{"id":189,"date":"2019-10-31T17:26:41","date_gmt":"2019-10-31T09:26:41","guid":{"rendered":"http:\/\/blog.adeying.com\/?p=189"},"modified":"2019-10-31T17:26:41","modified_gmt":"2019-10-31T09:26:41","slug":"%e5%89%8d%e7%ab%af%e9%9d%a2%e8%af%95%e6%9c%9f%e5%be%85%e5%8a%a0%e5%85%a5%e4%b8%80%e4%b8%aa%e6%9b%b4%e5%a5%bd%e7%9a%84%e5%9b%a2%e9%98%9f","status":"publish","type":"post","link":"https:\/\/adeqing.com\/index.php\/2019\/10\/31\/default\/189\/","title":{"rendered":"\u524d\u7aef\u9762\u8bd5\u671f\u5f85\u52a0\u5165\u4e00\u4e2a\u66f4\u597d\u7684\u56e2\u961f"},"content":{"rendered":"
\n
1.\u8bf4\u4e00\u4e0b\u4f60\u719f\u6089\u7684\u8bbe\u8ba1\u6a21\u5f0f\r\n2.\u8bf4\u4e00\u4e0b\u4f60\u7406\u89e3\u7684\u6a21\u5757\u673a\u5236\r\n3.MVVM\u539f\u7406\r\n4.\u6700\u719f\u6089\u7684\u6846\u67b6\u8def\u7531\u673a\u5236\r\n5.\u72b6\u6001\u7ba1\u7406\r\n6.\u7edf\u8ba1\u5b57\u7b26\u4e32\u4e2d\u5355\u8bcd\u51fa\u73b0\u6b21\u6570\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
1.\u8bf4\u4e00\u4e0b\u4f60\u719f\u6089\u7684\u8bbe\u8ba1\u6a21\u5f0f<\/h3>\n
\u6211\u6700\u719f\u6089\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff1a\u5de5\u5382\u6a21\u5f0f\uff08ES5\uff09\uff0c\u7ec4\u4ef6\u8bbe\u8ba1\u6a21\u5f0f\uff08ES6\uff09 \u5de5\u5382\u6a21\u5f0f\uff08ES5\uff0c\u57fa\u4e8eprototype\u3002\u6b64\u4f8b\u4e2d\u57fa\u7c7bBase\uff0c\u5b50\u7c7bFactory)<\/p>\n
var Factory = function<\/span><\/span> () {\r\n    if<\/span>(!(this instanceof Factory)){\r\n        return<\/span> new Factory();\r\n    }\r\n}\r\nFactory.prototype = Object.assign(new Base(), {\r\n    version: '0.0.1'<\/span>,\r\n    defaultOption:{\r\n        title:'\u6807\u9898'<\/span>\r\n    },\r\n    init:function<\/span> (cfg) {\r\n        this.title = cfg.title || ''<\/span>;\r\n        this.currentOption = Object.assign(this.defaultOption,{\r\n           \/\/...\r\n        })\r\n    },\r\n    render: function<\/span><\/span> () {\r\n        var option = this.currentOption;\r\n        this.chart.setOption(option);\r\n    },\r\n    showTitle: function<\/span><\/span> () {\r\n        this._showTitle();\r\n    }\r\n})\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u7ec4\u4ef6\u8bbe\u8ba1\u6a21\u5f0f\uff08ES6\uff0c\u57fa\u4e8eclass\uff0c\u65b9\u4fbf\u7ee7\u627f\u548c\u521d\u59cb\u5316\uff0c\u4e5f\u662fReact\u7ec4\u4ef6\u7684\u63a8\u8350\u5199\u6cd5\uff0c\u6211\u6bd4\u8f83\u559c\u6b22\u3002\u6b64\u4f8b\u4e2d\u7236\u7c7bCompnent\uff0c\u5b50\u7c7bRetrive\uff09<\/p>\n
class Retrive extends Component {\r\n    constructor (props) {\r\n        super(props);\r\n        this.state = {\r\n            name:''<\/span>\r\n        };\r\n        this.getRemoteData = this.getRemoteData.bind(this);\r\n    }\r\n    getRemoteData (data) {\r\n        this.state.retriveResult = data;\r\n    }\r\n    render<\/span><\/span>(){\r\n        return<\/span> (\r\n            <div className=\"Retrive\"<\/span>>\r\n                <Button name=\"search\"<\/span> onClick={this.getRemoteData}>\u67e5\u8be2<\/Button>\r\n            <\/div>\r\n        );\r\n    }\r\n}\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
2.\u8bf4\u4e00\u4e0b\u4f60\u7406\u89e3\u7684\u6a21\u5757\u673a\u5236<\/h3>\n
AMD: \u5f02\u6b65\u6a21\u5757\u52a0\u8f7d\u89c4\u8303\u3002 a.js\uff0c\u5b9a\u4e49\u4e00\u4e2a\u4f9d\u8d56jQuery\u548cechrts\u7684\u7ec4\u4ef6\u3002<\/p>\n
define(['jquery'<\/span>, 'echarts'<\/span>], function<\/span> ($, echarts) {\r\n  var AMD = function<\/span><\/span>(){}\r\n  AMD.prototype = {\r\n       title:''<\/span>,\r\n        foo: function<\/span><\/span>(){}\/\/AMD\u7c7b\u6216\u8005\u7ee7\u627fAMD\u7c7b\u7684\u5b50\u7c7b\u7684\u5c5e\u6027\r\n  }\r\n  function<\/span> bar<\/span><\/span>(){}\/\/\u8fd4\u56de\uff0c\u516c\u5171\u5c5e\u6027\r\n   function<\/span> baz<\/span><\/span>(){} \/\/\u672a\u8fd4\u56de\uff0c\u79c1\u6709\u5c5e\u6027\r\n  return<\/span> {\r\n       main:AMD,\r\n       bar: bar\r\n  }\r\n});\r\n\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u5982\u679cb.js\u4f9d\u8d56a.js\uff0c\u53ef\u4ee5\u8fd9\u6837<\/p>\n
define(['.\/a'<\/span>], function<\/span> (a) {\r\n     \/\/\u8c03\u7528\u6784\u9020\u51fd\u6570,foo\r\n     var instance_amd = new a.main();\r\n     instance_amd.foo()\r\n      \/\/\u8c03\u7528bar\r\n     a.bar()\r\n});\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
ES6 modules: \u548cpython\u7684\u5305\u673a\u5236\u5f88\u7c7b\u4f3c\uff0c\u5bfc\u5165import\uff0c\u5bfc\u51faexport\u3002<\/p>\n
