{"id":435,"date":"2024-10-25T11:41:40","date_gmt":"2024-10-25T03:41:40","guid":{"rendered":"https:\/\/eve2333.top\/?p=435"},"modified":"2024-10-25T11:41:40","modified_gmt":"2024-10-25T03:41:40","slug":"javascript-api%e5%ad%a6%e4%b9%a0-part-5","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=435","title":{"rendered":"Javascript api\u5b66\u4e60 part-5"},"content":{"rendered":"\n

\u5b66\u751f\u4fe1\u606f\u7ba1\u7406\u7cfb\u7edf<\/h1>\n\n\n\n

\u73b0\u5728\u7740\u6025\u6ca1\u770b.....<\/p>\n\n\n\n

<!DOCTYPE html>\n<html lang=\"en\">\n \n<head>\n    <meta charset=\"UTF-8\" \/>\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/>\n    <meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\" \/>\n    <title>\u5b66\u751f\u4fe1\u606f\u7ba1\u7406<\/title>\n    <link rel=\"stylesheet\" href=\"css\/index.css\" \/>\n<\/head>\n \n<body>\n    <h1>\u65b0\u589e\u5b66\u5458<\/h1>\n    <form class=\"info\" autocomplete=\"off\">\n        \u59d3\u540d\uff1a<input type=\"text\" class=\"uname\" name=\"uname\" \/>\n        \u5e74\u9f84\uff1a<input type=\"text\" class=\"age\" name=\"age\" \/>\n        \u6027\u522b:\n        <select name=\"gender\" class=\"gender\">\n            <option value=\"\u7537\">\u7537<\/option>\n            <option value=\"\u5973\">\u5973<\/option>\n        <\/select>\n        \u85aa\u8d44\uff1a<input type=\"text\" class=\"salary\" name=\"salary\" \/>\n        \u5c31\u4e1a\u57ce\u5e02\uff1a<select name=\"city\" class=\"city\">\n            <option value=\"\u5317\u4eac\">\u5317\u4eac<\/option>\n            <option value=\"\u4e0a\u6d77\">\u4e0a\u6d77<\/option>\n            <option value=\"\u5e7f\u5dde\">\u5e7f\u5dde<\/option>\n            <option value=\"\u6df1\u5733\">\u6df1\u5733<\/option>\n            <option value=\"\u66f9\u53bf\">\u66f9\u53bf<\/option>\n        <\/select>\n        <button class=\"add\">\u5f55\u5165<\/button>\n    <\/form>\n \n    <h1>\u5c31\u4e1a\u699c<\/h1>\n    <table>\n        <thead>\n            <tr>\n                <th>\u5b66\u53f7<\/th>\n                <th>\u59d3\u540d<\/th>\n                <th>\u5e74\u9f84<\/th>\n                <th>\u6027\u522b<\/th>\n                <th>\u85aa\u8d44<\/th>\n                <th>\u5c31\u4e1a\u57ce\u5e02<\/th>\n                <th>\u64cd\u4f5c<\/th>\n            <\/tr>\n        <\/thead>\n        <tbody>\n            <!-- \n        <tr>\n          <td>1001<\/td>\n          <td>\u6b27\u9633\u9738\u5929<\/td>\n          <td>19<\/td>\n          <td>\u7537<\/td>\n          <td>15000<\/td>\n          <td>\u4e0a\u6d77<\/td>\n          <td>\n            <a href=\"javascript:\">\u5220\u9664<\/a>\n          <\/td>\n        <\/tr> \n        -->\n        <\/tbody>\n    <\/table>\n    <script>\n        \/\/ \u83b7\u53d6\u5143\u7d20\n        const uname = document.querySelector('.uname')\n        const age = document.querySelector('.age')\n        const gender = document.querySelector('.gender')\n        const salary = document.querySelector('.salary')\n        const city = document.querySelector('.city')\n        const tbody = document.querySelector('tbody')\n        \/\/ \u83b7\u53d6\u6240\u6709\u5e26\u6709name\u5c5e\u6027\u7684\u5143\u7d20\n        const items = document.querySelectorAll('[name]')\n        \/\/ \u58f0\u660e\u4e00\u4e2a\u7a7a\u7684\u6570\u7ec4\uff0c \u589e\u52a0\u548c\u5220\u9664\u90fd\u662f\u5bf9\u8fd9\u4e2a\u6570\u7ec4\u8fdb\u884c\u64cd\u4f5c\n        const arr = []\n        \/\/ 1. \u5f55\u5165\u6a21\u5757\n        \/\/ 1.1 \u8868\u5355\u63d0\u4ea4\u4e8b\u4ef6\n        const info = document.querySelector('.info')\n        info.addEventListener('submit', function (e) {\n            \/\/ \u963b\u6b62\u9ed8\u8ba4\u884c\u4e3a \u4e0d\u8df3\u8f6c\n            e.preventDefault()\n \n            \/\/ \u8fd9\u91cc\u8fdb\u884c\u8868\u5355\u9a8c\u8bc1  \u5982\u679c\u4e0d\u901a\u8fc7\uff0c\u76f4\u63a5\u4e2d\u65ad\uff0c\u4e0d\u9700\u8981\u6dfb\u52a0\u6570\u636e\n            \/\/ \u5148\u904d\u5386\u5faa\u73af\n            for (let i = 0; i < items.length; i++) {\n                if (items[i].value === '') {\n                    return alert('\u8f93\u5165\u5185\u5bb9\u4e0d\u80fd\u4e3a\u7a7a')\n                }\n            }\n \n            \/\/ \u521b\u5efa\u65b0\u7684\u5bf9\u8c61\n            const obj = {\n                stuId: arr.length + 1,\n                uname: uname.value,\n                age: age.value,\n                gender: gender.value,\n                salary: salary.value,\n                city: city.value\n            }\n            \/\/ console.log(obj)\n            \/\/ \u8ffd\u52a0\u7ed9\u6570\u7ec4\u91cc\u9762\n            arr.push(obj)\n            \/\/ \u6e05\u7a7a\u8868\u5355   reset\u91cd\u7f6e\n            this.reset()\n            \/\/ \u8c03\u7528\u6e32\u67d3\u51fd\u6570\n            render()\n        })\n \n        \/\/ 2.\u6e32\u67d3\u51fd\u6570 \u56e0\u4e3a\u589e\u52a0\u548c\u5220\u9664\u90fd\u9700\u8981\u6e32\u67d3\n        function render() {\n            \/\/ \u5148\u6e05\u7a7atbody\u4ee5\u524d\u7684\u884c\uff0c\u628a\u6700\u65b0\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u6e32\u67d3\u5b8c\u6bd5\n            tbody.innerHTML = ''\n            \/\/ \u904d\u5386arr\u6570\u7ec4\n            for (let i = 0; i < arr.length; i++) {\n                \/\/ \u751f\u6210tr\n                const tr = document.createElement('tr')\n                tr.innerHTML = `\n                    <td>${arr[i].stuId}<\/td>\n                    <td>${arr[i].uname}<\/td>\n                    <td>${arr[i].age}<\/td>\n                    <td>${arr[i].gender}<\/td>\n                    <td>${arr[i].salary}<\/td>\n                    <td>${arr[i].city}<\/td>\n                    <td>\n                        <a href=\"javascript:\" date-id=${i}>\u5220\u9664<\/a>\n                    <\/td>\n                `\n                \/\/ \u8ffd\u52a0\u5143\u7d20  \u7236\u5143\u7d20.appendChild(\u5b50\u5143\u7d20)\n                tbody.appendChild(tr)\n            }\n        }\n \n        \/\/ 3.\u5220\u9664\u64cd\u4f5c\n        \/\/ 3.1 \u4e8b\u4ef6\u59d4\u6258 tbody\n        tbody.addEventListener('click', function (e) {\n            if (e.target.tagName === 'A') {\n                \/\/ \u81ea\u5df1\u7684\u60f3\u6cd5 \u4e0d\u5229\u7528\u81ea\u5b9a\u4e49\u5c5e\u6027\n                \/\/ arr.splice(e.target.stuId - 1, 1)\n                \/\/ \u5f97\u5230\u5f53\u524d\u5143\u7d20\u7684\u81ea\u5b9a\u4e49\u5c5e\u6027 data-id\n                \/\/ \u5220\u9664arr\u6570\u7ec4\u5bf9\u5e94\u7684\u6570\u636e\n                arr.splice(e.target.dataset.id, 1)\n                \/\/ \u91cd\u65b0\u6e32\u67d3\n                render()\n            }\n        })\n    <\/script>\n \n<\/body>\n \n<\/html><\/code><\/pre>\n\n\n\n
\u91cd\u7ed8\u548c\u56de\u6d41<\/h2>\n\n\n\n
1. \u6d4f\u89c8\u5668\u662f\u5982\u4f55\u8fdb\u884c\u754c\u9762\u6e32\u67d3\u7684\uff1f
