\u5c06”use strict”\u653e\u5728\u811a\u672c\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\uff0c\u5219\u6574\u4e2a\u811a\u672c\u90fd\u5c06\u4ee5”\u4e25\u683c\u6a21\u5f0f”\u8fd0\u884c\u3002\u5982\u679c\u8fd9\u884c\u8bed\u53e5\u4e0d\u5728\u7b2c\u4e00\u884c\uff0c\u5219\u65e0\u6548\uff0c\u6574\u4e2a\u811a\u672c\u4ee5”\u6b63\u5e38\u6a21\u5f0f”\u8fd0\u884c\u3002\u5982\u679c\u4e0d\u540c\u6a21\u5f0f\u7684\u4ee3\u7801\u6587\u4ef6\u5408\u5e76\u6210\u4e00\u4e2a\u6587\u4ef6\uff0c\u8fd9\u4e00\u70b9\u9700\u8981\u7279\u522b\u6ce8\u610f\u3002<\/p>\n
(\u4e25\u683c\u5730\u8bf4\uff0c\u53ea\u8981\u524d\u9762\u4e0d\u662f\u4ea7\u751f\u5b9e\u9645\u8fd0\u884c\u7ed3\u679c\u7684\u8bed\u53e5\uff0c”use strict”\u53ef\u4ee5\u4e0d\u5728\u7b2c\u4e00\u884c\uff0c\u6bd4\u5982\u76f4\u63a5\u8ddf\u5728\u4e00\u4e2a\u7a7a\u7684\u5206\u53f7\u540e\u9762\u3002)<\/p>\n
\n\u3000\u3000<script>
\n“use strict”;
\nconsole.log(“\u8fd9\u662f\u4e25\u683c\u6a21\u5f0f\u3002”);
\n<\/script><\/p>\n
\u3000\u3000<script>
\nconsole.log(“\u8fd9\u662f\u6b63\u5e38\u6a21\u5f0f\u3002”);kly, it’s almost 2 years ago now. I can admit it now – I run it on my school’s network that has about 50 computers.
\n<\/script><\/p>\n<\/blockquote>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u8868\u793a\uff0c\u4e00\u4e2a\u7f51\u9875\u4e2d\u4f9d\u6b21\u6709\u4e24\u6bb5Javascript\u4ee3\u7801\u3002\u524d\u4e00\u4e2ascript\u6807\u7b7e\u662f\u4e25\u683c\u6a21\u5f0f\uff0c\u540e\u4e00\u4e2a\u4e0d\u662f\u3002<\/p>\n
3.2 \u9488\u5bf9\u5355\u4e2a\u51fd\u6570<\/strong><\/p>\n\u5c06”use strict”\u653e\u5728\u51fd\u6570\u4f53\u7684\u7b2c\u4e00\u884c\uff0c\u5219\u6574\u4e2a\u51fd\u6570\u4ee5”\u4e25\u683c\u6a21\u5f0f”\u8fd0\u884c\u3002<\/p>\n
\n\u3000\u3000function strict(){
\n“use strict”;
\nreturn “\u8fd9\u662f\u4e25\u683c\u6a21\u5f0f\u3002”;
\n}<\/p>\n
\u3000\u3000function notStrict() {
\nreturn “\u8fd9\u662f\u6b63\u5e38\u6a21\u5f0f\u3002”;
\n}<\/p>\n<\/blockquote>\n
3.3 \u811a\u672c\u6587\u4ef6\u7684\u53d8\u901a\u5199\u6cd5<\/strong><\/p>\n\u56e0\u4e3a\u7b2c\u4e00\u79cd\u8c03\u7528\u65b9\u6cd5\u4e0d\u5229\u4e8e\u6587\u4ef6\u5408\u5e76\uff0c\u6240\u4ee5\u66f4\u597d\u7684\u505a\u6cd5\u662f\uff0c\u501f\u7528\u7b2c\u4e8c\u79cd\u65b9\u6cd5\uff0c\u5c06\u6574\u4e2a\u811a\u672c\u6587\u4ef6\u653e\u5728\u4e00\u4e2a\u7acb\u5373\u6267\u884c\u7684\u533f\u540d\u51fd\u6570\u4e4b\u4e2d\u3002<\/p>\n
\n\u3000\u3000(function (){<\/p>\n
“use strict”;<\/p>\n
\u3000\u3000\u3000\u3000\/\/ some code here<\/p>\n
})();<\/p>\n<\/blockquote>\n
\u56db\u3001\u8bed\u6cd5\u548c\u884c\u4e3a\u6539\u53d8<\/strong><\/p>\n\u4e25\u683c\u6a21\u5f0f\u5bf9Javascript\u7684\u8bed\u6cd5\u548c\u884c\u4e3a\uff0c\u90fd\u505a\u4e86\u4e00\u4e9b\u6539\u53d8\u3002<\/p>\n
4.1 \u5168\u5c40\u53d8\u91cf\u663e\u5f0f\u58f0\u660e<\/strong><\/p>\n\u5728\u6b63\u5e38\u6a21\u5f0f\u4e2d\uff0c\u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u6ca1\u6709\u58f0\u660e\u5c31\u8d4b\u503c\uff0c\u9ed8\u8ba4\u662f\u5168\u5c40\u53d8\u91cf\u3002\u4e25\u683c\u6a21\u5f0f\u7981\u6b62\u8fd9\u79cd\u7528\u6cd5\uff0c\u5168\u5c40\u53d8\u91cf\u5fc5\u987b\u663e\u5f0f\u58f0\u660e\u3002<\/p>\n
\n“use strict”;<\/p>\n
