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javascriptgoogle-chromegoogle-chrome-extension

Chrome Extension: How to inject code code into a new window

So let's say I want to inject some code to create a button on a new window in chrome (The window itself is opened via the extension's popup.js). How would I go about doing this?

Solution

  • you can use functions such as documnet.body.appendChild() instead of console.log() in foreground.js after opening files with the names I gave their names and filling them in this way. You can add whatever you want to the page this way.

    background.js

    function as(a,b,c) {
       
     chrome.tabs.executeScript(null, {file: "foreground.js"});
        chrome.tabs.insertCSS(null,{file:'./style.css'})
        console.log(a,b,c+'asd')
}
chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
    as(tabId, changeInfo, tab);
});

    foreground.js

    window.onload=()=>{
    console.log('ok')
}

    manifest.json

    {
    "name": "plugin",
    "version": "1.0",
    "manifest_version":2,
    "background": {
        "scripts":["./background.js"]
    },
    "browser_action":{
        "default_popup":"popup.html"
    },
    "permissions":[
      "tabs",
        "https://*/*"
    ]
}

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>

    style.css

    button{
    color:red;
}