{"id":425,"date":"2024-10-25T11:34:59","date_gmt":"2024-10-25T03:34:59","guid":{"rendered":"https:\/\/eve2333.top\/?p=425"},"modified":"2024-10-25T11:34:59","modified_gmt":"2024-10-25T03:34:59","slug":"javascript-api%e5%ad%a6%e4%b9%a0-part-4","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=425","title":{"rendered":"Javascript api\u5b66\u4e60 part-4"},"content":{"rendered":"\n

\u5176\u4ed6\u4e8b\u4ef6<\/h1>\n\n\n\n

\u9875\u9762\u52a0\u8f7d\u4e8b\u4ef6<\/h3>\n\n\n\n

\u5916\u90e8\u8d44\u6e90\uff08\u5982\u56fe\u7247\u3001\u5916\u8054CSS\u548cJavaScript\u7b49\uff09\u52a0\u8f7d\u5b8c\u6bd5\u65f6\u89e6\u53d1\u7684\u4e8b\u4ef6
\u539f\u56e0\uff1a\u6709\u4e9b\u65f6\u5019\u9700\u8981\u7b49\u9875\u9762\u8d44\u6e90\u5168\u90e8\u5904\u7406\u5b8c\u4e86\u505a\u4e00\u4e9b\u4e8b\u60c5\uff0c\u8001\u4ee3\u7801\u559c\u6b22\u628a script \u5199\u5728 head \u4e2d\uff0c\u8fd9\u65f6\u5019\u76f4\u63a5\u627e dom \u5143\u7d20\u627e\u4e0d\u5230\u3002
\u4e8b\u4ef6\u540d\uff1a load
\u76d1\u542c\u9875\u9762\u6240\u6709\u8d44\u6e90\u52a0\u8f7d\u5b8c\u6bd5\uff1a\u7ed9 window \u6dfb\u52a0 load \u4e8b\u4ef6<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

 \u4e0d\u5149\u53ef\u4ee5\u76d1\u542c\u6574\u4e2a\u9875\u9762\u8d44\u6e90\u52a0\u8f7d\u5b8c\u6bd5\uff0c\u4e5f\u53ef\u4ee5\u9488\u5bf9\u67d0\u4e2a\u8d44\u6e90\u7ed1\u5b9aload\u4e8b\u4ef6<\/p>\n\n\n\n

                        \u5f53\u521d\u59cb\u7684HTML\u6587\u6863\u88ab\u5b8c\u5168\u52a0\u8f7d\u548c\u89e3\u6790\u5b8c\u6210\u4e4b\u540e\uff0cDOMContentLoaded \u4e8b\u4ef6\u88ab\u89e6\u53d1\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u6837\u5f0f\u8868\u3001\u56fe\u50cf\u7b49\u5b8c\u5168\u52a0\u8f7d
\u4e8b\u4ef6\u540d\uff1a DOMContentLoaded
\u76d1\u542c\u9875\u9762DOM\u52a0\u8f7d\u5b8c\u6bd5\uff1a\u7ed9 document \u6dfb\u52a0 DOMContentLoaded \u4e8b\u4ef6<\/p>\n\n\n\n

\u9875\u9762\u6eda\u52a8\u4e8b\u4ef6<\/h3>\n\n\n\n

\u6eda\u52a8\u6761\u5728\u6eda\u52a8\u7684\u65f6\u5019\u6301\u7eed\u89e6\u53d1\u7684\u4e8b\u4ef6\u3002\u5f88\u591a\u7f51\u9875\u9700\u8981\u68c0\u6d4b\u7528\u6237\u628a\u9875\u9762\u6eda\u52a8\u5230\u67d0\u4e2a\u533a\u57df\u540e\u505a\u4e00\u4e9b\u5904\u7406\uff0c \u6bd4\u5982\u56fa\u5b9a\u5bfc\u822a\u680f\uff0c\u6bd4\u5982\u8fd4\u56de\u9876\u90e8\u3002
\u4e8b\u4ef6\u540d\uff1ascroll
\u76d1\u542c\u6574\u4e2a\u9875\u9762\u6eda\u52a8\uff1awindow.addEventListenter.('scroll',function(){console.log('man!')})<\/p>\n\n\n\n

scroll\u4e0d\u4f1a\u5192\u6ce1\uff0c\u8981\u60f3\u7ed9\u5355\u72ec\u6807\u7b7e\u52a0\u4e0a\u6eda\u52a8\u6761\u53ef\u4ee5\u76f4\u63a5\u5199\u5728\u8fd9\u4e2a\u6807\u7b7e\u4e0a<\/p>\n\n\n\n

scrollLeft \u548c scrollTop \uff08\u5c5e\u6027\uff09<\/strong>\uff1a
\u83b7\u53d6\u88ab\u5377\u53bb\u7684\u5927\u5c0f\uff0c\u83b7\u53d6\u5143\u7d20\u5185\u5bb9\u5f80\u5de6\u3001\u5f80\u4e0a\u6eda\u51fa\u53bb\u770b\u4e0d\u5230\u7684\u8ddd\u79bb\uff0c\u8fd9\u4e24\u4e2a\u503c\u662f\u53ef\u8bfb\u5199\u7684, <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
<script>\n    const div = document.querySelector('div')\n    \/\/ \u9875\u9762\u6eda\u52a8\u4e8b\u4ef6\n    window.addEventListener('scroll', function () {\n      \/\/ \u83b7\u53d6html\u5143\u7d20\u5199\u6cd5  \n      \/\/ document.documentElement  \n      const n = document.documentElement.scrollTop\n      if (n >= 100) {\n        div.style.display = 'block'\n      } else {\n        div.style.display = 'none'\n      }\n    })\n  <\/script><\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd4\u56de\u9876\u90e8<\/h3>\n\n\n\n
