manifest.json

{
  "name": "Getting Started Example",
  "description": "Build an Extension!",
  "version": "1.0",
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js"
  },
  "permissions": ["storage", "activeTab", "scripting"],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/get_started16.png",
      "32": "/images/get_started32.png",
      "48": "/images/get_started48.png",
      "128": "/images/get_started128.png"
    }
  },
  "icons": {
    "16": "/images/get_started16.png",
    "32": "/images/get_started32.png",
    "48": "/images/get_started48.png",
    "128": "/images/get_started128.png"
  },
  "options_page": "options.html"
}

popup.html

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="button.css">
  </head>
  <body>
    <button id="changeColor"></button>
    <script src="popup.js"></script>
  </body>
</html>

popup.js

// Initialize butotn with users's prefered color
let changeColor = document.getElementById("changeColor");

chrome.storage.sync.get("color", ({ color }) => {
  changeColor.style.backgroundColor = color;
});

// When the button is clicked, inject setPageBackgroundColor into current page
changeColor.addEventListener("click", async () => {
  let [tab] = await chrome.tabs.query({ active: true, currentWindow: true });

  chrome.scripting.executeScript({
    target: { tabId: tab.id },
    function: setPageBackgroundColor,
  });
});

// The body of this function will be execuetd as a content script inside the
// current page
function setPageBackgroundColor() {
  chrome.storage.sync.get("color", ({ color }) => {
    document.body.style.backgroundColor = color;
  });
}

options.html

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="button.css">
  </head>
  <body>
    <div id="buttonDiv">
    </div>
    <div>
      <p>Choose a different background color!</p>
    </div>
  </body>
  <script src="options.js"></script>
</html>

button.css

button {
  height: 30px;
  width: 30px;
  outline: none;
  margin: 10px;
  border: none;
  border-radius: 2px;
}

button.current {
  box-shadow: 0 0 0 2px white,
              0 0 0 4px black;
}

options.js

let page = document.getElementById("buttonDiv");
let selectedClassName = "current";
const presetButtonColors = ["#3aa757", "#e8453c", "#f9bb2d", "#4688f1"];

// Reacts to a button click by marking marking the selected button and saving
// the selection
function handleButtonClick(event) {
  // Remove styling from the previously selected color
  let current = event.target.parentElement.querySelector(
    `.${selectedClassName}`
  );
  if (current && current !== event.target) {
    current.classList.remove(selectedClassName);
  }

  // Mark the button as selected
  let color = event.target.dataset.color;
  event.target.classList.add(selectedClassName);
  chrome.storage.sync.set({ color });
}

// Add a button to the page for each supplied color
function constructOptions(buttonColors) {
  chrome.storage.sync.get("color", (data) => {
    let currentColor = data.color;

    // For each color we were provided…
    for (let buttonColor of buttonColors) {
      // …crate a button with that color…
      let button = document.createElement("button");
      button.dataset.color = buttonColor;
      button.style.backgroundColor = buttonColor;

      // …mark the currently selected color…
      if (buttonColor === currentColor) {
        button.classList.add(selectedClassName);
      }

      // …and register a listener for when that button is clicked
      button.addEventListener("click", handleButtonClick);
      page.appendChild(button);
    }
  });
}

// Initialize the page by constructing the color options
constructOptions(presetButtonColors);

posted @ 2022-02-15 10:37 冰糖葫芦很乖阅读(82) 评论(0) 编辑收藏举报

冰糖葫芦很乖

扩展程序官方例子解析