Javascript Google Chrome扩展获取选定文本有时为空?
我正在开发小小的chrome扩展 我无法理解getSelection在chrome扩展中是如何工作的 有时所选文本加载,有时为空。为什么 这是我的清单文件:Javascript Google Chrome扩展获取选定文本有时为空?,javascript,google-chrome,google-chrome-extension,google-chrome-devtools,google-chrome-app,Javascript,Google Chrome,Google Chrome Extension,Google Chrome Devtools,Google Chrome App,我正在开发小小的chrome扩展 我无法理解getSelection在chrome扩展中是如何工作的 有时所选文本加载,有时为空。为什么 这是我的清单文件: { "background": { "scripts": [ "js/pop.js" ] }, "browser_action": { "default_icon": "icons/icon.png", "default_popup": "popup.html" }, "con
{
"background": {
"scripts": [
"js/pop.js"
]
},
"browser_action": {
"default_icon": "icons/icon.png",
"default_popup": "popup.html"
},
"content_scripts": [
{
"js": [
"js/contentscript.js",
"js/lib/jquery-2.1.4.min.js",
"js/lib/hi5.js"
],
"matches": [
"http://*/*",
"https://*/*",
"file://*",
"<all_urls>"
],
"run_at": "document_end",
"all_frames": true
}
],
"icons": {
"16": "icons/icon16.png",
"24": "icons/icon24.png",
"32": "icons/icon32.png",
"48": "icons/icon48.png",
"64": "icons/icon64.png",
"96": "icons/icon96.png",
"128": "icons/icon128.png"
},
"commands": {
"_execute_browser_action": {
"suggested_key": {
"chromeos": "Alt+D"
}
}
},
"name": "App",
"manifest_version": 2,
"permissions": [
"tabs",
"contentSettings",
"management",
"contextMenus",
"http://*/",
"https://*/",
"<all_urls>",
"storage",
"unlimitedStorage"
],
"update_url": "https://clients2.google.com/service/update2/crx",
"version": "1.0",
"web_accessible_resources": [
"js/lib/jquery-2.1.4.min.js"
]
}
这是我的pop.js:
document.addEventListener('DOMContentLoaded', function () {
chrome.tabs.query({active: true, windowId: chrome.windows.WINDOW_ID_CURRENT},
function (tab) {
chrome.tabs.sendMessage(tab[0].id, {method: "getSelection"},
function (response) {
var selectedTex = response.data;
if (selectedTex.length > 1) {
$("#search-basic").val(selectedTex);
}
});
});
});
这是我的popUp.html
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>jQuery Mobile: Theme Download</title>
<link rel="stylesheet" href="themes/deneme.min.css"/>
<link rel="stylesheet" href="themes/jquery.mobile.icons.min.css"/>
<link rel="stylesheet" href="./css/jquery.mobile-1.4.5.min.css"/>
<script type="text/javascript" src="./js/lib/jquery-2.1.4.min.js"></script>
<script type="text/javascript" src="./js/lib/jquery.mobile-1.4.5.min.js"></script>
<script type="text/javascript" src="./js/pop.js"></script>
</head>
<body>
<input type="search" name="search" id="search-basic" value=""/>
</body>
</html>
jquerymobile:主题下载
我认为您的问题在于获取所选文本的方式
而是使用:
var selectedText = window.getSelection().toString();
请尝试以下其他代码:
var-focused=document.activeElement;
var选择文本;
如果(聚焦){
试一试{
selectedText=focused.value.substring(
聚焦。选择开始,聚焦。选择结束);
}捕捉(错误){
}
}
如果(selectedText==未定义){
var sel=window.getSelection();
selectedText=sel.toString();
}
chrome.tabs.sendMessage默认情况下将消息发送到页面的所有帧。尝试根据指定frameId:0
。
var selectedText = window.getSelection().toString();