    <script>\n        \/\/ \u70b9\u51fb\u8fd4\u56de\u9875\u9762\u9876\u90e8\n        const backTop = document.querySelector('#backTop')\n        backTop.addEventListener('click', function () {\n            \/\/ \u53ef\u8bfb\u5199\n            \/\/ document.documentElement.scrollTop = 0\n            window.scrollTo(0, 0)\n        })\n    <\/script><\/code><\/pre>\n\n\n\n
\u5c0f\u5154\u9c9c\u663e\u793a\u5bfc\u822a\u548c\u8fd4\u56de\u9876\u90e8\u6848\u4f8b<\/h1>\n\n\n\n
\u5c06\u878d\u5408\u5728\u7efc\u5408\u6848\u4f8b\u4e2d\u6765\u5199<\/p>\n\n\n\n
\u9875\u9762\u5c3a\u5bf8\u4e8b\u4ef6<\/h3>\n\n\n\n
window.addEventListener('resize',function(){console.log(manbaout)})<\/p>\n\n\n\n
\u68c0\u6d4b\u5c4f\u5e55\u5bbd\u5ea6 <\/p>\n\n\n\n
\u8fd9\u91cc\u5176\u5b9e\u6709\u4e00\u4e2a\u6e90\u7801<\/strong><\/p>\n\n\n\n
\u5143\u7d20\u5c3a\u5bf8\u4e0e\u4f4d\u7f6e<\/h1>\n\n\n\n
\u5c31\u662f\u901a\u8fc7js\u7684\u65b9\u5f0f\uff0c\u5f97\u5230 \u5143\u7d20\u5728\u9875\u9762\u4e2d\u7684\u4f4d\u7f6e
\u25cf \u00a0\u83b7\u53d6\u5bbd\u9ad8\uff1a offsetWidth\u548coffsetHeight \uff08\u5185\u5bb9 + padding + border\uff09
\u83b7\u53d6\u5143\u7d20\u7684\u81ea\u8eab\u5bbd\u9ad8\u3001\u5305\u542b\u5143\u7d20\u81ea\u8eab\u8bbe\u7f6e\u7684\u5bbd\u9ad8\u3001padding\u3001border\u3002\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u83b7\u53d6\u7684\u662f\u6570\u503c\uff0c\u65b9\u4fbf\u8ba1\u7b97\u3002\u00a0
\u6ce8\u610f: \u83b7\u53d6\u7684\u662f\u53ef\u89c6\u5bbd\u9ad8, \u5982\u679c\u76d2\u5b50\u662f\u9690\u85cf\u7684,\u83b7\u53d6\u7684\u7ed3\u679c\u662f0
\u25cf \u00a0\u83b7\u53d6\u4f4d\u7f6e\uff1a
1.offsetLeft\u548coffsetTop
\u83b7\u53d6\u5143\u7d20\u8ddd\u79bb\u81ea\u5df1 \u5b9a\u4f4d\u7236\u7ea7\u5143\u7d20 \u7684\u5de6\u3001\u4e0a\u8ddd\u79bb\uff0c \u5982\u679c\u90fd\u6ca1\u6709\u5219\u4ee5 \u6587\u6863\u5de6\u4e0a\u89d2 \u4e3a\u51c6\u3002
\u6ce8\u610f\uff1aoffsetLeft\u548coffsetTop \u662f\u53ea\u8bfb\u5c5e\u6027 \u200b\"\"<\/p>\n\n\n\n
 \u4eff\u4eac\u4e1c\u6548\u679c\u5bfc\u822a\u680f\u6848\u4f8b<\/h1>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n\n<head>\n    <meta charset=\"UTF-8\">\n    <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>Document<\/title>\n    <style>\n        * {\n            margin: 0;\n            padding: 0;\n            box-sizing: border-box;\n        }\n\n        .content {\n            overflow: hidden;\n            width: 1000px;\n            height: 3000px;\n            background-color: pink;\n            margin: 0 auto;\n        }\n\n        .backtop {\n            display: none;\n            width: 50px;\n            left: 50%;\n            margin: 0 0 0 505px;\n            position: fixed;\n            bottom: 60px;\n            z-index: 100;\n        }\n\n        .backtop a {\n            height: 50px;\n            width: 50px;\n            background: url(.\/images\/bg2.png) 0 -600px no-repeat;\n            opacity: 0.35;\n            overflow: hidden;\n            display: block;\n            text-indent: -999em;\n            cursor: pointer;\n        }\n\n        .header {\n            position: fixed;\n            top: -80px;\n            left: 0;\n            width: 100%;\n            height: 80px;\n            background-color: purple;\n            text-align: center;\n            color: #fff;\n            line-height: 80px;\n            font-size: 30px;\n            transition: all .3s;\n        }\n\n        .sk {\n            width: 300px;\n            height: 300px;\n            background-color: skyblue;\n            margin-top: 600px;\n        }\n    <\/style>\n<\/head>\n\n<body>\n    <div class=\"header\">\u6211\u662f\u9876\u90e8\u5bfc\u822a\u680f<\/div>\n    <div class=\"content\">\n        <div class=\"sk\">\u79d2\u6740\u6a21\u5757<\/div>\n    <\/div>\n    <div class=\"backtop\">\n        <img src=\".