1.\u573a\u666f\uff1avue\uff0creact\u63a8\u8350\u673a\u5236\uff0c\u9700\u8981babel\u8f6c\u4e49\u6210es5\u4ee5\u517c\u5bb9\u6d4f\u89c8\u5668\u3002\r\n2.\u5173\u4e8eimport...(from...)\r\n\u2460.import...from...\u7684from\u547d\u4ee4\u540e\u9762\u53ef\u4ee5\u8ddf\u5f88\u591a\u8def\u5f84\u683c\u5f0f\uff0c\u82e5\u53ea\u7ed9\u51favue\uff0caxios\u8fd9\u6837\u7684\u5305\u540d\uff0c\u5219\u4f1a\u81ea\u52a8\u5230node_modules\u4e2d\u52a0\u8f7d\uff1b\u82e5\u7ed9\u51fa\u76f8\u5bf9\u8def\u5f84\u53ca\u6587\u4ef6\u524d\u7f00\uff0c\u5219\u5230\u6307\u5b9a\u4f4d\u7f6e\u5bfb\u627e\u3002\r\n\u2461.\u53ef\u4ee5\u52a0\u8f7d\u5404\u79cd\u5404\u6837\u7684\u6587\u4ef6\uff1a.js\u3001.vue\u3001.less\u7b49\u7b49\u3002\r\n\u2462.\u53ef\u4ee5\u7701\u7565\u6389from\u76f4\u63a5\u5f15\u5165\u3002\r\n3.\u5173\u4e8eexport\r\n\u2460.\u5bfc\u51fa\u7684\u53ef\u4ee5\u662f\u5bf9\u8c61\uff0c\u8868\u8fbe\u5f0f\uff0c\u51fd\u6570\uff0c\u7c7b\r\n\u2461.\u5bfc\u51fa\u662f\u4e3a\u4e86\u8ba9\u522b\u4eba\u5bfc\u5165\r\n4.\u8a00\u5916\u8bdd:\u4f7f\u7528es6\u7684\u8bdd\uff0c\u6709\u4e00\u4e2a\u7279\u522b\u597d\u7684\u89c4\u8303\u53bb\u9075\u5b88\uff0cairbnb\u7684es6\u89c4\u8303\uff08https:\/\/github.com\/airbnb\/javascript\uff09\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
CommonJS\uff1anodejs\u4e2d\u4f7f\u7528\u8f83\u591a\uff0c\u5173\u952e\u8bcd\u662frequire\uff0c\u6ca1\u5199\u8fc7node\u5305\uff0c\u53ea\u5f15\u7528\u8fc7\u522b\u4eba\u7684\u6a21\u5757\uff0c\u6240\u4ee5\u5185\u90e8\u5b9e\u73b0\u539f\u7406\u4e0d\u662f\u5f88\u6e05\u695a\u3002<\/p>\n
3.MVVM\u539f\u7406<\/h3>\n
MVVM\u662f\u4e00\u79cd\u8f6f\u4ef6\u67b6\u6784\u6a21\u5f0f\uff0cMVVM\u6709\u52a9\u4e8e\u524d\u540e\u7aef\u5206\u79bb\u3002 View:\u89c6\u56fe\u5c42\uff0c\u7c97\u7565\u7406\u89e3\u4e3aDOM\u3002 Model:\u4e0e\u6570\u636e\u5e93\u5bf9\u5e94\u7684model\uff0c\u4e00\u822c\u4e3ajson\u683c\u5f0f\uff0c\u4f5c\u4e3areq\u7684body\u901a\u8fc7http(s)\u4e0e\u6570\u636e\u5e93\u5b9e\u73b0\u901a\u4fe1\u3002 ViewModel:View\u4e0eModel\u901a\u8fc7ViewModel\u5b9e\u73b0\u53cc\u5411\u7ed1\u5b9a\u3002<\/p>\n
\u6838\u5fc3\u662f\u63d0\u4f9b\u5bf9View\u548cViewModel\u7684\u53cc\u5411\u6570\u636e\u7ed1\u5b9a\uff0c\u8fd9\u6837\u4f7f\u5f97ViewModel\u7684\u6539\u53d8View\u7acb\u5373\u53d8\u5316\uff0cMVVM\u5728\u524d\u7aef\u7684\u5b9e\u73b0\u6709\uff1aangular\uff0cvue\uff0creact\u3002<\/p>\n
vue\u4e2d\u7684\u5e38\u7528\u6570\u636e\u53cc\u5411\u7ed1\u5b9a\u3002<\/p>\n
view:{{message}}\r\nviewModel v-model=\"message\"<\/span>\r\nmodel:message\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
<div id=\"app-6\"<\/span>>\r\n  <p>{{ message }}<\/p>\r\n  <input v-model=\"message\"<\/span>>\r\n<\/div>\r\n\r\nvar app6 = new Vue({\r\n  el: '#app-6'<\/span>,\r\n  data: {\r\n         message: 'Hello Vue!'<\/span>\r\n  }\r\n})\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u5355\u6587\u4ef6\u7ec4\u4ef6\u4e2d\u7684\u8bdd\uff0c\u5c31\u591a\u4e86\u4e00\u4e2a\u7528html5\u7684template\u6807\u7b7e\u5c06view\u548cviewModel\u5305\u88f9\u8d77\u6765\uff0cmodel\u90e8\u5206\u505c\u7559\u5728script\u6807\u7b7e\u90e8\u5206\u3002<\/p>\n
<template>\r\n     view\r\n     viewModel\r\n<\/tamplate>\r\n<script>\r\n     model\r\n<\/script>\r\n<styles>\r\n     \u4e3a\u4e86\u8ba9view\u597d\u770b\u70b9\r\n<\/styles>\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
react\u7684\u8bdd\uff0c\u6211\u5728\u4f7f\u7528\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6ca1\u6709\u542c\u8bf4\u8fc7\u53cc\u5411\u7ed1\u5b9a\u7684\u4e1c\u897f\uff0c\u5bf9redux reducers\u63a8\u8350\u5199\u4e3a\u7eaf\u51fd\u6570\u5370\u8c61\u6df1\u523b\uff0c\u7eaf\u51fd\u6570\u7684\u8bdd\uff0c\u611f\u89c9\u5e94\u8be5\u6709\u70b9\u5355\u9879\u6570\u636e\u6d41\u7684\u610f\u601d\u3002<\/p>\n
\u65e2\u7136\u8bf4\u5230\u6846\u67b6\u4e86\uff0c\u8bf4\u4e00\u4e2a\u6700\u8ba9\u6211\u611f\u89c9\u6709\u8da3\u7684\u70b9\uff0c\u90a3\u5c31\u662f\u7ec4\u4ef6\u95f4\u7684\u901a\u4fe1\uff0c\u5bf9\u4e8e\u7b80\u5355\u7ec4\u4ef6\uff0c\u53ea\u6d89\u53ca\u7236\u5b50\u7ea7\u522b\u7684\u901a\u4fe1\u7684\uff0cvue\u4f7f\u7528on emit\u7684\u65b9\u5f0f\uff0creact\u4f7f\u7528props\u3002\u5bf9\u4e8e\u590d\u6742\u7ea7\u522b\u901a\u4fe1\uff0c\u7237\u7237\u7236\u4eb2\u513f\u5b50\u5b59\u5b50\u7b49\u7b49\u65f6\uff0cvue\u63a8\u8350\u4f7f\u7528vuex\uff0creact\u63a8\u8350\u4f7f\u7528redux\uff0c\u7edf\u4e00\u7684\u5168\u5c40\u72b6\u6001\u6811\u7528\u6765\u505a\u72b6\u6001\u7ba1\u7406\u975e\u5e38\u597d\uff0c\u53ef\u4ee5\u4f7f\u5f97\u903b\u8f91\u975e\u5e38\u6e05\u6670\u3002vue\u9879\u76ee\u6587\u4ef6\u7ed3\u6784\u7814\u7a76\u4e0d\u6df1\uff0creact\u7684\u9879\u76ee\u6587\u4ef6\u7ed3\u6784\u7684\u8bdd\uff0cpresentational\u548ccontainers\u7684\u8bbe\u8ba1\u65b9\u6cd5\u611f\u89c9\u975e\u5e38\u6709\u9053\u7406\uff0c\u4e00\u4e2a\u8d1f\u8d23\u89c6\u56fe\u4e00\u4e2a\u8d1f\u8d23\u6570\u636e\uff0c\u975e\u5e38\u6e05\u723d\u3002<\/p>\n
4.\u6700\u719f\u6089\u7684\u6846\u67b6\u8def\u7531\u673a\u5236<\/h3>\n
