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                [TOC] ## background - background可以理解為插件運行在瀏覽器中的一個后臺網站/腳本,注意它是與當前瀏覽頁面無關的 在 manifest.json 配置 ``` "background": { "page": "background/background.html", "scripts": ["background.js"], // 推薦 "persistent": false }, ``` > manifest.json 中 script 一般為自己所寫的腳本,第三方引入的腳本,可在page 中直接引入 > persistent,設置為true,則腳本的生命周期與瀏覽器相同,為false,只在活動時運行, ## popup與background的通信 ``` var bg = chrome.extension.getBackgroundPage(); bg.someMethod(); //someMethod()是background中的一個方法 ``` ### 示例 background.js ``` var count = 0; ``` popup.js ``` var bg = chrome.extension.getBackgroundPage(); $(function(){ $('#input').val(bg.count); $('#btn').click(function(){ bg.count = bg.count+1; $('#input').val(bg.count); }); }) ```
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