{"id":8834,"date":"2023-08-23T00:45:53","date_gmt":"2023-08-22T16:45:53","guid":{"rendered":"\/?p=8834"},"modified":"2023-08-23T00:45:53","modified_gmt":"2023-08-22T16:45:53","slug":"javascript%e5%af%b9%e8%b1%a1%e5%88%86%e7%b1%bb%e4%b8%8b","status":"publish","type":"post","link":"\/?p=8834","title":{"rendered":"JAVASCRIPT\u5bf9\u8c61\u5206\u7c7b(\u4e0b)"},"content":{"rendered":"<h1>built-in<\/h1>\n<pre><code>unescape\nFunction\neval\nArray\nObject\nDate\nRegExp\nindexOf\nhasOwnProperty\ndecodeURIComponent encodeURI encodeURIComponent\nMath \u3001round \u3001 random\u3001parseInt \u7b49\u5f3a\u5236\u8f6c\u6362\nshift\u3001pop\u3001push\u3001unshift\nslice\u3001splice\u3001split\u3001substring\u3001substr\u3001concat\nString \u3001 fromCharCode\u3001 charCodeAt\natob \u3001btoa\u3001Uint8Array\u3001 ArrayBuffer\u3001 Int32Array\u3001 Int16Array\nsetTimeout \u3001setInterval\u3001 clearTimeout<\/code><\/pre>\n<ol>\n<li>js\u52a0\u5bc6\uff0c\u6570\u7ec4\u504f\u79fb\u7b49\u4e00\u4e9b\u9a9a\u64cd\u4f5c\uff0c\u5c31\u662f\u901a\u8fc7push,unshift\u7b49\u4e00\u4e9b\u5217\u64cd\u4f5c\u5408\u6210\u52a0\u5bc6\uff0c\u5982\u6709\u4e00\u4e2a\u6570\u636e\u8868 [\u2018data\u2019,\u2018data2\u2019]\uff0c\u90a3\u4e48\u6b63\u5e38\u6765\u8bf4[0]\u4ee3\u8868\u503c\u5c31\u662f&quot;data&quot;\uff0c\u90a3\u4e48\u4ece\u670d\u52a1\u7aef\u8fd4\u56de\u6570\u636e\u540e\uff0c\u5982[0,1] \u8fdb\u884c\u6570\u7ec4\u504f\u79fb +500 [500,501] ,\u7136\u540e\uff0c\u4ec5\u4ec5\u51ed\u8fd9\u4e2a\u6570\u7ec4\uff0c\u6839\u672c\u4e0d\u77e5\u9053\u7d22\u5f15\u7684\u6570\u636e\u8868\u503c\u662f\u4ec0\u4e48<\/li>\n<li>\u81ea\u5b9e\u73b0eval\u51fd\u6570\u7b49\u90fd\u4f1a\u7528\u5230\uff0c\u6bd4\u5982\uff0c\u5c06\u4e00\u4e2a\u51fd\u6570\u590d\u5236\u7ed9\u4e00\u4e2a\u53d8\u91cfc\uff0c\u90a3\u4e48 <code>eval(c)<\/code>\u5c31\u8c03\u7528\u4e86\u51fd\u6570<\/li>\n<li>\u4e86\u89e3\u5b9a\u65f6\u5668\uff0c\u53ef\u80fd\u5b58\u5728\uff0c\u5b9a\u65f6\u66f4\u65b0cookie\u7b49\u64cd\u4f5c\uff0c\u5c31\u5f97\u89c2\u5bdf\u5b9a\u65f6\u5668\u51fd\u6570<\/li>\n<li>\u52a0\u5bc6\u8bf7\u6c42\u53c2\u6570\uff0curl\uff0c\u7b49\u64cd\u4f5c\u4e5f\u662f\uff0c\u9700\u8981\u8c03\u8bd5\u770b\u61c2\uff0c\u53ef\u4ee5\u901a\u8fc7\u975e\u6307\u7eb9built-in\u65b9\u6cd5<\/li>\n<\/ol>\n<ul>\n<li>\n<p><code>unescape<\/code>:\u89e3\u7801\u65b9\u6cd5<\/p>\n<p><strong><em>ECMAScript v3 \u5df2\u4ece\u6807\u51c6\u4e2d\u5220\u9664\u4e86 