vue\u8def\u7531\u4f9d\u8d56\uff1avue-router \u901a\u8fc7\u7ec4\u5408\u7ec4\u4ef6\u6765\u7ec4\u6210\u5355\u9875\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ea\u9700\u8981\u5c06\u7ec4\u4ef6\u6620\u5c04\u5230\u8def\u7531\u5373\u53ef\u3002 \u524d\u7aef\u8def\u7531\u7684\u6838\u5fc3\uff0c\u5c31\u5728\u4e8e \u2014\u2014 \u6539\u53d8\u89c6\u56fe\u7684\u540c\u65f6\u4e0d\u4f1a\u5411\u540e\u7aef\u53d1\u51fa\u8bf7\u6c42\u3002 \u9700\u8981\u6ce8\u610f2\u79cd\u6a21\u5f0f\u7684\u533a\u522b\uff1ahash\u6a21\u5f0f\u548chistory\u6a21\u5f0f\uff0chash\u6a21\u5f0f\u4f1a\u5728\u540e\u9762\u52a0\u4e00\u4e2a\u5f88\u4e11\u7684#\uff0c\u53ef\u4ee5\u5f00\u542fhistory\u53bb\u6389\u3002 hash\u6a21\u5f0f\u539f\u7406\uff1a\u5b83\u7684\u7279\u70b9\u5728\u4e8e\uff1ahash \u867d\u7136\u51fa\u73b0\u5728 URL \u4e2d\uff0c\u4f46\u4e0d\u4f1a\u88ab\u5305\u62ec\u5728 HTTP \u8bf7\u6c42\u4e2d\uff0c\u5bf9\u540e\u7aef\u5b8c\u5168\u6ca1\u6709\u5f71\u54cd\uff0c\u56e0\u6b64\u6539\u53d8 hash \u4e0d\u4f1a\u91cd\u65b0\u52a0\u8f7d\u9875\u9762\u3002hash\u53ef\u4ee5\u7406\u89e3\u4e3a\u951a\u70b9\uff0c\u4f8b\u5982.\/index.html\/#\/foo\uff0chash\u503c\u4e3a#\/foo\uff0c\u8fd9\u6837\u4e0d\u4f1a\u8df3\u8f6c\u9875\u9762\u3002\u5c31\u76f8\u5f53\u4e8e\u7edf\u4e00\u9875\u9762\u7684\u4e0d\u540c\u951a\u70b9\uff0c\u9875\u9762\u95f4\u8df3\u8f6c\u4e0e .\/index.html\/#foo\u5230.\/index.html\/#bar\u7c7b\u4f3c\u3002<\/p>\n
.\/store\/index.js<\/p>\n
import Router from 'vue-router'<\/span>\r\nVue.use(Router)\r\nexport<\/span> default new Router({\r\n  routes: [\r\n  {\r\n  path: '\/common'<\/span>,\r\n  name: 'common'<\/span>,\r\n  component: Common\r\n  }\r\n]\r\n\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u8def\u7531\u5c42\u9762\u8fd8\u4f1a\u5305\u62ec\u5d4c\u5957\u8def\u7531\uff0c\u52a8\u6001\u8def\u7531\u4ee5\u53ca\u91cd\u5b9a\u5411\uff0c\u76f8\u5f53\u4e8e\u81ea\u5df1\u6a21\u4eff\u6d4f\u89c8\u5668\u8bf7\u6c42\u7136\u540e\u670d\u52a1\u5668\u54cd\u5e94\u6a21\u5f0f\uff0c\u5176\u5b9e\u4e0d\u6d89\u53ca\u5411\u540e\u7aef\u8bf7\u6c42\uff0c\u4ec5\u5728\u6d4f\u89c8\u5668\u5c31\u53ef\u4ee5\u5b9e\u73b0\u9875\u9762\u8df3\u8f6c\uff0c\u524d\u6bb5\u65f6\u95f4\u6211\u505a\u7684\u7528\u6237\u6743\u9650\u63a7\u5236\u5c31\u7528\u5230\u4e86vue-router\uff0c\u76f8\u6bd4MVC\u7ed3\u6784\u4e0b\u7684\u540e\u7aef\u8def\u7531\uff0c\u6e05\u6670\u4e86\u4e0d\u5c11\uff0c\u8fd9\u6837\u540e\u7aef\u53ea\u8981\u8d1f\u8d23\u8def\u7531\u7f16\u5199api\u5c31\u597d\u3002<\/p>\n
5.\u72b6\u6001\u7ba1\u7406<\/h3>\n
\u4e0b\u9762\u662f\u6211\u5728\u7528vuex\u505a\u9879\u76ee\u65f6\u7684\u4e00\u4e9b\u601d\u8003\uff0c\u7b80\u5355\u4fee\u6539\u4e86\u4e00\u4e0b\uff0c\u4e5f\u6dfb\u52a0\u4e86\u4e00\u4e9b\u5173\u4e8eredux\u7684\u601d\u8003\u3002<\/p>\n
vuex state\uff0c\u524d\u7aefdata view\uff0c\u524d\u7aefDOM actions\uff0c\u7528\u6237\u64cd\u4f5c\uff0c\u5f15\u8d77data\u53d8\u5316\u4ece\u800c\u5bfc\u81f4DOM\u53d8\u5316\u3002<\/p>\n
\u591a\u4e2a\u7ec4\u4ef6\uff08\u89c6\u56fe\uff09\u5171\u4eab\u72b6\u6001\uff1a\u901a\u4fd7\u6765\u8bb2\uff0c\u5c31\u662f\u591a\u4e2a\u7ec4\u4ef6\u95f4\u4f1a\u901a\u4fe1\u65f6\uff0c\u5bfc\u81f4\u4ece\u540e\u7aef\u62ff\u6765\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316\uff0c\u5f53\u7ec4\u4ef6\u8f83\u591a\u65f6\uff0c\u5982\u679c\u5144\u5f1f\u7ec4\u4ef6\u95f4\u7684\u901a\u4fe1\u90fd\u4f9d\u8d56\u7236\u7ec4\u4ef6\u8fdb\u884c\u901a\u4fe1\uff0c\u4f1a\u5bfc\u81f4\u7ec4\u4ef6\u95f4\u7684\u8026\u5408\u975e\u5e38\u9ad8\uff0c\u4ece\u800c\u5bfc\u81f4\u9879\u76ee\u903b\u8f91\u6df7\u4e71\uff0c\u96be\u4ee5\u7ef4\u62a4\u3002<\/p>\n
\u591a\u4e2a\u7ec4\u4ef6\uff08\u89c6\u56fe\uff09\u4f9d\u8d56\u4e8e\u540c\u4e00\u72b6\u6001\u3002 \u6765\u81ea\u4e0d\u540c\u89c6\u56fe\u7684\u884c\u4e3a\u9700\u8981\u53d8\u66f4\u540c\u4e00\u72b6\u6001\u3002<\/p>\n
\u5168\u5c40\u5355\u4f8b\u6a21\u5f0f\u7ba1\u7406\uff0c\u628a\u7ec4\u4ef6\u7684\u5171\u4eab\u72b6\u6001\u62bd\u53d6\u51fa\u6765 \u4e0d\u7ba1\u5728\u7ec4\u4ef6\u6811\u7684\u54ea\u4e2a\u4f4d\u7f6e\uff0c\u4efb\u4f55\u7ec4\u4ef6\u90fd\u80fd\u83b7\u53d6\u72b6\u6001\u6216\u8005\u89e6\u53d1\u884c\u4e3a\uff01<\/p>\n
\u5b9e\u8df5\u51fa\u771f\u77e5\uff1a<\/p>\n
1.state\u5b58\u653e\u5728index.js\u4e2d\uff0c\u521b\u5efa\u7684Store\u5b9e\u4f8bgetter,mutations,actions\u7b49\uff0c\u53ef\u4ee5\u5206\u79bb\u51fa\u6765\r\n2.getters\u5b58\u653e\u5728getter.js\u4e2d\uff0c\u6570\u636e\u6d41\u4e3astate\u2192getter\u2192\u7ec4\u4ef6\uff0cgetter\u76f8\u5f53\u4e8e\u4e00\u4e2a\u6570\u636e\u83b7\u53d6\u8fc7\u6ee4\u5668\uff0c\u4ece\u4ed3\u5e93\u62ff\u7279\u5b9a\u6570\u636e\u5230\u7ec4\u4ef6\uff0c\u76f8\u5f53\u4e8e\u5bf9computed\u7684\u96c6\u4e2d\u5904\u7406\u3002\r\n3.mutations\u5b58\u653e\u5728mutations.js\u4e2d\uff0c\u6570\u636e\u6d41\u4e3a\u7ec4\u4ef6\u2192mutations\u2192state\uff0cmutations\u76f8\u5f53\u4e8e\u4e00\u4e2a\u6570\u636e\u63d0\u4ea4\u53d1\u5c04\u5668\uff0c\u4ece\u7ec4\u4ef6\u63d0\u4ea4\u6570\u636e\u5230\u4ed3\u5e93\r\n4.actions\u5b58\u653e\u5728actions.js\u4e2d\uff0c\u6570\u636e\u6d41\u4e3a\u7ec4\u4ef6\u2192actions\u2192mutations\u2192state\uff0c\u5f02\u6b65\u64cd\u4f5c\u7684\u4e3b\u8981\u573a\u6240\u3002\r\n5.modules\u662f\u5f00\u53d1\u5927\u578b\u5e94\u7528\u65f6\u9700\u8981\u7528\u5230\u7684\uff0c\u6bcf\u4e2amodule\u90fd\u6709\u5355\u72ec\u7684states\uff0cgetters\uff0cactions\u4ee5\u53camutation\uff0c\u6709\u4e00\u80a1nodejs\u6a21\u5757\u7684\u5473\u9053\u3002\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
vuex\u4e09\u539f\u5219\uff1a<\/p>\n
1.\u552f\u4e00\u6570\u636e\u6e90\r\n2.\u4fdd\u6301\u72b6\u6001\u53ea\u8bfb\r\n3.\u6570\u636e\u6539\u53d8\u53ea\u80fd\u901a\u8fc7\u7eaf\u51fd\u6570\u5b8c\u6210 \u66f4\u6539 Vuex \u7684 store \u4e2d\u7684\u72b6\u6001\u7684\u552f\u4e00\u65b9\u6cd5\u662f\u63d0\u4ea4 mutation\u3002\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u4e00\u5b9a\u8981\u6ce8\u610fmutation\u548caction\u7684\u533a\u522b\uff01<\/p>\n