a.\u89e3\u6790\uff08Parser\uff09HTML\uff0c\u751f\u6210DOM\u6811(DOM Tree)
b.\u540c\u65f6\u89e3\u6790\uff08Parser\uff09 CSS\uff0c\u751f\u6210\u6837\u5f0f\u89c4\u5219 (Style Rules)
c.\u6839\u636eDOM\u6811\u548c\u6837\u5f0f\u89c4\u5219\uff0c\u751f\u6210\u6e32\u67d3\u6811(Render Tree)
d.\u8fdb\u884c\u5e03\u5c40 Layout(\u56de\u6d41\/\u91cd\u6392):\u6839\u636e\u751f\u6210\u7684\u6e32\u67d3\u6811\uff0c\u5f97\u5230\u8282\u70b9\u7684\u51e0\u4f55\u4fe1\u606f\uff08\u4f4d\u7f6e\uff0c\u5927\u5c0f\uff09
e.\u8fdb\u884c\u7ed8\u5236 Painting(\u91cd\u7ed8): \u6839\u636e\u8ba1\u7b97\u548c\u83b7\u53d6\u7684\u4fe1\u606f\u8fdb\u884c\u6574\u4e2a\u9875\u9762\u7684\u7ed8\u5236
f.Display: \u5c55\u793a\u5728\u9875\u9762\u4e0a
\u56de\u6d41(\u91cd\u6392)
\u5f53 Render Tree \u4e2d\u90e8\u5206\u6216\u8005\u5168\u90e8\u5143\u7d20\u7684\u5c3a\u5bf8\u3001\u7ed3\u6784\u3001\u5e03\u5c40\u7b49\u53d1\u751f\u6539\u53d8\u65f6\uff0c\u6d4f\u89c8\u5668\u5c31\u4f1a\u91cd\u65b0\u6e32\u67d3\u90e8\u5206\u6216\u5168\u90e8\u6587\u6863\u7684\u8fc7\u7a0b\u79f0\u4e3a \u56de\u6d41 \u3002
\u91cd\u7ed8
\u7531\u4e8e\u8282\u70b9(\u5143\u7d20)\u7684\u6837\u5f0f\u7684\u6539\u53d8\u5e76\u4e0d\u5f71\u54cd\u5b83\u5728\u6587\u6863\u6d41\u4e2d\u7684\u4f4d\u7f6e\u548c\u6587\u6863\u5e03\u5c40\u65f6(\u6bd4\u5982\uff1acolor\u3001background-color\u3001outline\u7b49)\uff0c\u79f0\u4e3a \u91cd\u7ed8 \u3002
\u91cd\u7ed8\u4e0d\u4e00\u5b9a\u5f15\u8d77\u56de\u6d41\uff0c\u800c\u56de\u6d41\u4e00\u5b9a\u4f1a\u5f15\u8d77\u91cd\u7ed8\u3002<\/p>\n\n\n\n
windows\u5bf9\u8c61<\/h1>\n\n\n\n
Bom--\u6d4f\u89c8\u5668\u5bf9\u8c61\u6a21\u578b<\/h3>\n\n\n\n
\u200b\"\"<\/p>\n\n\n\n
\u25cf window\u5bf9\u8c61\u662f\u4e00\u4e2a\u5168\u5c40\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u8bf4\u662fJavaScript\u4e2d\u7684\u9876\u7ea7\u5bf9\u8c61
\u25cf \u50cfdocument\u3001alert()\u3001console.log()\u8fd9\u4e9b\u90fd\u662fwindow\u7684\u5c5e\u6027,\u57fa\u672cBOM\u5c5e\u6027\u548c\u65b9\u6cd5\u90fd\u662fwindow\u7684
\u25cf \u6240\u6709\u901a\u8fc7var\u5b9a\u4e49\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u3001\u51fd\u6570\u90fd\u4f1a\u53d8\u6210window\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5
\u25cf window\u5bf9\u8c61\u4e0b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u8c03\u7528\u7684\u65f6\u5019\u53ef\u4ee5\u7701\u7565window<\/p>\n\n\n\n
\u5b9a\u65f6\u5668-\u5ef6\u65f6\u51fd\u6570<\/h3>\n\n\n\n
JavaScript \u5185\u7f6e\u7684\u4e00\u4e2a\u7528\u6765\u8ba9\u4ee3\u7801\u5ef6\u8fdf\u6267\u884c\u7684\u51fd\u6570\uff0c\u53eb  setTimeout
\u8bed\u6cd5\uff1a setTimeout(\u56de\u8c03\u51fd\u6570,\u7b49\u5f85\u7684\u6beb\u79d2\u6570)
setTimeout \u4ec5\u4ec5\u53ea\u6267\u884c\u4e00\u6b21\uff0c\u6240\u4ee5\u53ef\u4ee5\u7406\u89e3\u4e3a\u5c31\u662f\u628a\u4e00\u6bb5\u4ee3\u7801\u5ef6\u8fdf\u6267\u884c, \u5e73\u65f6\u7701\u7565window
\u6e05\u9664\u5ef6\u65f6\u51fd\u6570 \uff1a
let timer = setTimeout(\u56de\u8c03\u51fd\u6570,\u7b49\u5f85\u7684\u6beb\u79d2\u6570)
clearTimeout(timer)
\u6ce8\u610f\u70b9\uff1a
1.\u5ef6\u65f6\u5668\u9700\u8981\u7b49\u5f85,\u6240\u4ee5\u540e\u9762\u7684\u4ee3\u7801\u5148\u6267\u884c
2. \u6bcf\u4e00\u6b21\u8c03\u7528\u5ef6\u65f6\u5668\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u5ef6\u65f6\u5668
\u4e24\u79cd\u5b9a\u65f6\u5668\u5bf9\u6bd4\uff1a \u6267\u884c\u7684\u6b21\u6570
\u25cf \u5ef6\u65f6\u51fd\u6570: \u6267\u884c\u4e00\u6b21
