blocks|key|1094976|text|更新答案以反映清单的v3：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1094977|Chromium现在有了一组chrome.runtime+API，允许您获取扩展的版本。|offset|length|1094978|要获取当前版本：|1094979|chrome.runtime.getManifest().version|code-block|syntax|javascript|1094980|要侦听扩展首次安装的时间、扩展更新到新版本的时间以及Chromium更新到新版本的时间，可以使用onInstalled事件。|style|CODE|1094981|chrome.runtime.onInstalled.addListener((details)+=>+{
+++const+currentVersion+=+chrome.runtime.getManifest().version
+++const+previousVersion+=+details.previousVersion
+++const+reason+=+details.reason
+++
+++console.log('Previous+Version:+${previousVersion+}')
+++console.log('Current+Version:+${currentVersion+}')

+++switch+(reason)+{
++++++case+'install':
+++++++++console.log('New+User+installed+the+extension.')
+++++++++break;
++++++case+'update':
+++++++++console.log('User+has+updated+their+extension.')
+++++++++break;
++++++case+'chrome_update':
++++++case+'shared_module_update':
++++++default:
+++++++++console.log('Other+install+events+within+the+browser')
+++++++++break;
+++}

})|1094982|这就是全部！|1094983|1094984|老答案，2011年前|1094985|如果您想检查扩展是否已安装或更新，可以执行以下操作：|1094986|function+onInstall()+{
++++console.log("Extension+Installed");
++}

++function+onUpdate()+{
++++console.log("Extension+Updated");
++}

++function+getVersion()+{
++++var+details+=+chrome.app.getDetails();
++++return+details.version;
++}

++//+Check+if+the+version+has+changed.
++var+currVersion+=+getVersion();
++var+prevVersion+=+localStorage['version']
++if+(currVersion+!=+prevVersion)+{
++++//+Check+if+we+just+installed+this+extension.
++++if+(typeof+prevVersion+==+'undefined')+{
++++++onInstall();
++++}+else+{
++++++onUpdate();
++++}
++++localStorage['version']+=+currVersion;
++}|1094987|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.chrome.com/extensions/runtime^0|0|E|E|0|0|0|0|1C|B|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1A|8|@]|9|@$D|1B|E|1C|1|1D]]|A|$]]|$1|F|3|G|5|6|7|1E|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1F|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1G|8|@$D|1H|E|1I|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|J|7|1J|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|1K|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1M|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1N|8|@]|9|@]|A|$]]|$1|Z|3|10|5|J|7|1O|8|@]|9|@]|A|$K|L]]|$1|11|3|-4|5|6|7|1P|8|@]|9|@]|A|$]]]|12|$13|$5|14|15|16|A|$17|18]]]]

Updated answer to reflect v3 of manifest:
Chromium now has a <a href="https://developer.chrome.com/extensions/runtime" rel="noreferrer">chrome.runtime</a> set of APIs, which allow you to fetch the version of the extension.
To get the current version:
<pre><code>chrome.runtime.getManifest().version
</code></pre>
To listen when the extension has been first installed, when the extension is updated to a new version, and when Chromium is updated to a new version, you can use the <code>onInstalled</code> event.
<pre class="lang-js prettyprint-override"><code>chrome.runtime.onInstalled.addListener((details) =&gt; {
 const currentVersion = chrome.runtime.getManifest().version
 const previousVersion = details.previousVersion
 const reason = details.reason
 
 console.log('Previous Version: ${previousVersion }')
 console.log('Current Version: ${currentVersion }')

 switch (reason) {
 case 'install':
 console.log('New User installed the extension.')
 break;
 case 'update':
 console.log('User has updated their extension.')
 break;
 case 'chrome_update':
 case 'shared_module_update':
 default:
 console.log('Other install events within the browser')
 break;
 }

})
</code></pre>
Thats all!
<hr />
Old answer, prior to 2011
If you want to check if the extension has been installed or updated, you can do something like this:
<pre class="lang-js prettyprint-override"><code>function onInstall() {
 console.log(&quot;Extension Installed&quot;);
 }

 function onUpdate() {
 console.log(&quot;Extension Updated&quot;);
 }

 function getVersion() {
 var details = chrome.app.getDetails();
 return details.version;
 }

 // Check if the version has changed.
 var currVersion = getVersion();
 var prevVersion = localStorage['version']
 if (currVersion != prevVersion) {
 // Check if we just installed this extension.
 if (typeof prevVersion == 'undefined') {
 onInstall();
 } else {
 onUpdate();
 }
 localStorage['version'] = currVersion;
 }
</code></pre>

blocks|key|1095029|text|在新版本的Chrome中(从Chrome22开始)，您可以使用chrome.runtime.onInstalled事件，它更加简洁。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1095030|示例：|1095031|//+Check+whether+new+version+is+installed
chrome.runtime.onInstalled.addListener(function(details){
++++if(details.reason+==+"install"){
++++++++console.log("This+is+a+first+install!");
++++}else+if(details.reason+==+"update"){
++++++++var+thisVersion+=+chrome.runtime.getManifest().version;
++++++++console.log("Updated+from+"+%2B+details.previousVersion+%2B+"+to+"+%2B+thisVersion+%2B+"!");
++++}
});|code-block|syntax|javascript|1095032|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.chrome.com/extensions/runtime.html#event-onInstalled^0|V|Q|V|Q|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

In newer versions of Chrome (since Chrome 22), you can use the <a href="http://developer.chrome.com/extensions/runtime.html#event-onInstalled" rel="noreferrer"><code>chrome.runtime.onInstalled</code></a> event, which is much cleaner.

Example:

<pre class="lang-js prettyprint-override"><code>// Check whether new version is installed
chrome.runtime.onInstalled.addListener(function(details){
 if(details.reason == "install"){
 console.log("This is a first install!");
 }else if(details.reason == "update"){
 var thisVersion = chrome.runtime.getManifest().version;
 console.log("Updated from " + details.previousVersion + " to " + thisVersion + "!");
 }
});
</code></pre>

How can an extension find out that it is being run for the first time or has just been updated, so that the extension can perform some specific actions? (e.g. open a help page or update settings)

Detect Chrome extension first run / update

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

扩展如何发现它是第一次运行或刚刚更新，以便扩展可以执行一些特定的操作？(例如，打开帮助页或更新设置)

问检测Chrome扩展首次运行/更新
EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问检测Chrome扩展首次运行/更新EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问检测Chrome扩展首次运行/更新
EN