mutation\u53ea\u53d8\u66f4\u672c\u5730\u7684\u72b6\u6001\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u76f4\u63a5\u53ea\u53bb\u4fee\u6539store\u4e2d\u7684\u6570\u636e\u3002 action\u5305\u542b\u5f02\u6b65\u64cd\u4f5c\uff0c\u76f4\u63a5\u8c03\u7528api\uff0c\u901a\u8fc7api\u7684\u6570\u636e\uff0c\u518d\u63d0\u4ea4mutation\u3002<\/p>\n
\u53ef\u4ee5\u8bf4\uff0caction\u53ea\u6bd4mutation\u591a\u4e86\u4e00\u4e2a\u5f02\u6b65\u8c03\u7528api\u7684\u64cd\u4f5c\uff0c\u56e0\u4e3a\u8c03\u7528api\u540e\uff0c\u4e00\u822c\u67092\u79cd\u8fd4\u56de\u7ed3\u679c\uff0csucces\u6216\u8005error\uff0c\u6216\u8005\u662fpromise\u7684\u591a\u79cd\u72b6\u6001\uff0c\u6839\u636e\u4e0d\u540c\u7684\u3002<\/p>\n
\u6700\u8fd1\u5728\u5b66\u4e60redux\uff0c\u7ec4\u4ef6dispatch\u4e00\u4e2aaction\u5230store\uff0c\u76f8\u5f53\u4e8e\u53d1\u9001\u4e00\u4e2ahttp\u8bf7\u6c42\uff0c\u7136\u540estore\u505a\u51fa\u54cd\u5e94\uff0c\u8fd4\u56de\u4e00\u4e2aresponse\u7ed9\u7ec4\u4ef6\u3002\u548cvuex\u5927\u81f4\u7c7b\u4f3c\uff0c\u552f\u4e00\u6709\u533a\u522b\u7684\u662f\uff0cvuex\u8fd8\u9700\u8981\u5f15\u5165react-redux\uff0c\u5f15\u5165Provider\u548cconnect\u8fde\u63a5\u7ec4\u4ef6\u548cstore\u3002<\/p>\n
6.\u7edf\u8ba1\u5b57\u7b26\u4e32\u4e2d\u5355\u8bcd\u51fa\u73b0\u6b21\u6570<\/h3>\n
” hi how are you i am fine thank you youtube am am “\uff0c\u7edf\u8ba1”you”\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/p>\n
function<\/span> wordCount(str,word){\r\n  var str = str || \"\"<\/span>;\r\n  var word = word || \"\"<\/span>;\r\n  var strArr = str.split(\" \"<\/span>);\r\n  var count = 0;\r\n  for<\/span>(var i=0;i<strArr.length;i++){\r\n      if<\/span>(word===strArr[i]){\r\n          count++\r\n      }\r\n  }\r\n  return<\/span> count;\r\n}\r\nwordCount(\"hi how are you i am fine thank you youtube am am\"<\/span>,\"you\"<\/span>);\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u5982\u679c\u5b57\u7b26\u4e32\u6ca1\u6709\u7a7a\u683c\u600e\u4e48\u529e\uff1f<\/p>\n
function<\/span> wordCount(str,word){\r\n  var str = str || \"\"<\/span>;\r\n  var word = word || \"\"<\/span>;\r\n  var count = 0;\r\n  var index = str.indexOf(word);\r\n  while<\/span>(index!==-1){\r\n      count++;\r\n      str = str.substr(index+word.length);\r\n      index = str.indexOf(word)\r\n  }\r\n  return<\/span> count;\r\n}\r\nwordCount(\"hihowareyouiamfinethankyouyoutubeamam\"<\/span>,\"you\"<\/span>);\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u5982\u679c\u4e0d\u7528js\u5185\u7f6e\u5b57\u7b26\u4e32\u51fd\u6570\uff0c\u81ea\u5df1\u7528\u6bcf\u4e2a\u5b57\u7b26\u5bf9\u6bd4\u5462\uff1f<\/p>\n
function<\/span> wordCount(str,word){\r\n  var num = 0;\r\n  var str = str+\"  \"<\/span> || \"\"<\/span>;\r\n  var word = word || \"\"<\/span>;\r\n  var strArr = str.split(\"\"<\/span>);\r\n  var wordArr = word.split(\"\"<\/span>);\r\n  var count = 0;\r\n  function<\/span> compare(arr1,a,arr2,b){\r\n        if<\/span>(b+a<arr2.length){\r\n          if<\/span>(arr1[a]===arr2[b+a]){\r\n            num++;\r\n            return<\/span> compare(arr1,a+1,arr2,b+1)\r\n          }\r\n          if<\/span>(num===arr1.length){\r\n            count++\r\n            num = 0;\r\n          }\r\n        }\r\n  }\r\n  for<\/span>(var i=0;i<strArr.length;i++){\r\n      for<\/span>(var j=0;j<wordArr.length;j++){\r\n        if<\/span>(wordArr[wordArr.length-1]===strArr[i+wordArr.length-1]){\r\n          compare(wordArr,0,strArr,i+0)\r\n        }\r\n      }\r\n  }\r\n  return<\/span> count;\r\n}\r\nwordCount(\"hihowareyouiamfinethankyouyoutubeamam\"<\/span>,\"am\"<\/span>);\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u4e00\u4e9b\u5417\uff1f<\/p>\n
function<\/span> wordCount (str,word) {\r\n\r\n  var str = str+\"  \"<\/span> || \"\"<\/span>;\r\n  var word = word || \"\"<\/span>;\r\n  var strArr = str.split(\"\"<\/span>);\r\n  var wordArr = word.split(\"\"<\/span>);\r\n  var wordArrLen = wordArr.length;\r\n  var count = 0;\r\n  var num = 0;\r\n\r\n  function<\/span> compare (arr1,a,arr2,b) {\r\n        if<\/span>(b+a<arr2.length){\r\n          if<\/span>(arr1[a]===arr2[b+a]){\r\n            num++;\r\n            return<\/span> compare(arr1,a+1,arr2,b+1)\r\n          }\r\n          if<\/span>(num===arr1.length){\r\n            count++;\r\n            num = 0;\r\n          }\r\n        }\r\n  }\r\n\r\n  var j = 0;\r\n  while<\/span>(j<wordArrLen){\r\n      var i = 0;\r\n      while<\/span>(i<strArr.length){\r\n          if<\/span>(wordArr[wordArrLen -1]===strArr[i+wordArrLen -1]){\r\n            compare(wordArr,0,strArr,i+0);\r\n          }\r\n          i++;\r\n      }\r\n      j++;\r\n  }\r\n  return<\/span> count;\r\n}\r\n\r\nwordCount(\"hihowareyouiamfinethankyouyoutubeamam\"<\/span>,\"a\"<\/span>);\r\n\r\n\/\/1.\u8c03\u6574\u6700\u9ad8\u5c42\u7ea7\u904d\u5386\u6570\u7ec4\uff0c\u4ece37\u76842\u6b21\u65b9\u964d\u52303\u76842\u6b21\u65b9\uff0c\u4ece1369\u964d\u52309\r\n\/\/2.\u5408\u5e76\u63a7\u5236\u53d8\u91cf\u548c\u63a7\u5236\u6761\u4ef6\uff0c\u4f7f\u7528while<\/span>\u66ff\u4ee3for<\/span>\uff0c\u53bb\u9664JS\u5f15\u64ce\u67e5\u8be2i,j\u662f\u5426\u5b58\u5728\u7684\u6d88\u8017\uff0c\u4f1a\u7a0d\u5fae\u964d\u4f4e\u4ee3\u7801\u53ef\u8bfb\u6027\r\n\/\/3.\u5bf9\u91cd\u590d\u5f15\u7528\u7684wordArr.length,\u8d4b\u503c\u7ed9\u5c40\u90e8\u53d8\u91cfwordArrLen,\u5728\u8fd9\u91cc\uff0cArray.prototype.length\u7684\u67e5\u8be2\u6b21\u6570\u4ece3\u6b21\u964d\u4f4e\u52301\u6b21\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u9762\u8bd52 -\u83ab\u6101\u524d\u8def\u65e0\u77e5\u5df1\uff0c\u5929\u4e0b\u8c01\u4eba\u4e0d\u8bc6\u541b<\/h2>\n