\u25cf \u95f4\u6b47\u51fd\u6570:\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u6267\u884c\u4e00\u6b21\uff0c\u9664\u975e\u624b\u52a8\u6e05\u9664<\/p>\n\n\n\n
5\u79d2\u6d88\u5931\u7684\u5e7f\u544a<\/h4>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n\n<head>\n    <meta charset=\"UTF-8\" \/>\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/>\n    <meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\" \/>\n    <title>\u5b66\u751f\u4fe1\u606f\u7ba1\u7406<\/title>\n    <link rel=\"stylesheet\" href=\"css\/index.css\" \/>\n<\/head>\n\n<style>\n    img {\n        position: fixed;\n        left: 0;\n        bottom: 0;\n    }\n<\/style>\n<\/head>\n\n<body>\n    <img src=\".\/images\/ad.png\" alt=\"\">\n    <script>\n        \/\/ 1.\u83b7\u53d6\u5143\u7d20\n        const img = document.querySelector('img')\n        setTimeout(function () {\n            img.style.display = 'none'\n        }, 5000)\n    <\/script>\n<\/body>\n\n<\/body>\n\n<\/html><\/code><\/pre>\n\n\n\n
js\u6267\u884c\u673a\u5236\uff08P127\u61d2\u5f97\u542c\uff09<\/h1>\n\n\n\n
JavaScript \u8bed\u8a00\u7684\u4e00\u5927\u7279\u70b9\u5c31\u662f\u5355\u7ebf\u7a0b\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u540c\u4e00\u4e2a\u65f6\u95f4\u53ea\u80fd\u505a\u4e00\u4ef6\u4e8b\u3002<\/p>\n\n\n\n
\u8fd9\u662f\u56e0\u4e3a Javascript \u8fd9\u95e8\u811a\u672c\u8bed\u8a00\u8bde\u751f\u7684\u4f7f\u547d\u6240\u81f4\u2014\u2014JavaScript \u662f\u4e3a\u5904\u7406\u9875\u9762\u4e2d\u7528\u6237\u7684\u4ea4\u4e92\uff0c\u4ee5\u53ca\u64cd\u4f5c DOM \u800c\u8bde\u751f\u7684\u3002\u6bd4\u5982\u6211\u4eec\u5bf9\u67d0\u4e2a DOM \u5143\u7d20\u8fdb\u884c\u6dfb\u52a0\u548c\u5220\u9664\u64cd\u4f5c\uff0c\u4e0d\u80fd\u540c\u65f6\u8fdb\u884c\u3002 \u5e94\u8be5\u5148\u8fdb\u884c\u6dfb\u52a0\uff0c\u4e4b\u540e\u518d\u5220\u9664\u3002
\u5355\u7ebf\u7a0b\u5c31\u610f\u5473\u7740\uff0c\u6240\u6709\u4efb\u52a1\u9700\u8981\u6392\u961f\uff0c\u524d\u4e00\u4e2a\u4efb\u52a1\u7ed3\u675f\uff0c\u624d\u4f1a\u6267\u884c\u540e\u4e00\u4e2a\u4efb\u52a1\u3002\u8fd9\u6837\u6240\u5bfc\u81f4\u7684\u95ee\u9898\u662f\uff1a\u5982\u679c JS \u6267\u884c\u7684\u65f6\u95f4\u8fc7\u957f\uff0c\u8fd9\u6837\u5c31\u4f1a\u9020\u6210\u9875\u9762\u7684\u6e32\u67d3\u4e0d\u8fde\u8d2f\uff0c\u5bfc\u81f4\u9875\u9762\u6e32\u67d3\u52a0\u8f7d\u963b\u585e\u7684\u611f\u89c9\u3002
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u5229\u7528\u591a\u6838 CPU \u7684\u8ba1\u7b97\u80fd\u529b\uff0cHTML5 \u63d0\u51fa Web Worker \u6807\u51c6\uff0c\u5141\u8bb8 JavaScript \u811a\u672c\u521b\u5efa\u591a\u4e2a\u7ebf\u7a0b\u3002\u4e8e\u662f\uff0cJS \u4e2d\u51fa\u73b0\u4e86 \u540c\u6b65 \u548c \u5f02\u6b65\u3002
\u540c\u6b65
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\u5f02\u6b65
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\u540c\u6b65\u4efb\u52a1\u90fd\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\uff0c\u5f62\u6210\u4e00\u4e2a \u6267\u884c\u6808\u3002
\u5f02\u6b65\u4efb\u52a1
JS \u7684\u5f02\u6b65\u662f\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u5b9e\u73b0\u7684\u3002
\u4e00\u822c\u800c\u8a00\uff0c\u5f02\u6b65\u4efb\u52a1\u6709\u4ee5\u4e0b\u4e09\u79cd\u7c7b\u578b:
1\u3001\u666e\u901a\u4e8b\u4ef6\uff0c\u5982 click\u3001resize \u7b49
2\u3001\u8d44\u6e90\u52a0\u8f7d\uff0c\u5982 load\u3001error \u7b49
3\u3001\u5b9a\u65f6\u5668\uff0c\u5305\u62ec setInterval\u3001setTimeout \u7b49
