How to click on a button in Chrome Extension

问题

I am just trying to set up a simple chrome extension that will just click on an element once the extension button is clicked on.

I have researched this a bit, and I can't find a simple answer that says how to click, everyone else has very elaborate code that I can't understand and don't know if it's necessary or not. What I mean is, whenever I search for just "click" I find a question that is much more advanced than my level.

(I am about to make a lot of $ off of this extension, so please will you help a brother out ;)

Using what I have seen I have scraped together the code:

popup.js:

var evt = document.createEvent ("HTMLEvents");
evt.initEvent ("click", true, true);

document.getElementById('product-addtocart-button').dispatchEvent (evt);

manifest.Json:

{
  "manifest_version": 2,

  "name": "Shoe BOT",
  "description": "This extension shows a Google Image search result for the current page",
  "version": "1.0",

  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "https://shop.adidas.ae/en/"
  ]
}

popup.html:

<!doctype html>
<!--
 This page is shown when the extension button is clicked, because the
 "browser_action" field in manifest.json contains the "default_popup" key with
 value "popup.html".
 -->
<html>
  <head>
    <title>Getting Started Extension's Popup</title>
    <style>
      body {

      }
      #status {

      }
    </style>

    <!--
      - JavaScript and HTML must be in separate files: see our Content Security
      - Policy documentation[1] for details and explanation.
      -
      - [1]: https://developer.chrome.com/extensions/contentSecurityPolicy
     -->
    <script src="popup.js"></script>
  </head>
  <body>
    <!--<div id="status"></div>
    <img id="image-result" hidden>-->
  </body>
</html>

回答1:

It is not clear why you are using document.createEvent(). That interface is deprecated. To create events, you should be using event constructors. However, for a generic click event on an HTML element, you can just use the click() method without having to actually construct the event.

A simple, complete Chrome extension which injects a content script to click the button with id="product-addtocart-button" when you click on a browser_action button would be:

background.js:

chrome.browserAction.onClicked.addListener(function(tab) {
    chrome.tabs.executeScript(tab.id,{
        code: "document.getElementById('product-addtocart-button').click();"
    });
});

manifest.json:

{
    "description": "Click a button with ID=product-addtocart-button",
    "manifest_version": 2,
    "name": "click-product-addtocart-button",
    "version": "0.1",

    "permissions": [
        "activeTab"
    ],

    "background": {
        "scripts": [
            "background.js"
        ]
    },

    "browser_action": {
        "default_icon": {
            "32": "myIcon.png"
        },
        "default_title": "Click product-addtocart-button"
    }
}

来源：https://stackoverflow.com/questions/40244252/how-to-click-on-a-button-in-chrome-extension

标签

javascript

jquery

html

google-chrome

google-chrome-extension