1.\u5e73\u65f6\u6709\u9047\u5230\u8fc7\u8de8\u57df\u95ee\u9898\u5417\uff1f\r\n2.\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\u6700\u7ec8\u8f93\u51fa\u4ec0\u4e48\uff1f\r\n3.[\"1\",\"2\",\"3\"].map(parseInt)\u8fd4\u56de\u7684\u662f\u4ec0\u4e48\uff1f\r\n4.\u4e0b\u9762\u4ee3\u7801\u4e2d\u201c\u5165\u5e93\u201d\u7684\u989c\u8272\u662f\uff1f\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
1.\u5e73\u65f6\u6709\u9047\u5230\u8fc7\u8de8\u57df\u95ee\u9898\u5417\uff1f<\/h3>\n
\u8bf4\u5230\u8de8\u57df\u95ee\u9898\uff0c\u5c31\u4e00\u5b9a\u8981\u8bf4\u5230\u540c\u6e90\uff0c\u4ec0\u4e48\u662f\u540c\u6e90\uff0c\u76f8\u540c\u534f\u8bae\uff0c\u76f8\u540c\u57df\u540d\uff0c\u76f8\u540c\u7aef\u53e3\uff0c\u5373\u4e3a\u540c\u6e90\u3002<\/p>\n
\u4e0d\u540c\u6e90\u4e4b\u95f4\u7684\u901a\u4fe1\u5c31\u4f1a\u6709\u8de8\u57df\u95ee\u9898\uff0c\u4e00\u822c\u6765\u8bf4\u662f\u5ba2\u6237\u7aef\u8bbf\u95ee\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u4e0a\u53bb\u914d\u7f6e\u8de8\u57df\u3002 \u6211\u9047\u5230\u7684\u8de8\u57df\u95ee\u9898\u90fd\u662f\u540e\u7aef\u53bb\u914d\u7f6e\u4e00\u4e0b\u5c31\u53ef\u4ee5\u89e3\u51b3\u7684\uff0c\u6bd4\u5982\u6211\u524d\u7aef\u5728\u7528vue\u7684\u5b98\u65b9\u63a8\u8350\u5f02\u6b65\u8bf7\u6c42\u5e93axios\uff0c\u53bb\u8bf7\u6c42\u540e\u7aef\u7684koa\u5f00\u542f\u7684\u540e\u7aef\u670d\u52a1\u65f6\uff0c\u5c31\u4f1a\u9047\u5230\u8de8\u57df\u7684\u95ee\u9898\uff0c\u4f8b\u5982koa\u4f7f\u7528\u4f9d\u8d56koa-cors\u5c31\u53ef\u4ee5\uff0c\u5177\u4f53\u7684\u8bdd\uff0c\u5c31\u662fAccess-Control-Allow-Origin: \u6e90\u540d\uff0c\u53ef\u4ee5\u4e3a*\u6216\u8005\u662f\u7279\u6b8a\u7684\u6e90\u3002\u6216\u8005\u662f\u4f20\u7edf\u7684maven\u6216\u8005nginx\u4e0a\uff0c\u4e5f\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u914d\u7f6e\u8de8\u57df\u3002<\/p>\n
JSONP\u6709\u7528\u8fc7\u5417\uff1fJSONP\u6ca1\u7528\u8fc7\uff0c\u4f46\u662f\u539f\u7406\u8c8c\u4f3c\u662f\u901a\u8fc7js\u52a0\u8f7d\u4e00\u4e2ascript DOM\u6807\u7b7e\u8fdb\u6765\uff0c\u7136\u540e\u5728\u65b0\u7684script\u7684src\u4e2d\u5f15\u5165\u60f3\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002 \u5176\u5b9e\u8de8\u57df\u95ee\u9898\u5728\u540e\u7aef\u4e2d\u4e5f\u6709\u7c7b\u4f3c\u7684\uff0c\u53ea\u4e0d\u8fc7\u662f\u53eb\u505a\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff0c\u6709IPC\uff0cRPC\u7b49\u7b49\u65b9\u5f0f\u8fdb\u884c\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/p>\n
2.\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\u6700\u7ec8\u8f93\u51fa\u4ec0\u4e48\uff1f<\/h3>\n
let<\/span> O = function<\/span>(name){\r\n\u00a0this.name = name || 'world'<\/span>;\r\n};\r\nO.prototype.hello = function<\/span><\/span>(){\r\n\u00a0return<\/span> function<\/span><\/span>(){\r\n\u00a0 console.log('hello '<\/span> + this.name);\r\n\u00a0};\r\n};\r\nlet<\/span> o = new O;\r\nlet<\/span> hello = o.hello();\r\nhello();\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u5e74\u8f7b\u7684\u6211\u7684\u7b54\u6848\u662f\uff1ahello world\u3002<\/p>\n
\u7b54\u6848\u663e\u7136\u662f\u4e0d\u5bf9\u7684\uff0c\u56e0\u4e3a\u8fd9\u662f\u4e00\u9053\u9677\u9631\u9898\uff0c\u9677\u9631\u5c31\u5728\u4e8eO.prototype.hello\u8c03\u7528\u540e\uff0creturn\u7684\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e48\u505a\u7684\u8bdd\uff0c\u5728\u6267\u884c\u65b0\u5b9e\u4f8bo\u7684hello\u65b9\u6cd5\u662f\uff0cthis\u5176\u5b9e\u5df2\u7ecf\u53d8\u6210\u4e86window\u3002<\/p>\n
\u90a3\u4e48\u7b54\u6848\u662fhello undefined\u5417\uff1f<\/p>\n
\u5e74\u8f7b\u7684\u4f60\u53c8\u9519\u4e86\uff0c\u5e76\u4e0d\u662f\u3002<\/p>\n
\u800c\u662f hello \u3002<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u662fhello \uff0c\u800c\u4e0d\u662fhello undefined\uff0c\u800c\u662f\u7a7a\u5b57\u7b26\u4e32<\/p>\n
\u539f\u56e0\u5c31\u5728\u4e8ewindow.name\u662f\u4e8b\u5148\u662f\u6709\u5b9a\u4e49\u7684\uff0c\u800c\u4e14\u5176\u503c\u4e3a\u7a7a\u3002<\/p>\n
\u4e0d\u4fe1\u7684\u8bdd\u4f60\u53ef\u4ee5\u5728\u63a7\u5236\u53f0\u6253\u5370window.name\uff0c\u8fd4\u56de\u7684\u662f””\uff0c\u4f60\u518d\u6253\u5370window.yourname\u8bd5\u8bd5\u770b\uff0c\u6bd4\u5982window.frank\uff0c\u8fd4\u56de\u7684\u5c31\u662fundefined\u4e86\u3002<\/p>\n