unescape() \u51fd\u6570\uff0c\u5e76\u53cd\u5bf9\u4f7f\u7528\u5b83\uff0c\u56e0\u6b64\u5e94\u8be5\u7528 decodeURI() \u548c decodeURIComponent() \u53d6\u800c\u4ee3\u4e4b<\/em><\/strong><\/p>\n<pre><code>unescape('hello%20\u7a33\u7a33%21')<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Function<\/code>\uff1a\u51fd\u6570\u5b9e\u4f8b\u65b9\u6cd5<\/p>\n<pre><code>var fun = new Function(\"a\", \"return a\") \/\/\u524d\u9762\u662f\u5f62\u53c2\uff0c\u540e\u9762\u662f\u8fd4\u56de\u7684\u5185\u5bb9\n\/\/\u7b49\u4ef7\u4e8e\nfunction fun(a){\n return a\n}<\/code><\/pre>\n<\/li>\n<li>\n<p><code>eval<\/code>:\u628a\u5b57\u7b26\u4e32\u5f53\u505ajs\u4ee3\u7801\u6267\u884c,\u5e76\u4e14\u4f1a\u6267\u884c\u4e00\u4e2a\u865a\u62df\u673a<\/p>\n<pre><code class=\"language-javascript\">eval('alert(\"12312312\")')\n\/\/eval('debuger; alert(\"12312312\")')<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Array<\/code>:\u6570\u7ec4\u5bf9\u8c61<\/p>\n<pre><code>arr = new Array()<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Object<\/code>:\u5bf9\u8c61<\/p>\n<pre><code>person = new Object()<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Date<\/code>:\u5185\u7f6e\u65f6\u95f4\u65b9\u6cd5<\/p>\n<pre><code>Date()\n\"Tue Jul 06 2021 22:33:02 GMT+0800 (\u4e2d\u56fd\u6807\u51c6\u65f6\u95f4)\"\na = new Date() \/\/ \u5b9e\u4f8b\u5316\u4e00\u4e2a\u5bf9\u8c61\nTue Jul 06 2021 22:33:09 GMT+0800 (\u4e2d\u56fd\u6807\u51c6\u65f6\u95f4)\na.getDate() \/\/ \u5b9e\u4f8b\u5316\u5bf9\u8c61\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u5bf9\u8c61\u7684\u5185\u7f6e\u65b9\u6cd5\n6<\/code><\/pre>\n<\/li>\n<li>\n<p><code>RegExp<\/code>\uff1a\u6b63\u5219\u5339\u914d\u7684\u65b9\u6cd5<\/p>\n<p><a href=\"https:\/\/www.runoob.com\/jsref\/jsref-obj-regexp.html\">https:\/\/www.runoob.com\/jsref\/jsref-obj-regexp.html<\/a><\/p>\n<pre><code>\u5e38\u7528\ntest\uff08\uff09\u5224\u65ad\u662f\u5426\u7b26\u5408\u8981\u6c42\uff0c\u8fd4\u56deTrue\u6216\u8005false\nexec\uff08\uff09\u8fd4\u56de\u6570\u7ec4\u5f62\u5f0f \nmatch\uff08\uff09\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u5bf9\u8c61<\/code><\/pre>\n<pre><code>\/\/1\u3001\u5b9a\u4e49\u6b63\u5219\u5bf9\u8c61,qq\u90ae\u7bb1\nvar re = \/^\\d{5,12}@qq\\.com$\/\n\/\/2\u3001test true,false\nconsole.log(re.test(\"1243324@qq.com\"))\nconsole.log(re.test(\"12d43324@qq.com\"))\n\nvar msg = \"hello1,world2\"\nvar re = \/[a-zA-Z]+\/\nconsole.log(re.exec(msg))\n\n\/\/\u5b57\u7b26\u4e32\u4e2d\u4e5f\u6709\u65b9\u6cd5\u652f\u6301\u6b63\u5219\uff0c\u6bd4\u5982match\nvar