\/images\/close2.png\" alt=\"\">\n        <a href=\"javascript:;\"><\/a>\n    <\/div>\n\n\n    <script>\n        \/\/ \u83b7\u53d6 header\n        let header = document.querySelector('.header');\n        \/\/ \u83b7\u53d6sk\n        let sk = document.querySelector('.sk');\n        \/\/ \u5f53\u7a97\u53e3\u6eda\u52a8\u8ddd\u79bb \u5927\u4e8e\u6216\u8005\u7b49\u4e8e sk\u8ddd\u79bb\u7236\u4eb2\u7684\u8ddd\u79bb \u7684\u65f6\u5019 \u8ba9header\u663e\u793a\n        window.addEventListener('scroll', function () {\n            \/\/ \u7f51\u9875\u8ddd\u79bb : document.documentElement\n            \/\/ scrollTop : \u662f\u5143\u7d20\u5185\u5bb9\u6eda\u52a8\u7684\u8ddd\u79bb\n            \/\/ offsetTop : \u662f\u8ddd\u79bb\u81ea\u5df1\u5b9a\u4f4d\u79bb\u7236\u5143\u7d20\u7684\u8ddd\u79bb\n            if (document.documentElement.scrollTop >= sk.offsetTop) {\n                \/\/\u8ba9\u9876\u90e8\u5143\u7d20\u663e\u793a\n                header.style.top = 0;\n            } else {\n                \/\/ \u8ba9\u9876\u90e8\u5143\u7d20\u9690\u85cf\n                header.style.top = '-80px';\n            }\n        });\n    <\/script>\n<\/body>\n\n<\/html><\/code><\/pre>\n\n\n\n
\u54d4\u54e9\u54d4\u54e9\u5c0f\u7ea2\u8272\u6ed1\u5757<\/h1>\n\n\n\n
\u7f3a\u5c11\u4ee3\u7801\uff0c\u4f46\u662f\u6709\u6838\u5fc3\u601d\u60f3<\/p>\n\n\n\n
\u901a\u8fc7\u89c6\u53e3\u6765\u83b7\u5f97\u5143\u7d20\u4f4d\u7f6e<\/h2>\n\n\n\n
<style>\nbody{\nheight: 2000px;\n}\ndiv {\nwidth:200px; height: 200px; background-color:\npink; margin: 100px;\n}\n<\/style> \n<\/head> \n<body>\n<div><\/div> \n<script>\nconst div = document.querySelector('div') \nconsole.log(div.getBoundingClientRect()) \n<\/script>\n<\/body> <\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u4e0d\u7528\u951a\u70b9\u94fe\u63a5\u505a\u5c0f\u5154\u9c9c\u7535\u68af\u5bfc\u822a<\/h1>\n\n\n\n
  <script>\n    \/\/ \u7b2c\u4e00\u5927\u6a21\u5757\uff0c\u9875\u9762\u6ed1\u52a8\u53ef\u4ee5\u663e\u793a\u548c\u9690\u85cf\n    (function () {\n      \/\/ \u83b7\u53d6\u5143\u7d20\n      const entry = document.querySelector('.xtx_entry')\n      const elevator = document.querySelector('.xtx-elevator')\n      \/\/ 1. \u5f53\u9875\u9762\u6eda\u52a8\u5927\u4e8e 300\u50cf\u7d20\uff0c\u5c31\u663e\u793a \u7535\u68af\u5bfc\u822a\n      \/\/ 2. \u7ed9\u9875\u9762\u6dfb\u52a0\u6eda\u52a8\u4e8b\u4ef6\n      window.addEventListener('scroll', function () {\n        \/\/ \u88ab\u5377\u53bb\u7684\u5934\u90e8\u5927\u4e8e 300 \n        const n = document.documentElement.scrollTop\n        elevator.style.opacity = n >= entry.offsetTop ? 1 : 0\n      })\n \n      \/\/ \u70b9\u51fb\u8fd4\u56de\u9875\u9762\u9876\u90e8\n      const backTop = document.querySelector('#backTop')\n      backTop.addEventListener('click', function () {\n        \/\/ \u53ef\u8bfb\u5199\n        \/\/ document.documentElement.scrollTop = 0\n        window.scrollTo(0, 0)\n      })\n    })();\n \n    \/\/ \u7b2c\u4e8c\u7b2c\u4e09\u90fd\u653e\u5230\u53e6\u5916\u4e00\u4e2a\u6267\u884c\u51fd\u6570\u91cc\u9762\n    (function () {\n      \/\/ 2. \u70b9\u51fb\u9875\u9762\u53ef\u4ee5\u6ed1\u52a8 \n      const list = document.querySelector('.xtx-elevator-list')\n      list.addEventListener('click', function (e) {\n        \/\/ console.log(11)\n        if (e.target.tagName === 'A' && e.target.dataset.name) {\n          \/\/ \u6392\u4ed6\u601d\u60f3  \n          \/\/ \u5148\u79fb\u9664\u539f\u6765\u7684\u7c7bactive \n          \/\/ \u5148\u83b7\u53d6\u8fd9\u4e2aactive\u7684\u5bf9\u8c61\n          const old = document.querySelector('.xtx-elevator-list .active')\n          \/\/ console.log(old)\n          \/\/ \u5224\u65ad \u5982\u679c\u539f\u6765\u6709active\u7c7b\u7684\u5bf9\u8c61\uff0c\u5c31\u79fb\u9664\u7c7b\uff0c\u5982\u679c\u5f00\u59cb\u5c31\u6ca1\u6709\u5bf9\u8c61\uff0c\u5c31\u4e0d\u5220\u9664\uff0c\u6240\u4ee5\u4e0d\u62a5\u9519\n          if (old) old.classList.remove('active')\n          \/\/ \u5f53\u524d\u5143\u7d20\u6dfb\u52a0 active \n          e.target.classList.add('active')\n          \/\/ \u83b7\u5f97\u81ea\u5b9a\u4e49\u5c5e\u6027  new   topic \n          \/\/ console.log(e.target.dataset.name)\n          \/\/ \u6839\u636e\u5c0f\u76d2\u5b50\u7684\u81ea\u5b9a\u4e49\u5c5e\u6027\u503c \u53bb\u9009\u62e9 \u5bf9\u5e94\u7684\u5927\u76d2\u5b50\n          \/\/ console.log(document.querySelector(`.xtx_goods_${e.target.dataset.name}`).offsetTop)\n          \/\/ \u83b7\u5f97\u5bf9\u5e94\u5927\u76d2\u5b50\u7684 offsetTop\n          const top = document.querySelector(`.xtx_goods_${e.target.dataset.name}`).offsetTop\n          \/\/ \u8ba9\u9875\u9762\u6eda\u52a8\u5230\u5bf9\u5e94\u7684\u4f4d\u7f6e\n          document.documentElement.scrollTop = top\n \n        }\n      })\n \n      \/\/ 3. \u9875\u9762\u6eda\u52a8\uff0c\u53ef\u4ee5\u6839\u636e\u5927\u76d2\u5b50\u9009 \u5c0f\u76d2\u5b50 \u6dfb\u52a0 active \u7c7b\n      window.addEventListener('scroll', function () {\n        \/\/  3.1  \u5148\u79fb\u9664\u7c7b \n        \/\/ \u5148\u83b7\u53d6\u8fd9\u4e2aactive\u7684\u5bf9\u8c61\n        const old = document.querySelector('.xtx-elevator-list .active')\n        \/\/ console.log(old)\n        \/\/ \u5224\u65ad \u5982\u679c\u539f\u6765\u6709active\u7c7b\u7684\u5bf9\u8c61\uff0c\u5c31\u79fb\u9664\u7c7b\uff0c\u5982\u679c\u5f00\u59cb\u5c31\u6ca1\u6709\u5bf9\u8c61\uff0c\u5c31\u4e0d\u5220\u9664\uff0c\u6240\u4ee5\u4e0d\u62a5\u9519\n        if (old) old.classList.remove('active')\n        \/\/ 3.2 \u5224\u65ad\u9875\u9762\u5f53\u524d\u6ed1\u52a8\u7684\u4f4d\u7f6e\uff0c\u9009\u62e9\u5c0f\u76d2\u5b50\n \n        \/\/ \u83b7\u53d64\u4e2a\u5927\u76d2\u5b50\n        const news = document.querySelector('.xtx_goods_new')\n        const popular = document.querySelector('.xtx_goods_popular')\n        const brand = document.querySelector('.xtx_goods_brand')\n        const topic = document.querySelector('.xtx_goods_topic')\n        const n = document.documentElement.scrollTop\n        if (n >= news.offsetTop && n < popular.offsetTop) {\n          \/\/ \u9009\u62e9\u7b2c\u4e00\u4e2a\u5c0f\u76d2\u5b50\n          document.querySelector('[data-name=new]').classList.add('active')\n        } else if (n >= popular.offsetTop && n < brand.offsetTop) {\n          document.querySelector('[data-name=popular]').classList.add('active')\n        } else if (n >= brand.offsetTop && n < topic.offsetTop) {\n          document.querySelector('[data-name=brand]').classList.add('active')\n        } else if (n >= topic.offsetTop) {\n          document.querySelector('[data-name=topic]').classList.add('active')\n        }\n      })\n    })();\n  <\/script><\/code><\/pre>\n\n\n\n
\u65e5\u671f\u5bf9\u8c61<\/h1>\n\n\n\n
\u5b9e\u4f8b\u5316<\/h3>\n\n\n\n
const date=new Date()\/\/\u5f97\u5230\u5f53\u524d\u65f6\u95f4\nconst date1=new Date('2022-5-1 08:30:00')\/\/\u6307\u5b9a\u65f6\u95f4<\/code><\/pre>\n\n\n\n
\u76ee\u6807\uff1a\u80fd\u591f\u4f7f\u7528\u65e5\u671f\u5bf9\u8c61\u4e2d\u7684\u65b9\u6cd5\u5199\u51fa\u5e38\u89c1\u65e5\u671f
\u4f7f\u7528\u573a\u666f\uff1a\u56e0\u4e3a\u65e5\u671f\u5bf9\u8c61\u8fd4\u56de\u7684\u6570\u636e\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\uff0c\u6240\u4ee5\u9700\u8981\u8f6c\u6362\u4e3a\u5b9e\u9645\u5f00\u53d1\u4e2d\u5e38\u7528\u7684\u683c\u5f0f
getFullYear()\u83b7\u5f97\u5e74\u4efd\u83b7\u53d6\u56db\u4f4d\u5e74\u4efd<\/p>\n\n\n\n
getMonth()\u83b7\u5f97\u6708\u4efd\u53d6\u503c\u4e3a0\uff5e11<\/p>\n\n\n\n