\u3000\u3000v = 1; \/\/ \u62a5\u9519\uff0cv\u672a\u58f0\u660e<\/p>\n
\u3000\u3000for(i = 0; i < 2; i++) { \/\/ \u62a5\u9519\uff0ci\u672a\u58f0\u660e
\n}<\/p>\n<\/blockquote>\n
\u56e0\u6b64\uff0c\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u53d8\u91cf\u90fd\u5fc5\u987b\u5148\u7528var\u547d\u4ee4\u58f0\u660e\uff0c\u7136\u540e\u518d\u4f7f\u7528\u3002<\/p>\n
4.2 \u9759\u6001\u7ed1\u5b9a<\/strong><\/p>\nJavascript\u8bed\u8a00\u7684\u4e00\u4e2a\u7279\u70b9\uff0c\u5c31\u662f\u5141\u8bb8”\u52a8\u6001\u7ed1\u5b9a”\uff0c\u5373\u67d0\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\u5230\u5e95\u5c5e\u4e8e\u54ea\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4e0d\u662f\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u7684\uff0c\u800c\u662f\u5728\u8fd0\u884c\u65f6\uff08runtime\uff09\u786e\u5b9a\u7684\u3002<\/p>\n
\u4e25\u683c\u6a21\u5f0f\u5bf9\u52a8\u6001\u7ed1\u5b9a\u505a\u4e86\u4e00\u4e9b\u9650\u5236\u3002\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ea\u5141\u8bb8\u9759\u6001\u7ed1\u5b9a\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5c5e\u6027\u548c\u65b9\u6cd5\u5230\u5e95\u5f52\u5c5e\u54ea\u4e2a\u5bf9\u8c61\uff0c\u5728\u7f16\u8bd1\u9636\u6bb5\u5c31\u786e\u5b9a\u3002\u8fd9\u6837\u505a\u6709\u5229\u4e8e\u7f16\u8bd1\u6548\u7387\u7684\u63d0\u9ad8\uff0c\u4e5f\u4f7f\u5f97\u4ee3\u7801\u66f4\u5bb9\u6613\u9605\u8bfb\uff0c\u66f4\u5c11\u51fa\u73b0\u610f\u5916\u3002<\/p>\n
\u5177\u4f53\u6765\u8bf4\uff0c\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u3002<\/p>\n
\uff081\uff09\u7981\u6b62\u4f7f\u7528with\u8bed\u53e5<\/strong><\/p>\n\u56e0\u4e3awith\u8bed\u53e5\u65e0\u6cd5\u5728\u7f16\u8bd1\u65f6\u5c31\u786e\u5b9a\uff0c\u5c5e\u6027\u5230\u5e95\u5f52\u5c5e\u54ea\u4e2a\u5bf9\u8c61\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var v = 1;<\/p>\n
\u3000\u3000with (o){ \/\/ \u8bed\u6cd5\u9519\u8bef
\nv = 2;
\n}<\/p>\n<\/blockquote>\n
\uff082\uff09\u521b\u8bbeeval\u4f5c\u7528\u57df<\/strong><\/p>\n\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0cJavascript\u8bed\u8a00\u6709\u4e24\u79cd\u53d8\u91cf\u4f5c\u7528\u57df\uff08scope\uff09\uff1a\u5168\u5c40\u4f5c\u7528\u57df\u548c\u51fd\u6570\u4f5c\u7528\u57df\u3002\u4e25\u683c\u6a21\u5f0f\u521b\u8bbe\u4e86\u7b2c\u4e09\u79cd\u4f5c\u7528\u57df\uff1aeval\u4f5c\u7528\u57df\u3002<\/p>\n
\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0ceval\u8bed\u53e5\u7684\u4f5c\u7528\u57df\uff0c\u53d6\u51b3\u4e8e\u5b83\u5904\u4e8e\u5168\u5c40\u4f5c\u7528\u57df\uff0c\u8fd8\u662f\u5904\u4e8e\u51fd\u6570\u4f5c\u7528\u57df\u3002\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0ceval\u8bed\u53e5\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u4f5c\u7528\u57df\uff0c\u4e0d\u518d\u80fd\u591f\u751f\u6210\u5168\u5c40\u53d8\u91cf\u4e86\uff0c\u5b83\u6240\u751f\u6210\u7684\u53d8\u91cf\u53ea\u80fd\u7528\u4e8eeval\u5185\u90e8\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var x = 2;<\/p>\n
\u3000\u3000console.info(eval(“var x = 5; x”)); \/\/ 5<\/p>\n
\u3000\u3000console.info(x); \/\/ 2<\/p>\n<\/blockquote>\n
4.3 \u589e\u5f3a\u7684\u5b89\u5168\u63aa\u65bd<\/strong><\/p>\n\uff081\uff09\u7981\u6b62this\u5173\u952e\u5b57\u6307\u5411\u5168\u5c40\u5bf9\u8c61<\/strong><\/p>\n\n\u3000\u3000function f(){