msg = \"hello1,World2\"\n\/\/ i\u5ffd\u7565\u5927\u5c0f\u5199\uff0cg\u5168\u5c40\nconsole.log(msg.match(\/[a-z]+\/ig))<\/code><\/pre>\n<\/li>\n<li>\n<p><code>indexof<\/code>:\u4f1a\u8fd4\u56de\u7d22\u5f15\u503c<\/p>\n<p>indexOf() \u65b9\u6cd5\u53ef\u8fd4\u56de\u67d0\u4e2a\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e<br \/>\nindexOf() \u65b9\u6cd5\u53ef\u8fd4\u56de\u67d0\u4e2a\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e<br \/>\n\u6570\u7ec4\u4f7f\u7528<\/p>\n<pre><code>arr = ['cookie', 'ck', 'cck']\narr.indexOf('cookie') \/\/\u4f1a\u8fd4\u56decookie\u7684\u7d22\u5f15\u503c 0<\/code><\/pre>\n<p>\u5b57\u7b26\u4f7f\u7528<\/p>\n<pre><code>var str=\"Hello world, welcome to the universe.\";\nvar n=str.indexOf(\"welcome\"); \/\/13<\/code><\/pre>\n<\/li>\n<li>\n<p><code>hasOwnProperty<\/code>:\u68c0\u6d4b\u4e00\u4e2a\u5c5e\u6027\u662f\u5426\u662f\u4e00\u4e2a\u5bf9\u8c61\u7684\u81ea\u6709\u5c5e\u6027<\/p>\n<pre><code>function F(){\n  this.name = \"\u81ea\u6709\u5c5e\u6027\"\n}\nF.prototype.name =  \"\u7ee7\u627f\u5c5e\u6027\"\nvar f = new F()\nf.hasOwnProperty(\"name\") \/\/True<\/code><\/pre>\n<\/li>\n<li>\n<p><code>decodeURIComponent<\/code>\u3001<code>encodeURI<\/code>\u3001<code>encodeURIComponent<\/code>\uff1a\u52a0\u5bc6\u89e3\u5bc6<\/p>\n<pre><code>encode('a 2') \/\/ -> a%202\ndecodeURIComponent('a%202') \/\/ ->'a 2'<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Math<\/code>:<code>Math.random<\/code>\u56db\u820d\u4e94\u5165 <code>Math.round<\/code> \u53d6\u6574\u4fdd\u7559<\/p>\n<pre><code>Math.round(0.5) \/\/ -> 1<\/code><\/pre>\n<\/li>\n<li>\n<p><code>parseInt<\/code>\uff1a\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff0c\u8fd8\u6709\u5f88\u591a<\/p>\n<pre><code>parseInt('1555') \/\/ -> 1555\nparseInt(15.55) \/\/ -> 15\nparseInt('15.55') \/\/ -> 15<\/code><\/pre>\n<\/li>\n<li>\n<p><code>Array<\/code>:\u76f8\u5173\u64cd\u4f5c<\/p>\n<ul>\n<li>unshift:\u5728\u6570\u7ec4\u524d\u9762\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20<\/li>\n<li>shift:\u5220\u9664\u6570\u7ec4\u5185\u6307\u5b9a\u5143\u7d20\uff0c\u82e5\u6709\u591a\u4e2a\u76f8\u540c\u7684\uff0c\u9ed8\u8ba4\u5220\u9664\u7b2c\u4e00\u4e2a<\/li>\n<li>pop:\u5220\u9664\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u8fd9\u4e2a\u5143\u7d20<\/li>\n<li>concat:\u5408\u5e76\u6570\u7ec4\u5e76\u8fd4\u56de\uff0c\u53ef\u4ee5\u4f20\u53c2\u591a\u4e2a\u6570\u7ec4\uff0c\u6ca1\u6709\u53bb\u91cd\u529f\u80fd<\/li>\n<\/ul>\n<pre><code>var