getDate()\u83b7\u53d6\u6708\u4efd\u4e2d\u7684\u6bcf\u4e00\u5929\uff0c\u4e0d\u540c\u6708\u4efd\u53d6\u503c\u4e5f\u4e0d\u76f8\u540c<\/p>\n\n\n\n
getDay()\u83b7\u53d6\u661f\u671f\uff0c\u53d6\u503c\u4e3a0\uff5e6<\/p>\n\n\n\n
getHours()\u83b7\u53d6\u5c0f\u65f6\uff0c\u53d6\u503c\u4e3a0\uff5e23<\/p>\n\n\n\n
getMinutes()\u83b7\u53d6\u5206\u949f\uff0c\u53d6\u503c\u4e3a0\uff5e59<\/p>\n\n\n\n
getSeconds()\u83b7\u53d6\u79d2\uff0c\u53d6\u503c\u4e3a0\uff5e59 <\/p>\n\n\n\n
\u9875\u9762\u663e\u793a\u65e5\u671f<\/h3>\n\n\n\n
<style>\ndiv{width:300px;\nheight:40px;\nborder:1px solid pink;\ntext-align:center;\nline-height:50px;\n}\n<\/style>\n<\/head>\n<body>\n  <div><\/div>\n  <script>\n    const div = document.querySelector('div')\n    function getMyDate() {\n      const date = new Date()\n      let h = date.getHours()\n      let m = date.getMinutes()\n      let s = date.getSeconds()\n      h = h < 10 ? '0' + h : h\n      m = m < 10 ? '0' + m : m\n      s = s < 10 ? '0' + s : s\n      return `\u4eca\u5929\u662f: ${date.getFullYear()}\u5e74${date.getMonth() + 1}\u6708${date.getDate()}\u53f7 ${h}:${m}:${s}`\n    }\n \n    div.innerHTML = getMyDate()\n    setInterval(function () {\n      div.innerHTML = getMyDate()\n    }, 1000)\n  <\/script>\n<\/body><\/code><\/pre>\n\n\n\n
\u8fd9\u662f\u81ea\u5b9a\u4e49\u683c\u5f0f\uff0c\u4e0d\u60f3\u5199\u53ef\u4ee5\u7528\u7cfb\u7edf\u7684\u3002<\/p>\n\n\n\n
<body>\n<div><\/div> \n<script>\nconst div = document.querySelector('div') \n\/\/\u5f97\u5230\u65e5\u671f\u5bf9\u8c61\nconst date = new Date()\ndiv.innerHTML = date.toLocaleString() \/\/ 2022\/4\/1 09:41:21 \nsetInterval(function () {\nconst date = new Date()\ndiv.innerHTML = date.toLocaleString() \/\/ 2022\/4\/1 09:41:21 \n},1000)\n\ndiv.innerHTML = date.toLocaLeDateString() \/\/ 2022\/4\/1 \ndiv.innerHTML = date.toLocaleTimeString() \/\/ 09:41:21 \n\n<\/script>\n<\/body> <\/code><\/pre>\n\n\n\n
\u65f6\u95f4\u6233<\/h3>\n\n\n\n
\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u7ecf\u5e38\u548c\u540e\u7aef\u5bf9\u63a5\u53e3\u7684\u65f6\u5019\u5c31\u7ecf\u5e38\u7528\u5230\u8fd9\u4e2a\u65f6\u95f4\u6233<\/p>\n\n\n\n
\u4f7f\u7528\u573a\u666f\uff1a \u5982\u679c\u8ba1\u7b97\u5012\u8ba1\u65f6\u6548\u679c\uff0c\u524d\u9762\u65b9\u6cd5\u65e0\u6cd5\u76f4\u63a5\u8ba1\u7b97\uff0c\u9700\u8981\u501f\u52a9\u4e8e\u65f6\u95f4\u6233\u5b8c\u6210
\u65f6\u95f4\u6233\uff1a\u662f\u63071970\u5e7401\u670801\u65e500\u65f600\u520600\u79d2\u8d77\u81f3\u73b0\u5728\u7684 \u6beb\u79d2\u6570 \uff0c\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8ba1\u91cf\u65f6\u95f4\u7684\u65b9\u5f0f
\u7b97\u6cd5\uff1a
\u5c06\u6765\u7684\u65f6\u95f4\u6233 - \u73b0\u5728\u7684\u65f6\u95f4\u6233 = \u5269\u4f59\u65f6\u95f4\u6beb\u79d2\u6570
\u5269\u4f59\u65f6\u95f4\u6beb\u79d2\u6570 \u8f6c\u6362\u4e3a \u5269\u4f59\u65f6\u95f4\u7684 \u5e74\u6708\u65e5\u65f6\u5206\u79d2 \u5c31\u662f \u5012\u8ba1\u65f6\u65f6\u95f4
\u6bd4\u5982\uff1a\u5c06\u6765\u65f6\u95f4\u6233 2000ms - \u73b0\u5728\u65f6\u95f4\u6233 1000ms = 1000ms\uff0c1000ms \u8f6c\u6362\u4e3a\u5c31\u662f 0\u5c0f\u65f60\u52061\u79d2 \u200b\"\"<\/p>\n\n\n\n
1. \u4f7f\u7528 getTime() \u65b9\u6cd5
const date = new Date()
console.log(date.getTime())
2.\u7b80\u5199 +new Date()<\/p>\n\n\n\n
\u91cd\u70b9\u8bb0\u4f4f +new Date()     \u56e0\u4e3a\u53ef\u4ee5\u8fd4\u56de\u5f53\u524d\u65f6\u95f4\u6233\u6216\u8005\u6307\u5b9a\u7684\u65f6\u95f4\u6233<\/p>\n\n\n\n
console.log(+new Date())
3. \u4f7f\u7528 Date.now()<\/p>\n\n\n\n
console.log(Date.now())     \u4f46\u662f\u53ea\u80fd\u5f97\u5230\u5f53\u524d\u7684\u65f6\u95f4\u6233\uff0c \u800c\u524d\u9762\u4e24\u79cd\u53ef\u4ee5\u8fd4\u56de\u6307\u5b9a\u65f6\u95f4\u7684\u65f6\u95f4\u6233<\/p>\n\n\n\n