\u5f02\u6b65\u4efb\u52a1\u76f8\u5173\u6dfb\u52a0\u5230 \u4efb\u52a1\u961f\u5217 \u4e2d\uff08\u4efb\u52a1\u961f\u5217\u4e5f\u79f0\u4e3a\u6d88\u606f\u961f\u5217\uff09\u3002
JS \u6267\u884c\u673a\u5236
1. \u5148\u6267\u884c \u6267\u884c\u6808\u4e2d\u7684\u540c\u6b65\u4efb\u52a1 \u3002
2 . \u5f02\u6b65\u4efb\u52a1\u653e\u5165\u4efb\u52a1\u961f\u5217\u4e2d\u3002
3. \u4e00\u65e6\u6267\u884c\u6808\u4e2d\u7684\u6240\u6709\u540c\u6b65\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u7cfb\u7edf\u5c31\u4f1a\u6309\u6b21\u5e8f\u8bfb\u53d6 \u4efb\u52a1\u961f\u5217 \u4e2d\u7684\u5f02\u6b65\u4efb\u52a1\uff0c\u4e8e\u662f\u88ab\u8bfb\u53d6\u7684\u5f02\u6b65\u4efb\u52a1\u7ed3\u675f\u7b49\u5f85\u72b6\u6001\uff0c\u8fdb\u5165\u6267\u884c\u6808\uff0c\u5f00\u59cb\u6267\u884c\u3002 \u200b<\/p>\n\n\n
\n
\"\"<\/figure>\n<\/div>\n\n\n
\"\"<\/figure>\n\n\n\n
location\u5bf9\u8c61<\/h1>\n\n\n\n
location \u7684\u6570\u636e\u7c7b\u578b\u662f\u5bf9\u8c61\uff0c\u5b83\u62c6\u5206\u5e76\u4fdd\u5b58\u4e86 URL \u5730\u5740\u7684\u5404\u4e2a\u7ec4\u6210\u90e8\u5206\u3002
\u5e38\u7528\u5c5e\u6027\u548c\u65b9\u6cd5\uff1a
\u25cf href \u5c5e\u6027\u83b7\u53d6\u5b8c\u6574\u7684 URL \u5730\u5740\uff0c\u5bf9\u5176\u8d4b\u503c\u65f6\u7528\u4e8e\u5730\u5740\u7684\u8df3\u8f6c<\/p>\n\n\n\n
<style>\n\n<\/style>\n<\/head>\n<body>\n  <a href=\"http:\/\/www.itcast.cn\">\u652f\u4ed8\u6210\u529f<span>5<\/span>\u79d2\u949f\u4e4b\u540e\u8df3\u8f6c\u5230\u9996\u9875<\/a>\n  <script>\n    \/\/ 1. \u83b7\u53d6\u5143\u7d20\n    const a = document.querySelector('a')\n    \/\/ 2.\u5f00\u542f\u5b9a\u65f6\u5668\n    \/\/ 3. \u58f0\u660e\u5012\u8ba1\u65f6\u53d8\u91cf\n    let num = 5\n    let timerId = setInterval(function () {\n      num--\n      a.innerHTML = `\u652f\u4ed8\u6210\u529f<span>${num}<\/span>\u79d2\u949f\u4e4b\u540e\u8df3\u8f6c\u5230\u9996\u9875`\n      \/\/ \u5982\u679cnum === 0 \u5219\u505c\u6b62\u5b9a\u65f6\u5668\uff0c\u5e76\u4e14\u5b8c\u6210\u8df3\u8f6c\u529f\u80fd\n      if (num === 0) {\n        clearInterval(timerId)\n        \/\/ 4. \u8df3\u8f6c  location.href\n        location.href = 'http:\/\/www.itcast.cn'\n      }\n    }, 1000)\n  <\/script>\n<\/body><\/code><\/pre>\n\n\n\n
\u25cf search \u5c5e\u6027\u83b7\u53d6\u5730\u5740\u4e2d\u643a\u5e26\u7684\u53c2\u6570\uff0c\u7b26\u53f7 \uff1f\u540e\u9762\u90e8\u5206
\u25cf location.hash \u5c5e\u6027\u83b7\u53d6\u5730\u5740\u4e2d\u7684\u5565\u5e0c\u503c\uff0c\u7b26\u53f7 # \u540e\u9762\u90e8\u5206\uff0c\u7ecf\u5e38\u7528\u4e8e\u4e0d\u5237\u65b0\u9875\u9762\uff0c\u663e\u793a\u4e0d\u540c\u9875\u9762\uff0c\u6bd4\u5982 \u7f51\u6613\u4e91\u97f3\u4e50<\/p>\n\n\n\n
\u5c06\u7528\u4e8evue\u8def\u7531<\/p>\n\n\n\n
\u25cf reload \u65b9\u6cd5\u7528\u6765\u5237\u65b0\u5f53\u524d\u9875\u9762\uff0c\u4f20\u5165\u53c2\u6570 true \u65f6\u8868\u793a\u5f3a\u5236\u5237\u65b0\uff0c\u5982\uff1alocation.reload(true)<\/p>\n\n\n\n
navigator<\/h3>\n\n\n\n
\u7684\u6570\u636e\u7c7b\u578b\u662f\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u4e0b\u8bb0\u5f55\u4e86\u6d4f\u89c8\u5668\u81ea\u8eab\u7684\u76f8\u5173\u4fe1\u606f
\u5e38\u7528\u5c5e\u6027\u548c\u65b9\u6cd5\uff1a \u901a\u8fc7 userAgent \u68c0\u6d4b\u6d4f\u89c8\u5668\u7684\u7248\u672c\u53ca\u5e73\u53f0<\/p>\n\n\n\n
histroy\u5bf9\u8c61<\/h3>\n\n\n\n
history \u7684\u6570\u636e\u7c7b\u578b\u662f\u5bf9\u8c61\uff0c\u4e3b\u8981\u7ba1\u7406\u5386\u53f2\u8bb0\u5f55\uff0c \u8be5\u5bf9\u8c61\u4e0e\u6d4f\u89c8\u5668\u5730\u5740\u680f\u7684\u64cd\u4f5c\u76f8\u5bf9\u5e94\uff0c\u5982\u524d\u8fdb\u3001\u540e\u9000\u3001\u5386\u53f2\u8bb0\u5f55\u7b49<\/p>\n\n\n\n