arr = new Array()\narr.push(4)\narr.push(3)\narr.push(2)\narr.push(1)\n-->[4,3,2,1]\n\narr2 = arr.concat(arr1, ar3) \/\/\u5408\u5e76\u6570\u7ec4\uff0c\u6ca1\u6709\u53bb\u91cd\u529f\u80fd<\/code><\/pre>\n<\/li>\n<li>\n<p><code>String<\/code>\uff1a\u5b57\u7b26\u4e32\u64cd\u4f5c<\/p>\n<ul>\n<li>\u62c6\u5206\uff1aslice\u3001splice\u3001split \uff08splice\u6539\u53d8\u539f\u6570\u7ec4\uff0cslice:\u4e0d\u6539\u53d8\u539f\u6570\u7ec4\uff09<\/li>\n<li>\u67e5\u627e\uff1asubstring\u3001substr<\/li>\n<li>\u5408\u5e76\uff1aconcat<\/li>\n<\/ul>\n<p>\u62c6\u5206<\/p>\n<pre><code>\/\/ slice() \u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u67d0\u4e2a\u90e8\u5206\u5e76\u5728\u65b0\u5b57\u7b26\u4e32\u4e2d\u8fd4\u56de\u88ab\u63d0\u53d6\u7684\u90e8\u5206\u3002\nvar str = \"Apple, Banana, Mango\";\nvar res = str.slice(7,13); \/\/Banana\n\n\/\/ splice() \u6307\u5b9a\u8d77\u59cb\u4f4d\uff0c\u5220\u9664\u4f4d\u7f6e\uff0c\u63d2\u5165\u6570\u636e\nvar arr = new Array(6)\narr[0] = \"George\"\narr[1] = \"John\"\narr[2] = \"Thomas\"\narr[3] = \"James\"\narr[4] = \"Adrew\"\narr[5] = \"Martin\"\narr.splice(2,3,\"William\")\n\/\/ split() \u65b9\u6cd5\u7528\u4e8e\u628a\u4e00\u4e2a\u5b57\u7b26\u4e32\u5206\u5272\u6210\u5b57\u7b26\u4e32\u6570\u7ec4\nvar str=\"How are you doing today?\"\nconsole.log(str.split(\" \")) \/\/How,are,you,doing,today?\nconsole.log(str.split(\"\")) \/\/ H,o,w, ,a,r,e, ,y,o,u, ,d,o,i,n,g, ,t,o,d,a,y,?\nconsole.log(str.split(\" \",3)) \/\/ How,are,you<\/code><\/pre>\n<p>\u67e5\u627e<\/p>\n<pre><code>\/\/ substring() substring() \u7c7b\u4f3c\u4e8e slice()\u3002\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e substring() \u65e0\u6cd5\u63a5\u53d7\u8d1f\u7684\u7d22\u5f15\u3002\nvar str = \"Apple, Banana, Mango\";\nvar res = str.substring(7,13);\/\/ Banana\n\/\/ substr() \u7c7b\u4f3c\u4e8e slice()\u3002\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\u7b2c\u4e8c\u4e2a\u53c2\u6570\u89c4\u5b9a\u88ab\u63d0\u53d6\u90e8\u5206\u7684\u957f\u5ea6\u3002\nvar str = \"Apple, Banana, Mango\";\nvar res = str.substr(7,6);\/\/Banana<\/code><\/pre>\n<p>\u5408\u5e76<\/p>\n<pre><code>\/\/concat() \u8fde\u63a5\u4e24\u4e2a\u6216\u591a\u4e2a\u5b57\u7b26\u4e32\nvar text1 = \"Hello\";\nvar text2 = \"World\";\ntext3 = text1.concat(\" \",text2);<\/code><\/pre>\n<\/li>\n<li>\n<p><code>fromCharCode<\/code> <code>charCodeAt<\/code>:\u5b57\u7b26\u4e32\u4e0eascii\u7801\u8f6c\u6362<\/p>\n<pre><code>charCodeAt\uff1a\u628a\u5b57\u7b26\u4e32\u8f6c\u4e3aascii\u7801\nfromCharCode:\u628aascii\u7801\u8f6c\u53d8\u4e3a\u5b57\u7b26\u4e32<\/code><\/pre>\n<\/li>\n<li>\n<p><code>atob<\/code> <code>btoa<\/code> <code>Uint8Array<\/code> <code>ArrayBuffer<\/code> <code>Int32Array<\/code> <code>Int16Array<\/code>:\u4e0e\u52a0\u5bc6\u6709\u5173<\/p>\n<pre><code>btoa -> binary to ascii \/\/\u7f16\u7801\u64cd\u4f5c\natob -> ascii to binary \/\/\u89e3\u7801\u64cd\u4f5c<\/code><\/pre>\n<\/li>\n<li>\n<p><code>setTimeout<\/code> \u3001<code>setInterval<\/code>\u3001 <code>clearTimeout<\/code>:\u5b9a\u65f6\u5668<\/p>\n<pre><code>\/\/ setTimeout:\u5ef6\u8fdf\u591a\u5c11\u591a\u5c11\u79d2\u65f6\u95f4\u6267\u884c\u4e00\u6b21\n\/\/ setInterval:\u6309\u7167\u65f6\u95f4\u95f4\u9694\u4e00\u76f4\u6267\u884c\n\/\/ clearTimeout:\u6e05\u9664\u5b9a\u65f6\u5668\nsetTimeout(function(){}, 500)<\/code><\/pre>\n<\/li>\n<\/ul>\n<p>\u4e8c\u3001\u4e09\u5143\u8868\u8fbe\u5f0f\uff1a<\/p>\n<p>js\u52a0\u5bc6\u5f88\u591a\u624b\u6bb5\uff0c\u4f1a\u501f\u52a9\u4e09\u5143\u8868\u8fbe\u5f0f\uff0c\u8fdb\u884c\u64cd\u4f5c\uff0c\u8ba9\u8bfb\u7684\u4eba\u975e\u5e38\u56f0\u96be<\/p>\n<pre><code>\u6761\u4ef6 ? \u4e3a\u6b63\u8fd4\u56de\u7ed3\u679c:\u4e3a\u5047\u8fd4\u56de\u7ed3\u679c\na &gt; b ? c : d \/\/ a \u5927\u4e8e b \u5417\uff1f\u5927\u4e8e\u7684\u8bdd\u8fd4\u56dec\uff0c\u53cd\u4e4b d\n<\/code><\/pre>\n<ul>\n<li>\u57fa\u672c\u7684\u4f7f\u7528<br \/>\n<img src=\"https:\/\/img-blog.csdnimg.cn\/20210706234549915.png#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<li>\u7a0d\u5fae\u52a0\u6df1<br \/>\n<img src=\"https:\/\/img-blog.csdnimg.cn\/20210706235036756.png#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<li>\u4e00\u822c\u6765\u7b97\uff0c\u4e09\u5143\u8868\u8fbe\u5f0f\u4f1a\u591a\u5d4c\u5957\u4f7f\u7528\uff0c\u5c31\u7b97\u4fc4\u7f57\u65af\u5957\u5a03~~<\/li>\n<\/ul>\n<pre><code>\u4e8c\u5c42\u5d4c\u5957 x = a &gt; 10 ? 1 : a &gt; 1 ? 2 : 3\n\u4e09\u5c42\u5d4c\u5957 x = a &gt; 10 ? 1 : a &gt; 1 ? 2 : a &gt; -5 ? 3:4\n\u4e09\u5c42\u5d4c\u5957\u52a0\u8d4b\u503c  a = a &gt; 10 ? 1 : a &gt; 1 ? 2 : a &gt; -5 ? 3:4\n\u4e09\u5c42\u5d4c\u5957\u52a0\u8d4b\u503c\u52a0\u51fd\u6570\u8c03\u7528 \u9519\u8bef\u60c5\u51b51\nfunction a(a){ a *= a};\na = a() &gt; 10 ? 1 : a &gt; 1 ? 2 : a &gt; -5 ? 