{"id":2909,"date":"2020-04-22T16:41:47","date_gmt":"2020-04-22T08:41:47","guid":{"rendered":"http:\/\/www.yuguoxy.com\/geekhome\/?p=2909"},"modified":"2020-04-22T16:41:47","modified_gmt":"2020-04-22T08:41:47","slug":"javascript%e4%b9%8b%e9%97%ad%e5%8c%85%e4%b8%83%ef%bc%88%e9%97%ad%e5%8c%85%e7%9a%84%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2909","title":{"rendered":"javascript\u4e4b\u95ed\u5305\u4e03\uff08\u95ed\u5305\u7684\u5e94\u7528\u573a\u666f\uff09"},"content":{"rendered":"

1. \u95ed\u5305\u5e94\u7528\u573a\u666f\u4e4bsetTimeout<\/h4>\n

\u539f\u751f\u7684setTimeout\u4f20\u9012\u7684\u7b2c\u4e00\u4e2a\u51fd\u6570\u4e0d\u80fd\u5e26\u53c2\u6570,\u901a\u8fc7\u95ed\u5305\u53ef\u4ee5\u5b9e\u73b0\u4f20\u53c2\u6548\u679c<\/strong><\/p>\n

    setTimeout(function(param){\r\n        alert(param)\r\n    },1000)\r\n\r\n    \/\/\u901a\u8fc7\u95ed\u5305\u53ef\u4ee5\u5b9e\u73b0\u4f20\u53c2\u6548\u679c\r\n    function func(param){\r\n        return function(){\r\n            alert(param)\r\n        }\r\n    }\r\n    var f1 = func(1);\r\n    setTimeout(f1,1000);\r\n<\/code><\/pre>\n
2. \u95ed\u5305\u5e94\u7528\u573a\u666f\u4e4b\u56de\u8c03<\/h4>\n
\u6211\u4eec\u5b9a\u4e49\u884c\u4e3a\uff0c\u7136\u540e\u628a\u5b83\u5173\u8054\u5230\u67d0\u4e2a\u7528\u6237\u4e8b\u4ef6\u4e0a\uff08\u70b9\u51fb\u6216\u8005\u6309\u952e\uff09\u3002\u6211\u4eec\u7684\u4ee3\u7801\u901a\u5e38\u4f1a\u4f5c\u4e3a\u4e00\u4e2a\u56de\u8c03\uff08\u4e8b\u4ef6\u89e6\u53d1\u65f6\u8c03\u7528\u7684\u51fd\u6570\uff09\u7ed1\u5b9a\u5230\u4e8b\u4ef6\u4e0a<\/strong><\/p>\n
<body>\r\n    <p>\u54c8\u54c8\u54c8\u54c8\u54c8\u54c8<\/p>\r\n    <h1>hhhhhhhhh<\/h1>\r\n    <h2>qqqqqqqqq<\/h2>\r\n    <a href=\"#\" id=\"size-12\">12<\/a>\r\n    <a href=\"#\" id=\"size-14\">14<\/a>\r\n    <a href=\"#\" id=\"size-16\">16<\/a>\r\n\r\n<script>\r\n    function changeSize(size){\r\n        return function(){\r\n            document.body.style.fontSize = size + 'px';\r\n        };\r\n    }\r\n\r\n    var size12 = changeSize(12);\r\n    var size14 = changeSize(14);\r\n    var size16 = changeSize(16);\r\n\r\n    document.getElementById('size-12').onclick = size12;\r\n    document.getElementById('size-14').onclick = size14;\r\n    document.getElementById('size-16').onclick = size16;\r\n<\/script>\r\n<\/body>\r\n<\/code><\/pre>\n
3. \u95ed\u5305\u5e94\u7528\u573a\u666f\u4e4b\u5c01\u88c5\u53d8\u91cf<\/h4>\n
\u7528\u95ed\u5305\u5b9a\u4e49\u80fd\u8bbf\u95ee\u79c1\u6709\u51fd\u6570\u548c\u79c1\u6709\u53d8\u91cf\u7684\u516c\u6709\u51fd\u6570<\/strong><\/p>\n
