\u57fa\u672c\u4e0a\uff0cthis\u6307\u7684\u662f\u5f53\u524d\u6b63\u5728\u6267\u884c\u6216\u8c03\u7528\u8be5\u51fd\u6570\u7684\u5bf9\u8c61\u7684\u503c\u3002this\u503c\u7684\u53d8\u5316\u53d6\u51b3\u4e8e\u6211\u4eec\u4f7f\u7528 \u5b83\u7684\u4e0a\u4e0b\u6587\u548c\u6211\u4eec\u5728\u54ea\u91cc\u4f7f\u7528\u5b83\u3002
\nconst carDetails = {
\nname\uff1a "Ford Mustang",
\nyearBought: 2005,
\ngetName () {
\nreturn this. name\uff1b
\n},
\nisRegistered\uff1a true
\n};
\nconsole. log(carDetails. getName())\uff1b \/\/ Ford Mustang
\n\u8fd9\u901a\u5e38\u662f\u6211\u4eec\u671f\u671b\u7ed3\u679c\u7684\uff0c\u56e0\u4e3a\u5728getName\u65b9\u6cd5\u4e2d\u6211\u4eec\u8fd4\u56dethis. name,\u5728\u6b64\u4e0a\u4e0b\u6587\u4e2d\uff0cthis \u6307\u5411\u7684\u662fcarDetails\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u5f53\u524d\u662f\u6267\u884c\u51fd\u6570\u7684\u201c\u6240\u6709\u8005\u201d\u5bf9\u8c61\u3002
\n\u63a5\u4e0b\u6211\u4eec\u505a\u4e9b\u5947\u602a\u7684\u4e8b\u60c5\uff1a
\nvar name = "Ford Ranger"\uff1b
\nvar getCarName = carDetails. getName\uff1b
\nconsole. log(getCarName()); \/\/ Ford Ranger
\n\u4e0a\u9762\u6253\u5370Ford Ranger,\u8fd9\u5f88\u5947\u602a\uff0c\u56e0\u4e3a\u5728\u7b2c\u4e00\u4e2aconsole, log\u8bed\u53e5\u4e2d\u6253\u5370\u7684\u662fFord Mustango \u8fd9\u6837\u505a\u7684\u539f\u56e0\u662fgetCarName\u65b9\u6cd5\u6709\u4e00\u4e2a\u4e0d\u540c\u7684\u201c\u6240\u6709\u8005\u201d\u5bf9\u8c61\uff0c\u5373window\u5bf9\u8c61\u3002\u5728\u5168\u5c40\u4f5c\u7528 \u57df\u4e2d\u4f7f\u7528var\u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\u4f1a\u5728window\u5bf9\u8c61\u4e2d\u9644\u52a0\u4e0e\u53d8\u91cf\u540d\u79f0\u76f8\u540c\u7684\u5c5e\u6027\u3002\u8bf7\u8bb0\u4f4f\uff0c\u5f53\u6ca1 \u6709\u4f7f\u7528"use strict"\u65f6\uff0c\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2dthis\u6307\u7684\u662fwindow\u5bf9\u8c61\u3002
\nconsole. log(getCarName === window. getCarName) \uff1b \/\/ true console, log (getCarName ===
\nthis. getCarName)\uff1b \/\/ true
\n\u672c\u4f8b\u4e2d\u7684this\u548cwindow\u5f15\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u5728\u51fd\u6570\u4e2d\u4f7f\u7528apply\u548ccall\u65b9\u6cd5\u3002
\nconsole. log(getCarName. apply(carDetails)) \uff1b \/\/ Ford Mustang console. log(getCarName. call (carDetails)) \uff1b \/\/ Ford Mustang apply\u548ccall\u65b9\u6cd5\u671f\u671b\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u662f\u51fd\u6570\u5185\u90e8this\u7684\u503c\u3002
\nIIFE\u6216\u7acb\u5373\u6267\u884c\u7684\u51fd\u6570\u8868\u8fbe\u5f0f\uff0c\u5728\u5168\u5c40\u4f5c\u7528\u57df\u5185\u58f0\u660e\u7684\u51fd\u6570\uff0c\u5bf9\u8c61\u5185\u90e8\u65b9\u6cd5\u4e2d\u7684\u533f\u540d\u51fd\u6570\u548c \u5185\u90e8\u51fd\u6570\u7684this\u5177\u6709\u9ed8\u8ba4\u503c\uff0c\u8be5\u503c\u6307\u5411window\u5bf9\u8c61\u3002
\n(function () {
\nconsole. log(this)\uff1b
\n}) 0; \/\/ \u6253\u5370"window"\u5bf9\u8c61
\nfunction iHateThis(){
\nconsole. log(this)\uff1b
\n}
\niHateThis();\/\/\u6253\u5370\u201cwindow\u201d\u5bf9\u8c61
\nconst myFavoriteObj = {
\nguessThis() {
\nfunction getName(){
\nconsole. log (this, name)\uff1b
\n}
\ngetName ()\uff1b
\n},
\nname\uff1a ‘Marko Polo’,
\nthisIsAnnoying(callback){
\ncallback ();
\n}
\n};
\nmyFavoriteObj. guessThisO; \/\/ \u6253\u5370"window"\u5bf9\u8c61
\nmyFavoriteObj. thisIsAnnoying(function () {
\nconsole. log (this) \uff1b \/\/ \u6253\u5370"window"\u5bf9\u8c61
\n});
\n\u5982\u679c\u6211\u4eec\u8981\u83b7\u53d6myFavoriteObj\u5bf9\u8c61\u4e2d\u7684name\u5c5e\u6027\uff08\u5373Marko Polo\uff09\u7684\u503c\uff0c\u5219\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef \u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\u3002
\n\u4e00\u79cd\u662f\u5c06this\u503c\u4fdd\u5b58\u5728\u53d8\u91cf\u4e2d\u3002
\nconst myFavoriteObj = {
\nguessThis() {
\nconst self = this\uff1b \/\/ \u628a this \u503c\u4fdd\u5b58\u5728 self \u53d8\u91cf\u4e2d
\nfunction getName(){
\nconsole. log(self. name)\uff1b
\n}
\ngetName ();
\n}, name\uff1a ‘ Marko Polo’, thisIsAnnoying(callback) {
\ncallback() \uff1b
\n}
\n};
\n\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528\u7bad\u5934\u51fd\u6570
\nconst myFavoriteObj = {
\nguessThis () {
\nconst getName =()=>{
\nconsole. log(this. name)\uff1b
\n}
\ngetName()\uff1b
\n},
\nname\uff1a ‘Marko Polo’,
\nthisIsAnnoying(callback) {
\ncallback() ;
\n}
\n};
\n\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684this\u3002\u5b83\u590d\u5236\u4e86\u8fd9\u4e2a\u5c01\u95ed\u7684\u8bcd\u6cd5\u4f5c\u7528\u57df\u4e2dthis\u503c\uff0c\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cthis \u503c\u5728getName\u5185\u90e8\u51fd\u6570\u4e4b\u5916\uff0c\u4e5f\u5c31\u662fmyFavoriteObj\u5bf9\u8c61!<\/p>\n","protected":false},"excerpt":{"rendered":"
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