3:4\n\u4e09\u5c42\u5d4c\u5957\u52a0\u8d4b\u503c\u52a0\u51fd\u6570\u6b63\u5e38\u8c03\u7528 \u9519\u8bef\u60c5\u51b52\nfunction a(a){ a *= a};\na = a(4) &gt; 10 ? 1 : a &gt; 1 ? 2 : a &gt; -5 ? 3:4\n\u4e09\u5c42\u5d4c\u5957\u52a0\u8d4b\u503c\u52a0\u51fd\u6570\u6b63\u5e38\u8c03\u7528 \u6b63\u786e\u60c5\u51b5\nfunction a(a){ return a *= a};\na = a(4) &gt; 10 ? 1 : a &gt; 1 ? 2 : a &gt; -5 ? 3:4\n<\/code><\/pre>\n<h1>\u4e09\u3001\u51fd\u6570\u5185\u7684\u5185\u7f6earguments\u53c2\u6570<\/h1>\n<blockquote>\n<p>\u7b80\u5355\u6765\u8bf4\uff1a<code>arguments \u662f\u4e00\u4e2a\u5bf9\u5e94\u4e8e\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53c2\u6570\u7684\u7c7b\u6570\u7ec4\u5bf9\u8c61<\/code><\/p>\n<p>arguments \u5bf9\u8c61\u662f\u6240\u6709\uff08\u975e\u7bad\u5934\uff09\u51fd\u6570\u4e2d\u90fd\u53ef\u7528\u7684\u5c40\u90e8\u53d8\u91cf\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528arguments<br \/>\n\u5bf9\u8c61\u5728\u51fd\u6570\u4e2d\u5f15\u7528\u51fd\u6570\u7684\u53c2\u6570\u3002\u6b64\u5bf9\u8c61\u5305\u542b\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u6bcf\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5728\u7d22\u5f150\u5904\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u4f20\u9012\u4e86\u4e09\u4e2a\u53c2\u6570\uff0c\u4f60\u53ef\u4ee5\u4ee5\u5982\u4e0b\u65b9\u5f0f\u5f15\u7528\u4ed6\u4eec\uff1a<\/p>\n<p>arguments.callee\uff1a\u6307\u5411\u5f53\u524d\u6267\u884c\u7684\u51fd\u6570\uff08\u5728 \u4e25\u683c\u6a21\u5f0f \u4e0b\uff0c\u7b2c5\u7248 ECMAScript (ES5) \u7981\u6b62\u4f7f\u7528\uff09<br \/>\nargunments.length\uff1a\u6307\u5411\u4f20\u9012\u7ed9\u5f53\u524d\u51fd\u6570\u7684\u53c2\u6570\u6570\u91cf<\/p>\n<p>\u5728<code>\u4e25\u683c\u6a21\u5f0f<\/code>\u4e0b\uff0c\u5269\u4f59\u53c2\u6570\u3001\u9ed8\u8ba4\u53c2\u6570\u548c\u89e3\u6784\u8d4b\u503c\u53c2\u6570\u7684\u5b58\u5728\u4e0d\u4f1a\u6539\u53d8 arguments\u5bf9\u8c61\u7684\u884c\u4e3a\uff0c\u4f46\u662f\u5728\u975e\u4e25\u683c\u6a21\u5f0f\u4e0b\u5c31\u6709\u6240\u4e0d\u540c\u4e86<\/p>\n<\/blockquote>\n<ol>\n<li>\u8fd9\u79cd\u52a0\u5bc6\u60c5\u51b5,\u5c31\u662f\u60f3\u6df7\u6dc6\u8fd4\u56de<br \/>\n<img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707001033189.