form.com/*"], "js": ["jquery-3.1.1.min.js", "content.js"] } ], "manifest_version": 2 }popup.html
<!doctype html> <html> <head> <title>Form</title> <script src="popup.js"></script> </head> <body> <form> <textarea id="txtArea"></textarea> <input type="button" id="btn1" value="Run"> </form> </body> </html>popup.js
function click(){ var text = document.getElementById("txtArea") chrome.tabs.sendMessage( tabs[0].id, {from: 'popup', subject: 'DOMInfo',data1: text}); }content.js
chrome.runtime.onMessage.addListener(function (msg, sender, response) { if ((msg.from === 'popup') && (msg.subject === 'DOMInfo')) { //Fill the form with the data of the popup document.getElementById("The textbox from the form").value = msg.data1; } });what is wrong in the code? Thanks!
最满意答案
请学习调试扩展弹出窗口 。 如果您这样做，您将看到提供信息的错误消息。
考虑到这一点，弹出代码中的tabs不会来自任何地方 - 因此您的代码会因错误而停止。 很显然，这部分内容被剥离了（很可能是tabs.query调用）。 请注意，如果您的意图是向当前活动的选项卡发送消息，则可以完全跳过sendMessage的第一个参数。
你肯定需要一个内容脚本，因为它是扩展的唯一部分，可以与网页的表单交互。 推荐阅读： 所有类型的Chrome扩展程序如何运作？
Please learn to debug extension popups. If you did, you would see an informative error message.
With that in mind, tabs in your popup code doesn't come from anywhere - so your code there stops with an error. Clearly, that part is ripped out of context (of a tabs.query call, most likely). Note that if your intent is to message the currently active tab, you can just skip the first argument of sendMessage entirely.
You defintiely do need a content script, since it's the only part of an extension that can interact with a webpage's form. Recommended reading: How do all types of Chrome extension scripts work?
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