在Chrome扩展中传递的基本消息似乎失败 [英] Basic message passing in chrome extension seems to fail
问题描述
我已阅读文档，这应该是基本的，但我似乎无法让这些警报出现。有什么不对？
popup.html
< html>
< head>
< script>
function finder（）{
chrome.tabs.getSelected（null，function（tab）{
chrome.tabs.sendMessage（tab.id，{type：feature}，function（响应）{
console.log（response.farewell）;
}）;
}）;
}
< / script>
< style>
p {
border：1px纯黑色;
width：200px;
font-size：10px;
}
< / style>
< / head>
< body>
< p>< a id =jira>点击以填充FE描述< / a>< / p>
< script>
var jira = document.getElementById（'jira'）;
jira.addEventListener（'click'，finder，false）;
< / script>
< / body>
< / html>
内容脚本：
chrome.extension.onMessage.addListener（function（request，sender，sendResponse）{
alert（'sreceived'）;
if（request.type ==feature）{
alert（'score！'）;
}
}）;
嵌入式JavaScript不会被执行。此限制禁止内联块和内联事件处理程序（例如< button onclick =...> ）。
通过以上几行，很明显popup.html违反了限制，可以按照以下方式解决：
删除所有<$ c $在 popup.html 中标记c>< script> 标签并将原始代码移动到 popup.js
< html>
< head>
< script src =popup.js>< / script> <！ - 添加了这一行 - >
< style>
p {
border：1px纯黑色;
width：200px;
font-size：10px;
}
< / style>
< / head>
< body>
< p>< a id =jira>点击以填充FE描述< / a>< / p>
< / body>
< / html>
我没有将字符串复制粘贴到 popup.js 。这些是我所做的更改：
-
chrome.tabs.getSelected（）已弃用chrome.tabs.query（），因此我更新了chrome.tabs.getSelected（null，function（tab）{}）; - 注释
console.log（response.farewell）;，因为内容脚本中没有响应处理程序。
final popup.js
function finder（）{
chrome.tabs.query（{
status：complete，
currentWindow：true，
active：true
}，function（tabs） {
chrome.tabs.sendMessage（tabs [0] .id，{
type：feature
}，function（response）{
//console.log(response.farewell）;
}）;
}）;
}
document.addEventListener（'DOMContentLoaded'，= function（）{
document.getElementById（'jira'）。onclick = finder;
}）;
注意manifest.json p>
- 确保权限可用为
permissions：[tabs，< all_urls>] code> -
内容脚本的权限也
content_scripts ：[
{
matches：[< all_urls>]，
js：[content.js]
}
]
最终manifest.json 您的内容脚本没问题，所以我没有更改它。 输出： 让我知道您是否需要更多信息。 I have read the documentation and this should be basic but I can't seem to get those alerts to appear. What's wrong? popup.html Content Script:
Inline JavaScript will not be executed. This restriction bans both inline blocks and inline event handlers (e.g. By above lines it is clear that your popup.html violates restrictions, which can be solved as follows: Remove all I did not literally copy-paste the code in Final popup.js Cautions for manifest.json Permissions for content script also Final manifest.json Your content script was fine, so I did not change it. Output: Let me know if you need more information.. 这篇关于在Chrome扩展中传递的基本消息似乎失败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！
$ name $b $ b $ name基本消息传递
description：这演示了基本消息传递，
browser_action：{
default_popup：popup.html，
default_icon：screen.png
}，
manifest_version：2，
version：2，
permissions：[tabs，< all_urls>]，
content_scripts： [
{
matches：[< all_urls>]，
js：[content.js]
}
]
}
示范
<html>
<head>
<script>
function finder() {
chrome.tabs.getSelected(null, function(tab) {
chrome.tabs.sendMessage(tab.id, {type: "feature"}, function(response) {
console.log(response.farewell);
});
});
}
</script>
<style>
p {
border: 1px solid black;
width:200px;
font-size:10px;
}
</style>
</head>
<body>
<p><a id="jira">Click to populate FE description</a></p>
<script>
var jira = document.getElementById('jira');
jira.addEventListener('click', finder, false);
</script>
</body>
</html>
chrome.extension.onMessage.addListener(function(request, sender, sendResponse) {
alert('sreceived');
if (request.type == "feature") {
alert('score!');
}
});
<button onclick="...">).<script> tags in popup.html and move the original code to popup.js.<html>
<head>
<script src="popup.js"></script> <!-- Added this line -->
<style>
p {
border: 1px solid black;
width:200px;
font-size:10px;
}
</style>
</head>
<body>
<p><a id="jira">Click to populate FE description</a></p>
</body>
</html>
popup.js. These are the changes I made:
chrome.tabs.getSelected() is deprecated in favour of chrome.tabs.query(), so I updated chrome.tabs.getSelected(null, function(tab) {});console.log(response.farewell); because there is no response handler from content script.function finder() {
chrome.tabs.query({
"status": "complete",
"currentWindow": true,
"active": true
}, function (tabs) {
chrome.tabs.sendMessage(tabs[0].id, {
type: "feature"
}, function (response) {
//console.log(response.farewell);
});
});
}
document.addEventListener('DOMContentLoaded',= function() {
document.getElementById('jira').onclick = finder;
});
"permissions":["tabs","<all_urls>"],"content_scripts": [
{
"matches": ["<all_urls>"],
"js": ["content.js"]
}
]
{
"name":"Basic Message Passing",
"description":"This demonstrates Basic Message Passing",
"browser_action":{
"default_popup":"popup.html",
"default_icon":"screen.png"
},
"manifest_version":2,
"version":"2",
"permissions":["tabs","<all_urls>"],
"content_scripts": [
{
"matches": ["<all_urls>"],
"js": ["content.js"]
}
]
}
Demonstration