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/li>\n<li>\u5176\u5b9eES6\u7ed9\u4e86\u65b0\u7684rest\u53c2\u6570\uff0c\u7528\u5728\u51fd\u6570\u6700\u540e\uff0c\u591a\u4f59\u7684\u53c2\u6570\u4ee5\u6570\u7ec4\u7684\u5f62\u5f0f\u4ea4\u7ed9\u53d8\u91cfrest\uff0c\u5982\u679c\u4f20\u5165\u7684\u53c2\u6570\u672a\u586b\u6ee1\u51fd\u6570\u5b9a\u4e49\u7684\u53c2\u6570\uff0crest\u4f1a\u662f\u4e00\u4e2a\u7a7a\u6570\u7ec4\uff0c\u8fd9\u79cd\u4e5f\u80fd\u505a\u624b\u811a<\/li>\n<\/ol>\n<pre><code>function exm(a, b, ...rest) {\n    console.log(&#039;a = &#039; + a);\n    console.log(&#039;b = &#039; + b);\n    console.log(rest);\n}\n\nexm(1, 2, 3, 4, 5);\n\/\/ \u7ed3\u679c:\n\/\/ a = 1\n\/\/ b = 2\n\/\/ Array [ 3, 4, 5 ]\n\nexm(1);\n\/\/ \u7ed3\u679c:\n\/\/ a = 1\n\/\/ b = undefined\n\/\/ Array []\n<\/code><\/pre>\n<h1>\u56db\u3001\u4f4d\u8fd0\u7b97\u7b26\u548c\u903b\u8f91\u8fd0\u7b97\u7b26<\/h1>\n<ul>\n<li><strong>\u4f4d\u8fd0\u7b97\u7b26\u6709 7 \u4e2a\uff0c\u5206\u4e3a\u4e24\u7c7b<\/strong>\uff1a\n<ul>\n<li>\u903b\u8f91\u4f4d\u8fd0\u7b97\u7b26\uff1a\u4f4d\u4e0e\uff08&amp;\uff09\u3001\u4f4d\u6216\uff08|\uff09\u3001\u4f4d\u5f02\u6216\uff08^\uff09\u3001\u975e\u4f4d\uff08~\uff09<\/li>\n<li>\u79fb\u4f4d\u8fd0\u7b97\u7b26\uff1a\u5de6\u79fb\uff08&lt;&lt;\uff09\u3001\u53f3\u79fb\uff08&gt;&gt;\uff09\u3001\u65e0\u7b26\u53f7\u53f3\u79fb\uff08&gt;&gt;&gt;\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>1\u3001\u4f4d\u8fd0\u7b97\u7b26<\/h2>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707001855563.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><br \/>\n<img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707001954174.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>2\u3001\u903b\u8f91\u8fd0\u7b97\u7b26<\/h2>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707002218839.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>3\u3001jsfuck<\/h2>\n<p><a href=\"https:\/\/www.jianshu.com\/p\/e7246218f424\">https:\/\/www.jianshu.com\/p\/e7246218f424<\/a><\/p>\n<pre><code>false       =&gt;  ![]\ntrue        =&gt;  !![]\nundefined   =&gt;  [][[]]\nNaN         =&gt;  +[![]]\n0           =&gt;  +[]\n1           =&gt;  +!+[]\n2           =&gt;  !+[]+!+[]\n10          =&gt;  [+!+[]]+[+[]]\nArray       =&gt;  []\nNumber      =&gt;  +[]\nString      =&gt;  []+[]\nBoolean     =&gt;  ![]\nFunction    =&gt;  [][&quot;filter&quot;]\neval        =&gt;  [][&quot;filter&quot;][&quot;constructor&quot;]( CODE )()\nwindow      =&gt;  [][&quot;filter&quot;][&quot;constructor&quot;](&quot;return this&quot;)()\n<\/code><\/pre>\n<p>\u90a3\u4e48\u6709\u4e9b\u6df7\u6dc6\u52a0\u5bc6<\/p>\n<pre><code>+!+[]\n1\na = &#039;abcd&#039;\n&quot;abcd&quot;\neval(a[+[]] + &#039;lert(111)&#039;)\n<\/code><\/pre>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707003504881.