    var counter = (function(){\r\n        var privateCounter = 0; \/\/\u79c1\u6709\u53d8\u91cf\r\n        function change(val){\r\n            privateCounter += val;\r\n        }\r\n        return {\r\n            increment:function(){   \/\/\u4e09\u4e2a\u95ed\u5305\u5171\u4eab\u4e00\u4e2a\u8bcd\u6cd5\u73af\u5883\r\n                change(1);\r\n            },\r\n            decrement:function(){\r\n                change(-1);\r\n            },\r\n            value:function(){\r\n                return privateCounter;\r\n            }\r\n        };\r\n    })();\r\n\r\n    console.log(counter.value());\/\/0\r\n    counter.increment();\r\n    counter.increment();\/\/2\r\n<\/code><\/pre>\n
    \n
  1. \u5171\u4eab\u7684\u73af\u5883\u521b\u5efa\u5728\u4e00\u4e2a\u533f\u540d\u51fd\u6570\u4f53\u5185\uff0c\u7acb\u5373\u6267\u884c\u3002<\/li>\n
  2. \u73af\u5883\u4e2d\u6709\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\u4e00\u4e2a\u5c40\u90e8\u51fd\u6570\uff0c\u901a\u8fc7\u533f\u540d\u51fd\u6570\u8fd4\u56de\u7684\u5bf9\u8c61\u7684\u4e09\u4e2a\u516c\u5171\u51fd\u6570\u8bbf\u95ee\u3002<\/li>\n<\/ol>\n
    \u5c01\u88c5\u4e00\u4e2a\u79c1\u6709\u53d8\u91cf\u53e6\u4e00\u4e2a\u4f8b\u5b50\uff1a\u7528JavaScript\u521b\u5efa\u4e00\u4e2a\u8ba1\u6570\u5668\uff1a<\/h5>\n
    'use strict';\r\nfunction create_counter(initial) {\r\n    var x = initial || 0;\r\n    return {\r\n        inc: function () {\r\n            x += 1;\r\n            return x;\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n
    \u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
    var c1 = create_counter();\r\nc1.inc(); \/\/ 1\r\nc1.inc(); \/\/ 2\r\nc1.inc(); \/\/ 3\r\n\r\nvar c2 = create_counter(10);\r\nc2.inc(); \/\/ 11\r\nc2.inc(); \/\/ 12\r\nc2.inc(); \/\/ 13\r\n<\/code><\/pre>\n
    \u5728\u8fd4\u56de\u7684\u5bf9\u8c61\u4e2d\uff0c\u5b9e\u73b0\u4e86\u4e00\u4e2a\u95ed\u5305\uff0c\u8be5\u95ed\u5305\u643a\u5e26\u4e86\u5c40\u90e8\u53d8\u91cfx\uff0c\u5e76\u4e14\uff0c\u4ece\u5916\u90e8\u4ee3\u7801\u6839\u672c\u65e0\u6cd5\u8bbf\u95ee\u5230\u53d8\u91cfx\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c \u95ed\u5305\u5c31\u662f\u643a\u5e26\u72b6\u6001\u7684\u51fd\u6570\uff0c\u5e76\u4e14\u5b83\u7684\u72b6\u6001\u53ef\u4ee5\u5b8c\u5168\u5bf9\u5916\u9690\u85cf\u8d77\u6765\u3002<\/strong><\/p>\n
    4. \u95ed\u5305\u5e94\u7528\u573a\u666f\u4e4b\u4e3a\u8282\u70b9\u5faa\u73af\u7ed1\u5b9aclick\u4e8b\u4ef6<\/h4>\n
    function count() {\r\n    var arr = [];\r\n    for (var i=1; i<=3; i++) {\r\n        arr.push(function () {\r\n            return i * i;\r\n        });\r\n    }\r\n    return arr;\r\n}\r\n\r\nvar results = count();\r\nvar f1 = results[0];\r\nvar f2 = results[1];\r\nvar f3 = results[2];\r\n<\/code><\/pre>\n