\u6bd5\u4e1a\u5012\u8ba1\u65f6\u6548\u679c<\/h2>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n\n<head>\n    <meta charset=\"UTF-8\" \/>\n    <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\" \/>\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" <!DOCTYPE html>\n\n\n    <style>\n        .countdown {\n            width: 240px;\n            height: 305px;\n            text-align: center;\n            line-height: 1;\n            color:\n                #fff;\n            background-color:\n                brown;\n            \/* background-size: 240px; *\/\n            \/* float: Left;*\/\n            overflow: hidden;\n        }\n\n        .countdown .next {\n            font-size: 16px;\n            margin: 25px 0 14px;\n        }\n\n        .countdown .title {\n            font-size: 33px;\n        }\n\n        .countdown .tips {\n            margin-top: 80px;\n            font-size: 23px;\n        }\n\n        .countdown small {\n            font-size: 17px;\n        }\n\n        .countdown .clock {\n            width: 142px;\n            margin: 18px auto 0;\n            overflow: hidden;\n\n        }\n\n        .countdown .clock span,\n        .countdown .clock i {\n            display: block;\n            text-align: center;\n            line-height: 34px;\n            font-size: 23px;\n            float: left;\n        }\n\n        .countdown.clock span {\n            width: 34px;\n            height: 34px;\n            border-radius: 2px;\n            background-color: \u25a1#303430;\n        }\n\n        .countdown .clock i {\n            width: 20px;\n            font-style: normal;\n        }\n    <\/style>\n\n<body>\n    <div class=\"countdown\">\n        <p class=\"next\">\u4eca\u5929\u662f2222\u5e742\u670822\u65e5<\/p>\n        <p class=\"title\">\u4e0b\u73ed\u5012\u8ba1\u65f6<\/p>\n        <p class=\"clock\">\n            <span id=\"hour\">00<\/span>\n            <i>:<\/i>\n            <span id=\"minutes\">25<\/span>\n            <i>:<\/i>\n\n            <span id=\"scond\">20<\/span>\n        <\/p>\n        <p class=\"tips\">18: 30: 00\u4e0b\u8bfe<\/p>\n    <\/div>\n      <script>\n    \/\/ \u51fd\u6570\u5c01\u88c5 getCountTime\n    function getCountTime() {\n      \/\/ 1. \u5f97\u5230\u5f53\u524d\u7684\u65f6\u95f4\u6233\n      const now = +new Date()\n      \/\/ 2. \u5f97\u5230\u5c06\u6765\u7684\u65f6\u95f4\u6233\n      const last = +new Date('2022-4-1 18:30:00')\n      \/\/ console.log(now, last)\n      \/\/ 3. \u5f97\u5230\u5269\u4f59\u7684\u65f6\u95f4\u6233 count  \u8bb0\u5f97\u8f6c\u6362\u4e3a \u79d2\u6570\n      const count = (last - now) \/ 1000\n      \/\/ console.log(count)\n      \/\/ 4. \u8f6c\u6362\u4e3a\u65f6\u5206\u79d2\n      \/\/ h = parseInt(\u603b\u79d2\u6570 \/ 60 \/ 60 % 24)      \/\/ \u8ba1\u7b97\u5c0f\u65f6\n      \/\/ m = parseInt(\u603b\u79d2\u6570 \/ 60 % 60)           \/\/ \u8ba1\u7b97\u5206\u6570\n      \/\/ s = parseInt(\u603b\u79d2\u6570 % 60)                \/\/ \u8ba1\u7b97\u5f53\u524d\u79d2\u6570\n      \/\/ let d = parseInt(count \/ 60 \/ 60 \/ 24)  \/\/ \u8ba1\u7b97\u5f53\u524d\u5929\u6570\n      let h = parseInt(count \/ 60 \/ 60 % 24)\n      h = h < 10 ? '0' + h : h\n      let m = parseInt(count \/ 60 % 60)\n      m = m < 10 ? '0' + m : m\n      let s = parseInt(count % 60)\n      s = s < 10 ? '0' + s : s\n      console.log(h, m, s)\n \n      \/\/ \u628a\u65f6\u5206\u79d2\u5199\u5230\u5bf9\u5e94\u7684\u76d2\u5b50\u91cc\u9762\n      document.querySelector('#hour').innerHTML = h\n      document.querySelector('#minutes').innerHTML = m\n      document.querySelector('#scond').innerHTML = s\n    }\n    \/\/ \u5148\u8c03\u7528\u4e00\u6b21\n    getCountTime()\n \n    \/\/ \u5f00\u542f\u5b9a\u65f6\u5668\n    setInterval(getCountTime, 1000)\n  <\/script>\n<\/body>\n\n<\/html><\/code><\/pre>\n\n\n\n