\u611f\u8c22@ygh1\u7684\u63d0\u9192\uff0c\u6253\u5370\u7ed3\u679c\u548c\u8fd0\u884c\u73af\u5883\u4e5f\u662f\u6709\u5173\u7684\uff0c\u56e0\u4e3anode\u4e2d\u5168\u5c40\u662fglobal\uff0cbrowser\u4e2d\u5168\u5c40\u662fwindow\u3002<\/p>\n
\u521a\u5728node\u91cc\u8dd1\u4e86\u4e0b\u6709\u9677\u9631\u7684\u9898\u76ee\uff0c\u6253\u5370\u51fa\u6765\u786e\u5b9e\u662fhello undefined\uff0c\u56e0\u4e3anode\u4e2d\u7684global\u5bf9\u8c61\u6ca1\u6709\u521d\u59cb\u7684name\u5c5e\u6027\u3002<\/p>\n
\u6240\u4ee5\u6700\u6b63\u786e\u7684\u7b54\u6848\u5e94\u8be5\u662f\uff1a<\/p>\n
node\u73af\u5883\uff1ahello undefined\r\nbrowser\u73af\u5883\uff1ahello _____(\u975e\u96f6\u5bbd\u7a7a\u5b57\u7b26)\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u800c\u6211\u5728\u5de5\u4f5c\u4e2d\uff0c\u9047\u5230\u7684\u66f4\u591a\u7684\u5e38\u89c1\u7684\u50cf\u4e0a\u9762\u4e00\u6837\u7684\u5de5\u5382\u51fd\u6570\u5f0f\u7684\u5199\u6cd5\u662f\u8fd9\u6837\u7684\u3002<\/p>\n
let<\/span> O = function<\/span>(name){\r\n\u00a0this.name = name || 'world'<\/span>;\r\n};\r\nO.prototype.hello = function<\/span><\/span>(){\r\n\u00a0 console.log('hello '<\/span> + this.name);\r\n};\r\nlet<\/span> o = new O(\"frank\"<\/span>);\r\nlet<\/span> hello = o.hello(\"frank\"<\/span>);\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u6253\u5370\u7ed3\u679c\u4e3a\uff1ahello frank\u3002<\/p>\n
\u5982\u679c\u4e0d\u4f20\u5165frank\u7684\u8bdd\uff0c\u6253\u5370\u51fa\u7684\u662f\u9ed8\u8ba4\u503chello world\u3002<\/p>\n
3.[“1″,”2″,”3”].map(parseInt)\u8fd4\u56de\u7684\u662f\u4ec0\u4e48\uff1f<\/h3>\n
A. [1,2,3] B.[“1″,”2″,”3”] C.[1,1,1] D.\u5176\u4ed6<\/p>\n
\u8fd9\u7279\u4e48\u53c8\u662f\u4e00\u9053\u9677\u9631\u9898\uff0c\u8fd8\u597d\u6211\u4e4b\u524d\u5728\u770bMDN\u7684map\u51fd\u6570\u65f6\uff0c\u770b\u5230\u8fc7\u8fd9\u4e2a\u9677\u9631\u3002<\/p>\n
\u6b63\u786e\u7b54\u6848\u662fD\uff1a\u5176\u4ed6\u3002<\/p>\n
\u5176\u4ed6\u7684\u5177\u4f53\u503c\u4e3a\u591a\u5c11\uff1f[1,NaN,NaN]\u3002<\/p>\n
\u4e0d\u6562\u76f8\u4fe1\u5427\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u662f\u53ef\u7231\u7684[1,2,3]\u5462\uff1f<\/p>\n
\u56e0\u4e3amap\u7684callback\u67093\u4e2a\u53c2\u6570\uff0ccurrentValue\uff0cindex\u548carray\uff0cparseInt\u67092\u4e2a\u53c2\u6570\uff0cstring\u548cradix\uff08\u8fdb\u5236\uff09\uff0c\u53ea\u4f20\u5165parseInt\u5230map\u4e2d\u7684\u8bdd\uff0c\u4f1a\u81ea\u52a8\u5ffd\u7565\u7b2c\u4e09\u4e2a\u53c2\u6570array\uff0c\u4f46\u662f\u4e0d\u4f1a\u5ffd\u7565index\uff0c\u6240\u4ee5\u5c31\u4f1a\u628a0,1,2\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4f20\u7ed9parseInt\u3002<\/p>\n
\u5982\u679c\u8fd8\u4e0d\u660e\u767d\u7684\u8bdd\uff0c\u6211\u4eec\u628a[“1″,”2″,”3”].map(parseInt)\u7684\u6bcf\u4e00\u6b65\u90fd\u62c6\u5f00\u6765\u3002<\/p>\n
parseInt(\"1\"<\/span>,0) \u6b64\u65f6\u5c06\u5b57\u7b26\"1\"<\/span>\u8f6c\u6362\u4e3aO\u8fdb\u5236\u6570\uff0c\u7531\u4e8e0\u8fdb\u5236\u6570\u4e0d\u5b58\u5728\uff0c\u6240\u4ee5\u8fd4\u56deNumber\u7c7b\u578b\u76841\u3002\r\nparseInt(\"2\"<\/span>,1) \u6b64\u65f6\u5c06\u5b57\u7b26\"2\"<\/span>\u8f6c\u6362\u4e3a1\u8fdb\u5236\u6570\uff0c\u7531\u4e8e\u8d85\u51fa\u8fdb\u5236\u65701\uff0c\u6240\u4ee5\u8fd4\u56deNaN\u3002\r\nparseInt(\"3\"<\/span>,2) \u6b64\u65f6\u5c06\u5b57\u7b26\"3\"<\/span>\u8f6c\u6362\u4e3a2\u8fdb\u5236\u6570\uff0c\u7531\u4e8e\u8d85\u51fa\u8fdb\u5236\u65702\uff0c\u6240\u4ee5\u8fd4\u56deNaN\u3002\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u81f3\u6b64\uff0c\u771f\u76f8\u5927\u767d\u3002 \u90a3\u4e48\u5e38\u7528\u7684\u975e\u9677\u9631\u5f0fmap\u5199\u6cd5\u662f\u600e\u6837\u7684\u5462\uff1f<\/p>\n
\u50cf\u8fd9\u6837\uff1a[\"1\",\"2\",\"3\"].map(x=>parseInt(x))<\/code><\/p>\n
\u4f20\u4e00\u4e2a\u5b8c\u6574\u7684\u51fd\u6570\u8fdb\u53bb\uff0c\u6709\u5f62\u53c2\uff0c\u6709callback\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u9020\u6210\u56e0\u4e3a\u53c2\u6570\u4f20\u5165\u9519\u8bef\u800c\u9020\u6210\u7ed3\u679c\u9519\u8bef\u4e86\uff0c\u6700\u540e\u8fd4\u56de\u4e00\u4e2a\u6f02\u6f02\u4eae\u4eae\u7684\u7ecf\u7531\u7eaf\u51fd\u6570\u5904\u7406\u540e\u7684\u65b0\u6570\u7ec4\u56de\u6765\u3002<\/p>\n
\u5176\u5b9e\u8fd9\u91cc\u5982\u679c\u518d\u6df1\u5165\u7684\u8bdd\uff0c\u53ef\u4ee5\u518d\u8003\u5bdf\u7eaf\u51fd\u6570\u662f\u4ec0\u4e48\uff1f<\/p>\n
\u7eaf\u51fd\u6570\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u4e0d\u6539\u53d8\u8f93\u5165\uff0c\u4f46\u662f\u53ef\u4ee5\u501f\u52a9\u8f93\u5165\uff0c\u4ea7\u751f\u4e00\u4e2a\u4ee5\u8f93\u5165\u4e3a\u539f\u6750\u6599\uff0c\u7ecf\u8fc7\u52a0\u5de5\u5904\u7406\u540e\uff0c\u8f93\u51fa\u4e00\u4e2a\u5168\u65b0\u7684\u8f93\u51fa\u7684\u51fd\u6570\uff0c\u5173\u952e\u5728\u4e8e\u4e0d\u6539\u53d8\u8f93\u5165\uff0c\u7eaf\u51fd\u6570\u662f\u7f16\u5199redux\u7684reducer\u5fc5\u987b\u5177\u5907\u7684\u6280\u80fd\u70b9\u3002<\/p>\n
\u521a\u624d\u516c\u53f8\u7684\u5927\u725b\u8fc7\u6765\uff0c\u8bf4\u4ed6\u4ece\u6765\u4e0d\u7528parseInt\uff0c\u4ed6\u7528\u52a0\u53f7\uff0c+”1″ \u8fd4\u56de1\uff0c+”2″\u8fd4\u56de2\u3002\u5927\u725b\u679c\u7136\u5927\u725b\uff0c\u9ed1\u79d1\u6280\u662f\u771f\u7684\u591a\u3002<\/p>\n