    \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6bcf\u6b21\u5faa\u73af\uff0c\u90fd\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u51fd\u6570\uff0c\u7136\u540e\uff0c\u628a\u521b\u5efa\u76843\u4e2a\u51fd\u6570\u90fd\u6dfb\u52a0\u5230\u4e00\u4e2aArray\u4e2d\u8fd4\u56de\u4e86\u3002<\/p>\n
    \u4f60\u53ef\u80fd\u8ba4\u4e3a\u8c03\u7528f1()\uff0cf2()\u548cf3()\u7ed3\u679c\u5e94\u8be5\u662f 1 4 9<\/code>\uff0c \u4f46\u5b9e\u9645\u7ed3\u679c\u662f\uff1a<\/p>\n
    f1(); \/\/ 16\r\nf2(); \/\/ 16\r\nf3(); \/\/ 16\r\n<\/code><\/pre>\n
    \u5168\u90e8\u90fd\u662f16\uff01\u539f\u56e0\u5c31\u5728\u4e8e\u8fd4\u56de\u7684\u51fd\u6570\u5f15\u7528\u4e86\u53d8\u91cfi\uff0c\u4f46\u5b83\u5e76\u975e\u7acb\u523b\u6267\u884c\u3002\u7b49\u52303\u4e2a\u51fd\u6570\u90fd\u8fd4\u56de\u65f6\uff0c\u5b83\u4eec\u6240\u5f15\u7528\u7684\u53d8\u91cfi\u5df2\u7ecf\u53d8\u6210\u4e864\uff0c\u56e0\u6b64\u6700\u7ec8\u7ed3\u679c\u4e3a16\u3002<\/p>\n
    \u8fd4\u56de\u95ed\u5305\u65f6\u7262\u8bb0\u7684\u4e00\u70b9\u5c31\u662f\uff1a\u8fd4\u56de\u51fd\u6570\u4e0d\u8981\u5f15\u7528\u4efb\u4f55\u5faa\u73af\u53d8\u91cf\uff0c\u6216\u8005\u540e\u7eed\u4f1a\u53d1\u751f\u53d8\u5316\u7684\u53d8\u91cf\u3002<\/strong><\/p>\n
    \u5982\u679c\u4e00\u5b9a\u8981\u5f15\u7528\u5faa\u73af\u53d8\u91cf\u600e\u4e48\u529e\uff1f\u65b9\u6cd5\u662f\u518d\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u8be5\u51fd\u6570\u7684\u53c2\u6570\u7ed1\u5b9a\u5faa\u73af\u53d8\u91cf\u5f53\u524d\u7684\u503c\uff0c\u65e0\u8bba\u8be5\u5faa\u73af\u53d8\u91cf\u540e\u7eed\u5982\u4f55\u66f4\u6539\uff0c\u5df2\u7ed1\u5b9a\u5230\u51fd\u6570\u53c2\u6570\u7684\u503c\u4e0d\u53d8\uff1a<\/p>\n
    function count() {\r\n    var arr = [];\r\n    for (var i=1; i<=3; i++) {\r\n        arr.push((function (n) {\r\n            return function () {\r\n                return n * n;\r\n            }\r\n        })(i));\r\n    }\r\n    return arr;\r\n}\r\n\r\nvar results = count();\r\nvar f1 = results[0];\r\nvar f2 = results[1];\r\nvar f3 = results[2];\r\n\r\nf1(); \/\/ 1\r\nf2(); \/\/ 4\r\nf3(); \/\/ 9\r\n<\/code><\/pre>\n
    \u6ce8\u610f\u8fd9\u91cc\u7528\u4e86\u4e00\u4e2a\u201c\u521b\u5efa\u4e00\u4e2a\u533f\u540d\u51fd\u6570\u5e76\u7acb\u523b\u6267\u884c\u201d\u7684\u8bed\u6cd5\uff1a<\/p>\n
    (function (x) {\r\n    return x * x;\r\n})(3); \/\/ 9\r\n<\/code><\/pre>\n
    5. ES6\u4e0d\u7ecf\u610f\u4e2d\u95ed\u5305\u7684\u5e94\u7528<\/h4>\n
    \u6709\u65f6\u5019\u95ed\u5305\u4f1a\u5728\u4f60\u4e0d\u7ecf\u610f\u7684\u65f6\u5019\u51fa\u73b0\uff0c\u4f60\u53ef\u80fd\u5df2\u7ecf\u770b\u5230\u4e86\u6211\u4eec\u79f0\u4e4b\u4e3a\u5c40\u90e8\u5e94\u7528\u7a0b\u5e8f\u7684\u793a\u4f8b\uff0c\u5982\u4e0b\u9762\u7684\u4ee3\u7801\u6240\u793a\u3002<\/p>\n