\nreturn !this;
\n}
\n\/\/ \u8fd4\u56defalse\uff0c\u56e0\u4e3a”this”\u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff0c”!this”\u5c31\u662ffalse<\/p>\n
\u3000\u3000function f(){
\n“use strict”;
\nreturn !this;
\n}
\n\/\/ \u8fd4\u56detrue\uff0c\u56e0\u4e3a\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0cthis\u7684\u503c\u4e3aundefined\uff0c\u6240\u4ee5”!this”\u4e3atrue\u3002<\/p>\n<\/blockquote>\n
\u56e0\u6b64\uff0c\u4f7f\u7528\u6784\u9020\u51fd\u6570\u65f6\uff0c\u5982\u679c\u5fd8\u4e86\u52a0new\uff0cthis\u4e0d\u518d\u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff0c\u800c\u662f\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000function f(){<\/p>\n
\u3000\u3000\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000\u3000\u3000this.a = 1;<\/p>\n
\u3000\u3000};<\/p>\n
\u3000\u3000f();\/\/ \u62a5\u9519\uff0cthis\u672a\u5b9a\u4e49<\/p>\n<\/blockquote>\n
\uff082\uff09\u7981\u6b62\u5728\u51fd\u6570\u5185\u90e8\u904d\u5386\u8c03\u7528\u6808<\/strong><\/p>\n\n\u3000\u3000function f1(){<\/p>\n
\u3000\u3000\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000\u3000\u3000f1.caller; \/\/ \u62a5\u9519<\/p>\n
\u3000\u3000\u3000\u3000f1.arguments; \/\/ \u62a5\u9519<\/p>\n
\u3000\u3000}<\/p>\n
\u3000\u3000f1();<\/p>\n<\/blockquote>\n
4.4 \u7981\u6b62\u5220\u9664\u53d8\u91cf<\/strong><\/p>\n\u4e25\u683c\u6a21\u5f0f\u4e0b\u65e0\u6cd5\u5220\u9664\u53d8\u91cf\u3002\u53ea\u6709configurable\u8bbe\u7f6e\u4e3atrue\u7684\u5bf9\u8c61\u5c5e\u6027\uff0c\u624d\u80fd\u88ab\u5220\u9664\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var x;<\/p>\n
\u3000\u3000delete x; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000var o = Object.create(null, {‘x’: {
\nvalue: 1,
\nconfigurable: true
\n}});<\/p>\n
\u3000\u3000delete o.x; \/\/ \u5220\u9664\u6210\u529f<\/p>\n<\/blockquote>\n
4.5 \u663e\u5f0f\u62a5\u9519<\/strong><\/p>\n\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0c\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u7684\u53ea\u8bfb\u5c5e\u6027\u8fdb\u884c\u8d4b\u503c\uff0c\u4e0d\u4f1a\u62a5\u9519\uff0c\u53ea\u4f1a\u9ed8\u9ed8\u5730\u5931\u8d25\u3002\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u5c06\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
var o = {};<\/p>\n
\u3000\u3000Object.defineProperty(o, “v”, { value: 1, writable: false });<\/p>\n
\u3000\u3000o.v = 2; \/\/ \u62a5\u9519<\/p>\n<\/blockquote>\n
\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u5bf9\u4e00\u4e2a\u4f7f\u7528getter\u65b9\u6cd5\u8bfb\u53d6\u7684\u5c5e\u6027\u8fdb\u884c\u8d4b\u503c\uff0c\u4f1a\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
var o = {<\/p>\n
get v() { return 1; }<\/p>\n
\u3000\u3000};<\/p>\n
\u3000\u3000o.v = 2; \/\/ \u62a5\u9519<\/p>\n<\/blockquote>\n
\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u5bf9\u7981\u6b62\u6269\u5c55\u7684\u5bf9\u8c61\u6dfb\u52a0\u65b0\u5c5e\u6027\uff0c\u4f1a\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var o = {};<\/p>\n
\u3000\u3000Object.preventExtensions(o);<\/p>\n
\u3000\u3000o.v = 1; \/\/ \u62a5\u9519<\/p>\n<\/blockquote>\n