<body>\n\u3008button\u3009\u540e\u9000\u3008\/button\u3009\n\u3008button\u3009\u524d\u8fdb \u201cbutton\u3009\n<script>\nconst back = document.querySelector('button:first-child')\nconst forward = back.nextElementSibling\nback.addEventListener('click', function () {\n\/\/\u540e\u9000\u4e00\u6b65\n\/\/ history.back()\nhistory.go(-l)\n})\nforward.addEventListener('click', function () {\n\/\/\u524d\u8fdb\u4e00\u6b65\n\/\/ history. forward([)\nhistory.go(l)\n})\n<\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
\u672c\u5730\u5b58\u50a8<\/h1>\n\n\n\n
\u968f\u7740\u4e92\u8054\u7f51\u7684\u5feb\u901f\u53d1\u5c55\uff0c\u57fa\u4e8e\u7f51\u9875\u7684\u5e94\u7528\u8d8a\u6765\u8d8a\u666e\u904d\uff0c\u540c\u65f6\u4e5f\u53d8\u7684\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u4e3a\u4e86\u6ee1\u8db3\u5404\u79cd\u5404\u6837\u7684\u9700\u6c42\uff0c\u4f1a\u7ecf\u5e38\u6027\u5728\u672c\u5730\u5b58\u50a8\u5927\u91cf\u7684\u6570\u636e\uff0cHTML5\u89c4\u8303\u63d0\u51fa\u4e86\u76f8\u5173\u89e3\u51b3\u65b9\u6848\u3002
1\u3001\u6570\u636e\u5b58\u50a8\u5728 \u7528\u6237\u6d4f\u89c8\u5668 \u4e2d
2\u3001\u8bbe\u7f6e\u3001\u8bfb\u53d6\u65b9\u4fbf\u3001\u751a\u81f3\u9875\u9762\u5237\u65b0\u4e0d\u4e22\u5931\u6570\u636e
3\u3001\u5bb9\u91cf\u8f83\u5927\uff0csessionStorage\u548clocalStorage\u7ea6 5M \u5de6\u53f3
\u5e38\u89c1\u7684\u4f7f\u7528\u573a\u666f\uff1a https:\/\/todomvc.com\/examples\/vanilla-es6\/ \u9875\u9762\u5237\u65b0\u6570\u636e\u4e0d\u4e22\u5931<\/p>\n\n\n\n
\u672c\u5730\u5b58\u50a8\u5206\u7c7b- localStorage
\u4f5c\u7528: \u53ef\u4ee5\u5c06\u6570\u636e\u6c38\u4e45\u5b58\u50a8\u5728\u672c\u5730(\u7528\u6237\u7684\u7535\u8111), \u9664\u975e\u624b\u52a8\u5220\u9664\uff0c\u5426\u5219\u5173\u95ed\u9875\u9762\u4e5f\u4f1a\u5b58\u5728
\u7279\u6027\uff1a \u53ef\u4ee5\u591a\u7a97\u53e3\uff08\u9875\u9762\uff09\u5171\u4eab\uff08\u540c\u4e00\u6d4f\u89c8\u5668\u53ef\u4ee5\u5171\u4eab\uff09\u3001\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\u4f7f\u7528
\u8bed\u6cd5:
\u5b58\u50a8\u6570\u636e\uff1a localStorage.setItem(key, value)
\u83b7\u53d6\u6570\u636e\uff1a localStorage.getItem(key)
\u5220\u9664\u6570\u636e\uff1a localStorage.removeItem(key)<\/p>\n\n\n\n
\u672c\u5730\u5b58\u50a8\u590d\u6742\u6570\u636e<\/h3>\n\n\n\n
JSON.stringify(\u590d\u6742\u6570\u636e\u7c7b\u578b)                                  \u5c31\u662f\u53d8\u6210\u5b57\u7b26\u4e32<\/p>\n\n\n\n
const obj={\n    uname:'manba',\n    age:18,\n    gender:'\u5973'\n}\nlocalStorage.setItem('obj',JSON.stringify(obj))<\/code><\/pre>\n\n\n\n
<\/p>\n\n\n\n
\u628aJSON\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5bf9\u8c61\nconst str=localStorage.getItem('obj')\nconsole.log(JSON.parse(str))<\/code><\/pre>\n\n\n\n
<\/p>\n\n\n\n
\u628a\u53d6\u51fa\u6765\u7684\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5bf9\u8c61\nJSON.parse(JSON\u5b57\u7b26\u4e32)\n\n\nconst obj = JSON.parse(localstorage.getltem('goods'))\nconsole.log(obj)\n\uff1e\u5c06JSON\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u5bf9\u8c61 \u53d6\u51fa\u65f6\u5019\u4f7f\u7528<\/code><\/pre>\n\n\n\n
\u6570\u7ec4map\u548cjoin\u5b57\u7b26\u4e32\u62fc\u63a5<\/h3>\n\n\n\n
map \u53ef\u4ee5\u5904\u7406\u6570\u636e\uff0c\u5e76\u4e14 \u8fd4\u56de\u65b0\u7684\u6570\u7ec4<\/strong><\/p>\n\n\n\n