\u6dfb\u52a0\u968f\u673a\u989c\u8272<\/p>\n\n\n\n
DOM\u8282\u70b9\u64cd\u4f5c<\/h1>\n\n\n\n
DOM\u8282\u70b9\uff1a<\/strong>DOM\u6811\u91cc\u6bcf\u4e00\u4e2a\u5185\u5bb9\u90fd\u79f0\u4e4b\u4e3a\u8282\u70b9<\/p>\n\n\n\n
\u5143\u7d20\u8282\u70b9\uff1a<\/strong> \u6240\u6709\u7684\u6807\u7b7e \u6bd4\u5982 body\u3001 div\uff0chtml \u662f\u6839\u8282\u70b9<\/p>\n\n\n\n
\u5c5e\u6027\u8282\u70b9\uff1a\u6240\u6709\u7684\u5c5e\u6027 \u6bd4\u5982 href<\/p>\n\n\n\n
\u6587\u672c\u8282\u70b9\uff1a\u6240\u6709\u7684\u6587\u672c
 \u200b\"\"<\/p>\n\n\n\n
 \u67e5\u627e\u7236\u7ed3\u70b9<\/h3>\n\n\n\n
 \u8fd9\u662f\u4e3e\u4e86\u4f8b\u5b50\uff0cXX.parentNode\u5373\u53ef\u83b7\u5f97\u8fd9\u4e2a\u7236\u5bf9\u8c61<\/p>\n\n\n\n
<body>\n<div class=\"yeye\">\n<div class=\"dad\">\n<div class=\"baby\">x<\/div>\n<\/div>\n<\/div>\n<script>\nconst baby = document.querySelector('.baby')\nconsole.log(baby)\/\/\u8fd4\u56dedom\nconsole.log(baby.parentNode)\/\/\u8fd4\u56dedom\u5bf9\u8c61\nconsole.log(baby.parentNode.parentNode)\/\/\u8fd4\u56dedom\u5bf9\u8c61\n<\/script>\n<\/body><\/code><\/pre>\n\n\n\n
<body>\n<div class=\"box\">\n\u6211\u662f\u5e7f\u544a\n<div class=\"box1\">X<\/div>\n<\/div>\n<div class=\"box\">\n\u6211\u662f\u5e7f\u544a\n<div class=\"box1\">X<\/div>\n<\/div>\n<script>\nconst closeBtn = document.querySelectorAll('.box1')\nfor (let i = 0; i < closeBtn.length; i+) {\ncloseBtn[i].addEventlistener('click', function\uff08){\nthis. parentNode. style.display = 'none'\n})\n\n<\/script>\n<\/body><\/code><\/pre>\n\n\n\n
\u5b50\u8282\u70b9<\/h3>\n\n\n\n
childNodes \u5c5e\u6027\uff0c\u83b7\u5f97\u6240\u6709\u5b50\u8282\u70b9\u3001\u5305\u62ec\u6587\u672c\u8282\u70b9\uff08\u7a7a\u683c\u3001\u6362\u884c\uff09\u3001\u6ce8\u91ca\u8282\u70b9\u7b49               children \u5c5e\u6027\uff08\u91cd\u70b9\uff09<\/strong> \u4ec5\u83b7\u5f97\u6240\u6709\u5143\u7d20\u8282\u70b9\uff0c\u8fd4\u56de\u7684\u8fd8\u662f\u4e00\u4e2a \u4f2a\u6570\u7ec4\uff0c \u4f8b\u5982\uff1a\u7236\u5143\u7d20.children<\/p>\n\n\n\n
\u5144\u5f1f\u8282\u70b9<\/h3>\n\n\n\n
1. \u4e0b\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9\uff1a nextElementSibling \u5c5e\u6027
2. \u4e0a\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9\uff1a previousElementSibling \u5c5e\u6027<\/p>\n\n\n\n
\u589e\u52a0\u8282\u70b9<\/h2>\n\n\n\n
document.createElement('\u6807\u7b7e\u540d')<\/strong><\/p>\n\n\n\n
\u8ffd\u52a0\u8282\u70b9<\/p>\n\n\n\n
\u8981\u60f3\u5728\u754c\u9762\u770b\u5230\uff0c\u8fd8\u5f97\u63d2\u5165\u5230\u67d0\u4e2a\u7236\u5143\u7d20\u4e2d
\uff081\uff09 \u63d2\u5165\u5230\u7236\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20\uff1a \u7236\u5143\u7d20.appendChild(\u8981\u63d2\u5165\u7684\u5143\u7d20)
\uff082\uff09\u63d2\u5165\u5230\u7236\u5143\u7d20\u4e2d\u67d0\u4e2a\u5b50\u5143\u7d20\u7684\u524d\u9762\uff1a\u7236\u5143\u7d20.insertBefore(\u8981\u63d2\u5165\u7684\u5143\u7d20,\u5728\u54ea\u4e2a\u5143\u7d20\u524d\u9762)<\/p>\n\n\n\n
\u4f60\u4eec\u9519\u4e86\uff0c\u5176\u5b9e\u8fd9\u79cd\u65b9\u5f0f\u5f00\u53d1\u4e2d\u5f88\u5c11\u7528\uff0c\u90fd\u662f\u7528\u6846\u67b6<\/p>\n\n\n\n
\u6700\u5f00\u59cb\u6ca1\u6709\u5143\u7d20\u4f1a\u5f97\u5230\u4e00\u4e2a\u7a7a\u6570\u7ec4\uff0c\u7a7a\u6570\u7ec4[0]\u8fd4\u56deundefined \u7136\u540e\u4f60\u7ee7\u7eed\u7528insertBefore \u4e5f\u4e0d\u4f1a\u62a5\u9519\u7684\uff0c\u521a\u521a\u8bd5\u8fc7\u4e86\uff0c\u6700\u5f00\u59cb\u6ca1\u6709\u4e5f\u4e0d\u4f1a\u62a5\u9519<\/p>\n\n\n\n
\u5b66\u6210\u5728\u7ebf\u6848\u4f8b\u6e32\u67d3<\/h2>\n\n\n\n