4.\u4e0b\u9762\u4ee3\u7801\u4e2d\u201c\u5165\u5e93\u201d\u7684\u989c\u8272\u662f\uff1f<\/h3>\n
<ul class=\"list\"<\/span> id=\"list\"<\/span>>\r\n\u00a0<li class=\"favorite\"<\/span>>\r\n\u00a0 <span>\u51fa\u5e93<\/span>\r\n\u00a0<\/li>\r\n\u00a0<li class=\"favorite\"<\/span>>\r\n\u00a0 <span class=\"highlight\"<\/span>>\u5165\u5e93<\/span>\r\n\u00a0<\/li>\r\n<\/ul>\r\n<style>\r\n#list .favorite:not(#list) .highlight{<\/span>\r\n\u00a0color: red;\r\n}\r\n#list .highlight:nth-of-type(1):nth-last-of-type(1){<\/span>\r\n\u00a0color: blue;\r\n}\r\n<\/style>\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
A. red B.blue C.black<\/p>\n
\u6211\u7684\u7b54\u6848\u662f\uff1a\u6211\u731c\u4e00\u4e0b\uff0c\u53ef\u80fd\u662fA\uff0c\u56e0\u4e3aA\u7684\u6743\u91cd\u662f\u6700\u5927\u7684\uff0c\u4f2a\u7c7b\u9009\u62e9\u5668\u7684\u6743\u503c\u5e94\u8be5\u6bd4\u8f83\u5c0f\u5427\u3002<\/p>\n
\u9762\u8bd5\u5b98\u53d1\u6765\u4e00\u4e2a?\uff0c\u660e\u5929\u53ef\u4ee5\u6765\u516c\u53f8\u9762\u8c08\u5417\uff1f\u5df2\u7ecf\u7ea6\u597d\u660e\u5929\u9762\u8bd5\u3002<\/p>\n
\u8fd9\u9053\u9898\u7684\u89e3\u7b54\u5230\u6b64\u4e3a\u6b62\uff0c\u56e0\u4e3a\u6211\u662f\u771f\u7684\u771f\u7684\u5bf9CSS\u4e0d\u611f\u5174\u8da3\uff0c\u5404\u4f4d\u770b\u5b98\u8001\u7237\u8bf7\u539f\u8c05\u6211\u3002<\/p>\n
\u9762\u8bd5-3 \u672a\u901a\u8fc7<\/h2>\n
1.\u8bf4\u4e0b\u4e0b\u9762\u4e24\u79cdfont-size\u5355\u4f4d\u7684\u5f02\u540c\uff1f<\/h3>\n
em rem<\/p>\n
\u4e8c\u8005\u7684\u4e3a\u4e86\u4fdd\u8bc1\u7528\u6237\u4fee\u6539\u5b57\u4f53\u5927\u5c0f\u65f6\uff0c\u4fdd\u6301\u5782\u76f4\u65b9\u5411\u4e0a\u7684\u5b57\u4f53\u5927\u5c0f\u4e00\u81f4\u3002\u4e0epx\u4e0d\u540c\uff0c\u4e8c\u8005\u90fd\u662f\u5b57\u4f53\u8ba1\u7b97\u5927\u5c0f\u5355\u4f4d\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u9700\u8981\u901a\u8fc7\u8ba1\u7b97\u5f97\u51fa\u5176\u5927\u5c0f\uff0c\u8f6c\u6362\u6210px\uff0c\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u7684rpx\u4e5f\u662f\u8fd9\u6837\uff0c\u6700\u540e\u8fd8\u662f\u8f6c\u6362\u6210\u4e86px\uff0c\u53ef\u80fd\u662f\u501f\u9274\u4e86rem\u7684\u601d\u60f3\u5427\u3002<\/p>\n
\u4f46\u662fem\u76f8\u5bf9\u4e8e\u7ee7\u627f\u6765\u7684\u7236\u5143\u7d20\uff0crem\u76f8\u5bf9\u4e8e\u6839\u5143\u7d20\u3002\u542c\u5927\u725b\u8bf4\uff0crem\u5728\u56fd\u5185\u4f7f\u7528\u6bd4\u8f83\u591a\uff0c\u53ef\u80fd\u4f8d\u4f7f\u7528\u4e60\u60ef\u95ee\u9898\u3002\u6211\u81ea\u5df1\u4e5f\u89c9\u5f97rem\u4f7f\u7528\u8d77\u6765\u66f4\u7b80\u5355\uff0c\u4e3a\u6839\u5143\u7d20\u7684font-size\u8d4b\u4e00\u4e2a\u521d\u59cb\u503c\uff0c\u518d\u914d\u5408css\u7684\u5a92\u4f53\u67e5\u8be2\uff0c\u53ef\u4ee5\u52a8\u6001\u7684\u6539\u53d8\u8fd9\u4e2a\u5168\u5c40\u7684\u5355\u4f4d\uff0c\u53ef\u4ee5\u8bf4\u662f\u7275\u4e00\u53d1\u800c\u52a8\u5168\u8eab\uff0c\u4f7f\u7528\u8d77\u6765\u975e\u5e38\u65b9\u4fbf\uff0c\u800cem\u7684\u53ef\u9605\u8bfb\u6027\u5c31\u5f88\u5dee\u4e86\uff0c\u6709\u7684\u65f6\u5019\u4e3a\u4e86\u7b97\u5b57\u4f53\u5927\u5c0f\uff0c\u9700\u8981\u4e00\u7ea7\u4e00\u7ea7\u627e\u4e0a\u53bb\uff0c\u975e\u5e38\u4e0d\u76f4\u89c2\u3002<\/p>\n
\u73b0\u4ee3\u7684\u5e38\u7528\u7684\u6d4f\u89c8\u5668\uff0c1rem\u7b49\u4e8e16px\uff0c\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7html{font-size:percentage\/num }<\/code>\u6765\u63a7\u5236\u3002<\/p>\n
\u4e3e2\u4e2a rem\u548cem\u4f8b\u5b50\u5bf9\u6bd4\u4e0b\u3002<\/p>\n
html\u7b80\u5199\u7ed3\u6784\uff1a<\/p>\n
<html>\r\n    <body>\r\n        <div><\/div>\r\n    <\/body>\r\n<\/html>\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
rem \u4f8b\u5b50\uff1a<\/p>\n
html { font-size:62.5%; }  \/* =10px *\/\r\nbody { font-size: 2.0rem; } \/* =20px *\/\r\ndiv   { font-size: 1.0rem; } \/* =10px *\/\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
em \u4f8b\u5b50\uff1a<\/p>\n
html { font-size:62.5%; }  \/* =10px *\/\r\nbody { font-size: 2.0em; } \/* =20px *\/\r\ndiv   { font-size: 1.0em; } \/* =20px *\/\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
MDN\u7684font-size\u7ae0\u8282\u7ed9\u51fa\u4e86em\u548crem\u7684\u975e\u5e38\u597d\u7684\u89e3\u91ca\uff0c\u82f1\u6587\u539f\u7248\u975e\u5e38\u76f4\u89c2\uff0c\u6211\u8fd9\u91cc\u518d\u8d34\u4e00\u4e0b\uff1a<\/p>\n
em<\/p>\n
Represents the calculated font-size of the element. If used on the font-size property itself, it represents the inherited font-size of the element.<\/p><\/blockquote>\n
rem<\/p>\n
Represents the font-size of the root element (typically ). When used within the root element font-size, it represents its initial value (a common browser default is 16px, but user-defined preferences may modify this).<\/p><\/blockquote>\n