join() \u65b9\u6cd5\u7528\u4e8e\u628a\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8f6c\u6362\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n\n\n\n
<script>\nconst arr = ['red', 'blue', 'pink']\n\/\/1.\u6570\u7ec4map\u65b9\u6cd5\u5904\u7406\u6570\u636e\u5e76\u4e14\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\n \nconst newArr = arr.map(function (ele, index) {\n\/\/console.log(ele)\/\/\u7ec4\u5143\u7d20\n\/\/ console.log(index)\/\/\u7d22\u5f15\u53f7\nreturn ele + '\u989c\u8272'\nconsole.log(newArr)\n\/\/2.\u6570\u7ec4join\u65b9\u6cd5\u628a\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\n\/\/\u5c0f\u62ec\u53f7\u4e3a\u7a7a\u5219\u9017\u53f7\u5206\u5272\nconsole.log(newArr.join())\/\/ red\u989c\u8272\uff0cblue\u989c\u8272\uff0cpink\u989c\u8272\n\/\/\u5c0f\u62ec\u53f7\u662f\u7a7a\u5b57\u7b26\u4e32,\u5219\u5143\u7d20\u4e4b\u95f4\u6ca1\u6709\u5206\u9694\u7b26\nconsole.log(newArr.join(''))\/\/red\u989c\u8272blue\u989c\u8272pink\u989c\u8272\nconsole.log(newArr.join('|'))\/\/red\u989c\u8272|blue\u989c\u8272|pink\u989c\u8272\n<\/script><\/code><\/pre>\n\n\n\n
\u8bfb\u53d6\u5c31\u4e1a\u8868\u672c\u5730\u5b58\u50a8<\/h1>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n \n<head>\n    <meta charset=\"UTF-8\" \/>\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/>\n    <meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\" \/>\n    <title>\u5b66\u751f\u4fe1\u606f\u7ba1\u7406<\/title>\n    <link rel=\"stylesheet\" href=\"css\/index.css\" \/>\n<\/head>\n \n<body>\n    <h1>\u65b0\u589e\u5b66\u5458<\/h1>\n    <form class=\"info\" autocomplete=\"off\">\n        \u59d3\u540d\uff1a<input type=\"text\" class=\"uname\" name=\"uname\" \/>\n        \u5e74\u9f84\uff1a<input type=\"text\" class=\"age\" name=\"age\" \/>\n        \u6027\u522b:\n        <select name=\"gender\" class=\"gender\">\n            <option value=\"\u7537\">\u7537<\/option>\n            <option value=\"\u5973\">\u5973<\/option>\n        <\/select>\n        \u85aa\u8d44\uff1a<input type=\"text\" class=\"salary\" name=\"salary\" \/>\n        \u5c31\u4e1a\u57ce\u5e02\uff1a<select name=\"city\" class=\"city\">\n            <option value=\"\u5317\u4eac\">\u5317\u4eac<\/option>\n            <option value=\"\u4e0a\u6d77\">\u4e0a\u6d77<\/option>\n            <option value=\"\u5e7f\u5dde\">\u5e7f\u5dde<\/option>\n            <option value=\"\u6df1\u5733\">\u6df1\u5733<\/option>\n            <option value=\"\u66f9\u53bf\">\u66f9\u53bf<\/option>\n        <\/select>\n        <button class=\"add\">\u5f55\u5165<\/button>\n    <\/form>\n \n    <h1>\u5c31\u4e1a\u699c<\/h1>\n \n    <table>\n        <thead>\n            <tr>\n                <th>\u5b66\u53f7<\/th>\n                <th>\u59d3\u540d<\/th>\n                <th>\u5e74\u9f84<\/th>\n                <th>\u6027\u522b<\/th>\n                <th>\u85aa\u8d44<\/th>\n                <th>\u5c31\u4e1a\u57ce\u5e02<\/th>\n                <th>\u64cd\u4f5c<\/th>\n            <\/tr>\n        <\/thead>\n        <tbody>\n            <!-- \n        <tr>\n          <td>1001<\/td>\n          <td>\u6b27\u9633\u9738\u5929<\/td>\n          <td>19<\/td>\n          <td>\u7537<\/td>\n          <td>15000<\/td>\n          <td>\u4e0a\u6d77<\/td>\n          <td>\n            <a href=\"javascript:\">\u5220\u9664<\/a>\n          <\/td>\n        <\/tr> \n        -->\n        <\/tbody>\n    <\/table>\n    <script>\n        \/\/ \u53c2\u8003\u6570\u636e\n        const initData = [\n            {\n                stuId: 1001,\n                uname: '\u6b27\u9633\u9738\u5929',\n                age: 19,\n                gender: '\u7537',\n                salary: '20000',\n                city: '\u4e0a\u6d77',\n            }\n        ]\n        \/\/ localStorage.setItem('data', JSON.stringify(initData))\n        \/\/ 1.