\u7f3a\u5c11\u6e90\u7801...\uff1f<\/p>\n\n\n\n
\u514b\u9686\u8282\u70b9\u548c\u5220\u9664\u8282\u70b9<\/h1>\n\n\n\n
\u5143\u7d20.cloneNode(\u5e03\u5c14\u503c)<\/p>\n\n\n\n
\u7279\u6b8a\u60c5\u51b5\u4e0b\u6211\u4eec\u65b0\u589e\u8282\u70b9\u6309\u5982\u4e0b\u64cd\u4f5c\uff1a\u00a0 \u00a0 \u00a0 \u00a0  1.\u590d\u5236\u4e00\u4e2a\u539f\u6709\u7684\u8282\u70b9\u00a0 2.\u628a\u590d\u5236\u7684\u8282\u70b9\u653e\u5230\u6307\u5b9a\u7684\u5143\u7d20\u5185\u90e8
cloneNode\u4f1a\u514b\u9686\u51fa\u4e00\u4e2a\u8ddf\u539f\u6807\u7b7e\u4e00\u6837\u7684\u5143\u7d20\uff0c\u62ec\u53f7\u5185\u4f20\u5165\u5e03\u5c14\u503c\u3002<\/p>\n\n\n\n
\u82e5\u4e3atrue\uff0c\u5219\u514b\u9686\u65f6\u4f1a\u5305\u542b\u540e\u4ee3\u8282\u70b9\u4e00\u8d77\u514b\u9686\u3002\u00a0 \u00a0\u82e5\u4e3afalse(\u9ed8\u8ba4)\uff0c\u5219\u514b\u9686\u65f6\u4e0d\u5305\u542b\u540e\u4ee3\u8282\u70b9\u3002<\/p>\n\n\n\n
 \u6df1\u62f7\u8d1d\u4e0e\u6d45\u62f7\u8d1d<\/strong><\/p>\n\n\n\n
<body>\n<ul>\n<li>1<\/li>\n<li>2<\/li>\n<li>3<\/li>\n<\/ul>\n<script>\nconst ul = document.querySelector('ul')\n\/\/1\u514b\u9686\u8282\u70b9\u5143\u7d20.cloneNode(true)\n\/\/ const li1 = ul.children[0].cloneNode(true)\n\/\/ console.log(li1)\n\/\/2\uff0c\u8ffd\u52a0\nul.appendChild(ul.children[0].cloneNode(true))\n<\/script>\n<\/body><\/code><\/pre>\n\n\n\n
\u5728 JavaScript \u539f\u751f DOM \u64cd\u4f5c\u4e2d\uff0c\u8981\u5220\u9664\u5143\u7d20\u5fc5\u987b\u901a\u8fc7 \u7236\u5143\u7d20\u5220\u9664\u3002
\u8bed\u6cd5\uff1a \u7236\u5143\u7d20.removeChlid(\u5b50\u5143\u7d20)\uff0c \u5982\u4e0d\u5b58\u5728\u7236\u5b50\u5173\u7cfb\u5219\u5220\u9664\u4e0d\u6210\u529f
\u5220\u9664\u8282\u70b9\u548c\u9690\u85cf\u8282\u70b9\uff08display:none\uff09 \u662f\u6709\u533a\u522b\u7684\uff1a
\u9690\u85cf\u8282\u70b9\u8fd8\u662f\u5b58\u5728\u7684\uff0c\u4f46\u662f\u5220\u9664\uff0c\u5219\u4ecehtml\u4e2d\u5220\u9664\u8282\u70b9<\/s>\u663e\u7136\u7684<\/p>\n\n\n\n
Mobile\u7aef\u4e8b\u4ef6<\/h1>\n\n\n\n
\u76ee\u6807\uff1a\u4e86\u89e3M\u7aef\u5e38\u89c1\u7684\u4e8b\u4ef6
\u79fb\u52a8\u7aef\u4e5f\u6709\u81ea\u5df1\u72ec\u7279\u7684\u5730\u65b9\u3002\u6bd4\u5982\u89e6\u5c4f\u4e8b\u4ef6touch \uff08\u4e5f\u79f0\u89e6\u6478\u4e8b\u4ef6\uff09\uff0cAndroid\u548cIOS\u90fd\u6709\u3002
\u2022 \u89e6\u5c4f\u4e8b\u4ef6touch \uff08\u4e5f\u79f0\u89e6\u6478\u4e8b\u4ef6\uff09\uff0cAndroid\u548cIOS\u90fd\u6709\u3002
\u2022 touch\u5bf9\u8c61\u4ee3\u8868\u4e00\u4e2a\u89e6\u6478\u70b9\u3002\u89e6\u6478\u70b9\u53ef\u80fd\u662f\u4e00\u6839\u624b\u6307\uff0c\u4e5f\u53ef\u80fd\u662f\u4e00\u6839\u89e6\u6478\u7b14\u3002\u89e6\u5c4f\u4e8b\u4ef6\u53ef\u54cd\u5e94\u7528\u6237\u624b\u6307\uff08\u6216\u89e6\u63a7\u7b14\uff09<\/p>\n\n\n\n
\u5bf9\u5c4f\u5e55\u6216\u8005\u89e6\u63a7\u677f\u64cd\u4f5c\u3002
\u2022\u5e38\u89c1\u7684\u89e6\u5c4f\u4e8b\u4ef6\u5982\u4e0b\uff1a
\u89e6\u5c4ftouch\u4e8b\u4ef6 \u8bf4\u660e
touchstart \" \u624b\u6307\u5230\u4e00\u4e2aDOM\u5143\u7d20\u65f6\u89e6\u53d1
touchmove \u624b\u6307\u5728\u4e00\u4e2aDOM\u5143\u7d20\u4e0a\u6ed1\u52a8\u65f6\u89e6\u53d1
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\u5b66\u4e60\u8f6e\u64ad \u63d2\u4ef6\u7684\u57fa\u672c\u8fc7\u7a0b
1. \u719f\u6089\u5b98\u7f51\uff0c\u4e86\u89e3\u8fd9\u4e2a\u63d2\u4ef6\u53ef\u4ee5\u5b8c\u6210\u4ec0\u4e48\u9700\u6c42   https:\/\/www.swiper.com.cn\/
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3. \u67e5\u770b\u57fa\u672c\u4f7f\u7528\u6d41\u7a0b    https:\/\/www.swiper.com.cn\/usage\/index.html
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\u4e0b\u8f7d\u597d\u540e\uff0c\u6253\u5f00package..............<\/p>\n\n\n\n
P123 \u200b<\/p>\n\n\n\n
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