    let c = 4\r\nconst addX = x => n => n + x\r\nconst addThree = addX(3)\r\nlet d = addThree(c)\r\nconsole.log('example partial application', d)\r\n<\/code><\/pre>\n
    \u5982\u679c\u4e0d\u4f7f\u7528\u7bad\u5934\u51fd\u6570\uff0c\u7b49\u6548\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    let c = 4\r\nfunction addX(x) {\r\n  return function(n) {\r\n     return n + x\r\n  }\r\n}\r\nconst addThree = addX(3)\r\nlet d = addThree(c)\r\nconsole.log('example partial application', d)\r\n<\/code><\/pre>\n
    \u6211\u4eec\u58f0\u660e\u4e86\u4e00\u4e2a\u901a\u7528\u52a0\u6cd5\u51fd\u6570 addX\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff08x\uff09\u5e76\u8fd4\u56de\u53e6\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n
    \u8fd4\u56de\u7684\u51fd\u6570\u4e5f\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\u5e76\u5c06\u5176\u4e0e\u53d8\u91cf x \u76f8\u52a0\u3002<\/p>\n
    \u53d8\u91cf x \u662f\u95ed\u5305\u7684\u4e00\u90e8\u5206\uff0c\u5f53\u5728\u672c\u5730\u4e0a\u4e0b\u6587\u4e2d\u58f0\u660e\u53d8\u91cf addThree \u65f6\uff0c\u5b83\u4f1a\u5206\u914d\u5230\u4e00\u4e2a\u51fd\u6570\u5b9a\u4e49\u548c\u4e00\u4e2a\u95ed\u5305\uff0c\u95ed\u5305\u542b\u53d8\u91cf x\u3002<\/p>\n
    \u6240\u4ee5\uff0c\u5f53\u8c03\u7528\u5e76\u6267\u884c addThree \u65f6\uff0c\u5b83\u53ef\u4ee5\u4ece\u95ed\u5305\u4e2d\u8bbf\u95ee\u53d8\u91cf x \u548c\u53d8\u91cf n\uff08\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u8fdb\u53bb\uff09\uff0c\u5e76\u8fd4\u56de\u76f8\u52a0\u7684\u548c\u3002<\/p>\n
    \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u63a7\u5236\u53f0\u5c06\u6253\u5370\u6570\u5b57 7\u3002<\/p>\n
    \u53c2\u8003\u6587\u7ae0\u94fe\u63a5\uff1a<\/p>\n
      \n
    1. blog.csdn.net\/qq_21132509\u2026<\/a><\/li>\n
    2. www.liaoxuefeng.com\/wiki\/102291\u2026<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
      1. \u95ed\u5305\u5e94\u7528\u573a\u666f\u4e4bsetTimeout \u539f\u751f\u7684setTimeout\u4f20\u9012\u7684\u7b2c\u4e00\u4e2a\u51fd\u6570\u4e0d\u80fd\u5e26\u53c2\u6570,\u901a\u8fc7\u95ed\u5305\u53ef\u4ee5\u5b9e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[109,105,128],"tags":[139],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2909"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2909"}],"version-history":[{"count":1,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2909\/revisions"}],"predecessor-version":[{"id":2910,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2909\/revisions\/2910"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}