\u6e32\u67d3\u4e1a\u52a1\n        \/\/ 1.1 \u8bfb\u53d6\u672c\u5730\u5b58\u50a8\u7684\u6570\u636e   student-data  \u672c\u5730\u5b58\u50a8\u7684\u547d\u540d\n        \/\/ (1) \u672c\u5730\u5b58\u50a8\u6709\u6570\u636e\u5219\u8bb0\u5f97\u8f6c\u6362\u4e3a\u5bf9\u8c61\u7136\u540e\u5b58\u50a8\u5230\u53d8\u91cf\u91cc\u9762\uff0c\u540e\u671f\u7528\u4e8e\u6e32\u67d3\u9875\u9762\n        \/\/ (2) \u5982\u679c\u6ca1\u6709\u6570\u636e\uff0c\u5219\u7528\u7a7a\u6570\u7ec4\u6765\u66ff\u4ee3\n        const arr = JSON.parse(localStorage.getItem('data')) || []\n        \/\/ 1.2 \u5229\u7528map\u548cjoin\u65b9\u6cd5\u6765\u6e32\u67d3\u9875\u9762\n        const tbody = document.querySelector('tbody')\n        function render() {\n            \/\/ (1) \u5229\u7528map\u904d\u5386\u6570\u7ec4\uff0c\u8fd4\u56de\u5bf9\u5e94tr\u7684\u6570\u7ec4\n            const trArr = arr.map(function (ele, index) {\n                return `\n                <tr>\n                    <td>${ele.stuId}<\/td>\n                    <td>${ele.uname}<\/td>\n                    <td>${ele.age}<\/td>\n                    <td>${ele.gender}<\/td>\n                    <td>${ele.salary}<\/td>\n                    <td>${ele.city}<\/td>\n                    <td>\n                        <a href=\"javascript:\" data-id='${index}'>\u5220\u9664<\/a>\n                    <\/td>\n                <\/tr> \n                `\n            })\n            \/\/ (2) \u628a\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32 join\n            \/\/ (3) \u628a\u751f\u6210\u7684\u5b57\u7b26\u4e32\u8ffd\u52a0\u7ed9tbody\n            tbody.innerHTML = trArr.join('')\n        }\n        render()\n \n        \/\/ 2.\u65b0\u589e\u4e1a\u52a1\n        \/\/ 2.1 form\u8868\u5355\u6ce8\u518c\u63d0\u4ea4\u4e8b\u4ef6\uff0c\u963b\u6b62\u9ed8\u8ba4\u884c\u4e3a\n        const info = document.querySelector('.info')\n        const uname = document.querySelector('.uname')\n        const age = document.querySelector('.age')\n        const salary = document.querySelector('.salary')\n        const gender = document.querySelector('.gender')\n        const city = document.querySelector('.city')\n        info.addEventListener('submit', function (e) {\n            e.preventDefault()\n            \/\/ 2.2 \u975e\u7a7a\u5224\u65ad\n            if (!uname.value || !age.value || !salary.value) {\n                return alert('\u8f93\u5165\u5185\u5bb9\u4e0d\u80fd\u4e3a\u7a7a')\n            }\n            \/\/ 2.3 \u7ed9arr\u6570\u7ec4\u8ffd\u52a0\u5bf9\u8c61\uff0c\u91cc\u9762\u5b58\u50a8 \u8868\u5355\u83b7\u53d6\u8fc7\u6765\u7684\u6570\u636e\n            arr.push({\n                stuId: arr.length ? arr[arr.length - 1].stuId + 1 : 1,\n                uname: uname.value,\n                age: age.value,\n                gender: gender.value,\n                salary: salary.value,\n                city: city.value,\n            })\n            \/\/ 2.4 \u6e32\u67d3\u9875\u9762\u548c\u91cd\u7f6e\u8868\u5355reset()\u65b9\u6cd5\n            render()\n            this.reset()\n            \/\/ 2.5 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