Javascript[Chrome扩展]开发中如何使用setInterval

Question

我正在学习如何制作 chrome 扩展，我正在处理的项目是 'Clock' 在新选项卡中。

问题：我能够检索当前时间，但无法每秒刷新页面。我该如何解决这个问题？

main.js

setInterval(function () {
  var d = new Date();

  const h = d.getHours();
  const m = d.getMinutes();
  const s = d.getSeconds();

  // Current Time w/ format
  const cFormat = h + ":" + m;

  const cTime = document.getElementById("cTime");
  cTime.textContent = cFormat;
}, 1000);

manifest.json

{
    "manifest_version": 3,
    "name": "ClockTab",
    "description": "Clock.",
    "version": "1.0.0",
    "persistent": true,
    "icons": {"128": "icon_128.png"},
    "host_permissions": ["<all_urls>","activeTab","tabs"],
    "action" : {
        "default_popup": "popup.html",
        "default_icon": "icon_128.png"
    },
    "chrome_url_overrides" : {
        "newtab": "index.html"
    },
    "background": {
        "service_worker": "main.js",
    },
    "content_scripts": [{
        "css": ["style.css","popup.css"],
        "js": ["jquery.min.js", "main.js", "popup.js","dateTime.js"],
        "all_frames": true,
        "matches": ["http://*/*"]
    }]
}

index.html

<div id="cTime"></div>

Answer 1

我选择了 setTimeout 允许时钟每秒刷新一次，这仅在页面加载后发生。

main.js

function start() {

  // Clock
  function getTime() {
    var d = new Date();

    const h = d.getHours();
    const m = d.getMinutes();
    const s = d.getSeconds();

    // Current Time w/ format
    const cFormat = h + ":" + m;

    const cTime = document.getElementById("cTime");
    cTime.textContent = cFormat;

    setTimeout(function () {
      getTime();
    }, 1000);
  }

  getTime();
}

window.addEventListener("load", start);

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