\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u5220\u9664\u4e00\u4e2a\u4e0d\u53ef\u5220\u9664\u7684\u5c5e\u6027\uff0c\u4f1a\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000delete Object.prototype; \/\/ \u62a5\u9519<\/p>\n<\/blockquote>\n
4.6 \u91cd\u540d\u9519\u8bef<\/strong><\/p>\n\u4e25\u683c\u6a21\u5f0f\u65b0\u589e\u4e86\u4e00\u4e9b\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n
\uff081\uff09\u5bf9\u8c61\u4e0d\u80fd\u6709\u91cd\u540d\u7684\u5c5e\u6027<\/strong><\/p>\n\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u5bf9\u8c61\u6709\u591a\u4e2a\u91cd\u540d\u5c5e\u6027\uff0c\u6700\u540e\u8d4b\u503c\u7684\u90a3\u4e2a\u5c5e\u6027\u4f1a\u8986\u76d6\u524d\u9762\u7684\u503c\u3002\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u8fd9\u5c5e\u4e8e\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var o = {
\np: 1,
\np: 2
\n}; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n<\/blockquote>\n
\n
\uff082\uff09\u51fd\u6570\u4e0d\u80fd\u6709\u91cd\u540d\u7684\u53c2\u6570<\/strong><\/p>\n\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u51fd\u6570\u6709\u591a\u4e2a\u91cd\u540d\u7684\u53c2\u6570\uff0c\u53ef\u4ee5\u7528arguments[i]\u8bfb\u53d6\u3002\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u8fd9\u5c5e\u4e8e\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000function f(a, a, b) { \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000\u3000\u3000return ;<\/p>\n
\u3000\u3000}<\/p>\n<\/blockquote>\n
4.7 \u7981\u6b62\u516b\u8fdb\u5236\u8868\u793a\u6cd5<\/strong><\/p>\n\u6b63\u5e38\u6a21\u5f0f\u4e0b\uff0c\u6574\u6570\u7684\u7b2c\u4e00\u4f4d\u5982\u679c\u662f0\uff0c\u8868\u793a\u8fd9\u662f\u516b\u8fdb\u5236\u6570\uff0c\u6bd4\u59820100\u7b49\u4e8e\u5341\u8fdb\u5236\u768464\u3002\u4e25\u683c\u6a21\u5f0f\u7981\u6b62\u8fd9\u79cd\u8868\u793a\u6cd5\uff0c\u6574\u6570\u7b2c\u4e00\u4f4d\u4e3a0\uff0c\u5c06\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var n = 0100; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n<\/blockquote>\n
4.8 arguments\u5bf9\u8c61\u7684\u9650\u5236<\/strong><\/p>\narguments\u662f\u51fd\u6570\u7684\u53c2\u6570\u5bf9\u8c61\uff0c\u4e25\u683c\u6a21\u5f0f\u5bf9\u5b83\u7684\u4f7f\u7528\u505a\u4e86\u9650\u5236\u3002<\/p>\n
\uff081\uff09\u4e0d\u5141\u8bb8\u5bf9arguments\u8d4b\u503c<\/strong><\/p>\n\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000arguments++; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000var obj = { set p(arguments) { } }; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000try { } catch (arguments) { } \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000function arguments() { } \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000var f = new Function(“arguments”, “‘use strict’; return 17;”); \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n<\/blockquote>\n
\uff082\uff09arguments\u4e0d\u518d\u8ffd\u8e2a\u53c2\u6570\u7684\u53d8\u5316<\/strong><\/p>\n\n\u3000\u3000function f(a) {<\/p>\n
\u3000\u3000\u3000\u3000a = 2;<\/p>\n
\u3000\u3000\u3000\u3000return [a, arguments[0]];<\/p>\n
\u3000\u3000}<\/p>\n
\u3000\u3000f(1); \/\/ \u6b63\u5e38\u6a21\u5f0f\u4e3a[2,2]<\/p>\n
\u3000\u3000function f(a) {<\/p>\n