\u5176\u5b9eem\u548crem\u4e0eMVVM\u6846\u67b6\u7684\u7ec4\u4ef6\u95f4\u901a\u4fe1\u6709\u4e9b\u7c7b\u4f3c\uff0c\u90fd\u6709\u9010\u7ea7\u7ee7\u627f\u548c\u5168\u5c40\u5f71\u54cd\u7684\u6982\u5ff5\u3002em\u662f\u9010\u7ea7\u4f20\u9012\u7684\uff0c\u4e5f\u5c31\u662f\u7ee7\u627f\uff0c\u6846\u67b6\u4e2d\u7528props\u548c\u4e8b\u4ef6\u8ba2\u9605\u53d1\u5e03\u7684\u65b9\u5f0f\u4e5f\u662f\u8fd9\u6837\uff0c\u7237\uff0c\u7236\uff0c\u5b59\u7684\u4f20\u9012\u90fd\u662f\u8981\u4e00\u7ea7\u4e00\u7ea7\u53bb\u4f20\u9012\u7684\uff0c\u7237\u7237\u60f3\u76f4\u63a5\u4f20\u6388\u70b9\u6280\u80fd\u7ed9\u5b59\u5b50\u5fc5\u987b\u5148\u4f20\u6388\u7ed9\u7236\u4eb2\uff0c\u7237\u7237\u2192\u7236\u4eb2\u2192\u5b59\u5b50<\/strong>\uff1b\u800crem\u5c31\u548c\u6846\u67b6\u4e2d\u7684\u72b6\u6001\u7ba1\u7406\u5e93\u5f88\u50cf\uff0c\u4f8b\u5982vuex\u548credux\uff0c\u62bd\u53d6\u51fa\u4e00\u4e2a\u5168\u5c40\u7684\u72b6\u6001\u6811\uff0c\u4e0d\u7528\u4e00\u7ea7\u4e00\u7ea7\u7684\u53bb\u5f88\u590d\u6742\u7684\u53bb\u7ee7\u627f\uff0c\u7237\u7237\u60f3\u6559\u6559\u5b59\u5b50\uff0c\u76f4\u63a5\u5c31\u53ef\u4ee5\u4f20\u6388\u7ed9\u5b59\u5b50\uff0c\u7237\u7237\u2192\u5b59\u5b50<\/strong>\u3002<\/p>\n
2.\u53ea\u7528\u4e00\u4e2adiv \u5b9e\u73b0\u5b9a\u65f6\u7ea2\u7eff\u706f<\/h3>\n
<\/svg>” alt=”default” data-src=”https:\/\/user-gold-cdn.xitu.io\/2019\/4\/20\/16a39eec4f11f43b?imageslim” data-width=”618″ data-height=”222″ \/>
<\/figcaption><\/figure>\n
<!DOCTYPE html>\r\n<html lang=\"zh-cn\"<\/span>>\r\n    <head>\r\n        <meta charset=\"utf-8\"<\/span> \/>\r\n        <title>\u4ec5\u7528\u4e00\u4e2aDIV\u5b9e\u73b0\u7ea2\u7eff\u706f<\/title>\r\n        <style>\r\n        \t@keyframes light{\r\n        \t\t0%{\r\n        \t\t\tbackground-color: green;\r\n        \t\t\tleft: 0;\r\n        \t\t}\r\n        \t\t33.3%{\r\n        \t\t\tbackground-color: green;\r\n        \t\t\tleft: 0;\r\n        \t\t}\r\n        \t\t33.4%{\r\n        \t\t\tbackground-color: yellow;\r\n        \t\t\tleft: 200px;\r\n        \t\t}\r\n        \t\t66.6%{\r\n        \t\t\tbackground-color: yellow;\r\n        \t\t\tleft: 200px;\r\n        \t\t}\r\n        \t\t66.7%{\r\n        \t\t\tbackground-color: red;\r\n        \t\t\tleft: 400px;\r\n        \t\t}\r\n        \t\t99.9%{\r\n\t       \t\t\tbackground-color: red;\r\n        \t\t\tleft: 400px;\r\n        \t\t}\r\n        \t}\r\n        \t.traffic-light{\r\n        \t\tposition: relative;\r\n        \t\twidth: 200px;\r\n        \t\theight: 200px;\r\n        \t\tborder-radius: 50%;\r\n        \t\tanimation: light 3s ease-in-out 0s infinite;\r\n        \t}\r\n        \t.container{\r\n        \t\twidth: 600px;\r\n        \t\tborder:10px solid #000;<\/span>\r\n        \t\tborder-radius: 20% 20%;\r\n        \t}\r\n        <\/style>\r\n    <\/head>\r\n    <body>\r\n    \t<div class=\"container\"<\/span>>\r\n    \t\t<div class=\"traffic-light\"<\/span>><\/div>\r\n    \t<\/div>\r\n    <\/body>\r\n<\/html>\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u9762\u8bd5-4<\/h2>\n
\u7531\u4e8e\u79cd\u79cd\u539f\u56e0\uff0c\u5f00\u59cb\u4e86\u65b0\u4e00\u8f6e\u7684\u9762\u8bd5\uff0c\u8fd9\u4e00\u8f6e\u9762\u8bd5\u53ef\u8c13\u6536\u83b7\u9887\u4e30\u3002 \u4e0e\u5404\u79cd\u5404\u6837\u7684\u9762\u8bd5\u5b98\u4ea4\u6d41\u4e0b\u6765\uff0c\u9664\u4e86\u6536\u83b7\u5230\u4e00\u4e9b\u758f\u6f0f\u7684\u77e5\u8bc6\u70b9\u5916\uff0c\u53d1\u73b0\u9762\u8bd5\u5176\u5b9e\u975e\u5e38\u8003\u9a8c\u9762\u8bd5\u5b98\u7684\u6c34\u5e73\u3002\u63e3\u6469\u51fa\u4e00\u4e9b\u5982\u4f55\u6210\u4e3a\u4e00\u540d\u5408\u683c\u7684\u524d\u7aef\u9762\u8bd5\u5b98\u65b9\u6cd5\u3002<\/p>\n
\u4ee5\u53ca\u5f88\u91cd\u8981\u7684\u8001\u54e5\u7684\u7ecf\u9a8c\uff1a\u8fdb\u5927\u5382\u524d\u5fc5\u987b\u8981\u505a\u7684\u51c6\u5907\uff0c\u63d0\u524d\u4e00\u4e2a\u6708\u5237\u9898\u3002<\/p>\n
1.setTimeout\u4e0e\u51fd\u6570\u8c03\u7528\u6808<\/h3>\n
console.log(1);\r\nset<\/span>Timeout(function<\/span><\/span>(){\r\n    console.log(2);\r\n},0);\r\nconsole.log(3);\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u8f93\u51fa\uff1a1 3 2 \u539f\u56e0\uff1aCall Stack\u4f1a\u6700\u540e\u8c03\u7528setTimeout\u7684callback\uff0csetTimeout\u4e2d\u7684callback\u662f\u4e00\u4e2a\u5f02\u6b65\u51fd\u6570\u3002 \u51fd\u6570\u8c03\u7528\u6808\u7684\u90e8\u5206\u53ef\u4ee5\u53c2\u8003\u8fd9\u91cc\uff1ablog.risingstack.com\/node-js-at-\u2026<\/a><\/p>\n
2.function foo \u4e0e var foo\u7684\u63d0\u5347\u4f18\u5148\u7ea7<\/h3>\n
console.log(typeof foo);\r\nvar foo = \"foo\"<\/span>;\r\nfunction<\/span> foo<\/span><\/span>(){}\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u8f93\u51fa\uff1afunction<\/p>\n
console.log(typeof foo);\r\nfunction<\/span> foo<\/span><\/span>(){}\r\nvar foo = \"foo\"<\/span>;\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u8f93\u51fa\uff1afunction<\/p>\n
function\u4f18\u5148\u7ea7\u6bd4var\u9ad8\uff0c\u65e0\u8bba\u5728\u5176\u524d\u540e\uff0c\u90fd\u4f1a\u8986\u76d6\u6389\u540c\u540d\u7684var\u58f0\u660e\u3002<\/p>\n
3.let \u5757\u4f5c\u7528\u57df \u4e0e setTimeout<\/h3>\n
for<\/span>(let<\/span> i=0;i<6;i++){\r\n    set<\/span>Timeout(function<\/span><\/span>(){\r\n        console.log(i)\r\n    },0)\r\n}\r\nconsole.log(i)\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n
\u8f93\u51fa\uff1a<\/p>\n
0\r\nUncaught ReferenceError: i is not defined\r\n1\r\n2\r\n3\r\n4\r\n5\r\n\u590d\u5236\u4ee3\u7801<\/span><\/code><\/pre>\n