\u3000\u3000\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000\u3000\u3000a = 2;<\/p>\n
\u3000\u3000\u3000\u3000return [a, arguments[0]];<\/p>\n
\u3000\u3000}<\/p>\n
\u3000\u3000f(1); \/\/ \u4e25\u683c\u6a21\u5f0f\u4e3a[2,1]<\/p>\n<\/blockquote>\n
\uff083\uff09\u7981\u6b62\u4f7f\u7528arguments.callee<\/strong><\/p>\n\u8fd9\u610f\u5473\u7740\uff0c\u4f60\u65e0\u6cd5\u5728\u533f\u540d\u51fd\u6570\u5185\u90e8\u8c03\u7528\u81ea\u8eab\u4e86\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000var f = function() { return arguments.callee; };<\/p>\n
\u3000\u3000f(); \/\/ \u62a5\u9519<\/p>\n<\/blockquote>\n
4.9 \u51fd\u6570\u5fc5\u987b\u58f0\u660e\u5728\u9876\u5c42<\/strong><\/p>\n\u5c06\u6765Javascript\u7684\u65b0\u7248\u672c\u4f1a\u5f15\u5165”\u5757\u7ea7\u4f5c\u7528\u57df”\u3002\u4e3a\u4e86\u4e0e\u65b0\u7248\u672c\u63a5\u8f68\uff0c\u4e25\u683c\u6a21\u5f0f\u53ea\u5141\u8bb8\u5728\u5168\u5c40\u4f5c\u7528\u57df\u6216\u51fd\u6570\u4f5c\u7528\u57df\u7684\u9876\u5c42\u58f0\u660e\u51fd\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u5141\u8bb8\u5728\u975e\u51fd\u6570\u7684\u4ee3\u7801\u5757\u5185\u58f0\u660e\u51fd\u6570\u3002<\/p>\n
\n\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000if (true) {<\/p>\n
\u3000\u3000\u3000\u3000function f() { } \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000}<\/p>\n
\u3000\u3000for (var i = 0; i < 5; i++) {<\/p>\n
\u3000\u3000\u3000\u3000function f2() { } \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000}<\/p>\n<\/blockquote>\n
4.10 \u4fdd\u7559\u5b57<\/strong><\/p>\n\u4e3a\u4e86\u5411\u5c06\u6765Javascript\u7684\u65b0\u7248\u672c\u8fc7\u6e21\uff0c\u4e25\u683c\u6a21\u5f0f\u65b0\u589e\u4e86\u4e00\u4e9b\u4fdd\u7559\u5b57\uff1aimplements, interface, let, package, private, protected, public, static, yield\u3002<\/p>\n
\u4f7f\u7528\u8fd9\u4e9b\u8bcd\u4f5c\u4e3a\u53d8\u91cf\u540d\u5c06\u4f1a\u62a5\u9519\u3002<\/p>\n
\n\u3000\u3000function package(protected) { \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000\u3000\u3000”use strict”;<\/p>\n
\u3000\u3000\u3000\u3000var implements; \/\/ \u8bed\u6cd5\u9519\u8bef<\/p>\n
\u3000\u3000}<\/p>\n<\/blockquote>\n
\u6b64\u5916\uff0cECMAscript\u7b2c\u4e94\u7248\u672c\u8eab\u8fd8\u89c4\u5b9a\u4e86\u53e6\u4e00\u4e9b\u4fdd\u7559\u5b57\uff08class, enum, export, extends, import, super\uff09\uff0c\u4ee5\u53ca\u5404\u5927\u6d4f\u89c8\u5668\u81ea\u884c\u589e\u52a0\u7684const\u4fdd\u7559\u5b57\uff0c\u4e5f\u662f\u4e0d\u80fd\u4f5c\u4e3a\u53d8\u91cf\u540d\u7684\u3002<\/p>\n
http:\/\/www.ruanyifeng.com\/blog\/2013\/01\/javascript_strict_mode.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u8bbe\u7acb”\u4e25\u683c\u6a21\u5f0f”\u7684\u76ee\u7684\uff0c\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u4e2a\uff1a \u3000\u3000- \u6d88\u9664Javascript\u8bed\u6cd5\u7684\u4e00\u4e9b\u4e0d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-4875","post","type-post","status-publish","format-standard","hentry","category-11"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/4875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4875"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/4875\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}