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h1>\u4e94\u3001js\u6df7\u6dc6\uff0c\u4f2a\u4ee3\u7801\uff0c\u64cd\u4f5c\u90fd\u6709\u54ea\u4e9b<\/h1>\n<p>\u90a3\u4e48\u901a\u8fc7\u6587\u7ae0\uff0c\u4e00\u3001\u4e8c\u3001\u4e09\u3001\u56db\u5c0f\u8282\u53ef\u4ee5\u5f15\u51fa\u4ee5\u4e0b\uff08\u4e0d\u5b8c\u5168\uff09\u7684\u6df7\u6dc6\u52a0\u5bc6\u65b9\u6cd5\uff0c\u9a9a\u64cd\u4f5c<\/p>\n<ol>\n<li>\u81ea\u6267\u884c\u51fd\u6570\u5d4c\u5957\u6267\u884c function(a, b){}(fn1,fn2)<\/li>\n<li>\u53d8\u91cf\u540d\u6df7\u6dc6\uff1a_0x319289 _$SW Oo0o00o0 a b c<\/li>\n<li>\u51fd\u6570\u540d\u4e0e\u4e0d\u4e00\u81f4\u539f\u56e0\uff081.\u6784\u9020\u51fd\u6570\u30012. \u91cd\u65b0\u8d4b\u503c\uff09<\/li>\n<li>\u4e09\u5143\u8868\u8fbe\u5f0f\u5d4c\u5957<\/li>\n<li>\u63a7\u5236\u6d41\u5e73\u5766\u5316<\/li>\n<li>\u6253\u5305<\/li>\n<li>\u9b54\u6539\u52a0\u5bc6\u5305<\/li>\n<li>\u91cd\u6784\u89e3\u91ca\u5668<\/li>\n<li>\u5269\u4e0b\u540e\u9762\u6587\u7ae0<\/li>\n<\/ol>\n<h2>1. \u81ea\u6267\u884c\u51fd\u6570\u5d4c\u5957\u6267\u884c function(a, b){}(fn1,fn2)<\/h2>\n<p>\u5229\u7528fn1,fn2\u4e24\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5f53\u505aa\uff0cb\u4f20\u5165\u8fdb\u53bb<\/p>\n<h2>2\u3001\u53d8\u91cf\u540d\u6df7\u6dc6<\/h2>\n<p>\u4e00\u822c\u90fd\u4e0d\u7528\u7ba1\uff0c\u76f4\u63a5\u5206\u6790\u4e5f\u53ef\u4ee5<br \/>\n\u53ef\u4ee5\u901a\u8fc7AST\uff0c\u9012\u5f52\u5c31\u80fd\u89e3\u51b3<\/p>\n<h2>3\u3001\u51fd\u6570\u540d\u4e0d\u4e00\u81f4\uff081.\u6784\u9020\u51fd\u6570 2.\u91cd\u65b0\u590d\u5236\uff09<\/h2>\n<p><img src=\"https:\/\/img-blog.csdnimg.cn\/20210707010004868.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDIzODY4Mw==,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><br \/>\n\u90a3\u4e48\u5982\u4f55\u786e\u5b9a\u5462\uff0c\u5c31\u901a\u8fc7 <code>new c(<\/code> \u8fd9\u6837\u7684\u65b9\u5f0f\u53bb\u627e\u51fd\u6570\u5165\u53e3\uff0c\u4e0d\u4e00\u5b9a\u627e\u7684\u5230<\/p>\n<h2>4\u3001\u4e09\u5143\u8868\u8fbe\u5f0f<\/h2>\n<p>\u524d\u9762\u63d0\u5230\u4e86<\/p>\n<h2>5\u3001\u6d41\u7a0b\u5e73<\/h2>\n<h2>6\u3001\u6253\u5305<\/h2>\n<p>\u73b0\u5728\u5f88\u591aJavaScript\u4ee3\u7801\u7684\u53d1\u5c55\uff0c\u5f88\u591a\u90fd\u4e0d\u662f\u81ea\u5df1\u5199\u7684\uff0c\u90fd\u662f\u7528\u539f\u751f\u7684\uff0c\u5c31\u662f\u5355\u7eaf\u7684\u6253\u5305\uff0c\u63d0\u9ad8\u8fd0\u884c\u901f\u5ea6\uff0c\u81ea\u5e26\u4e86\u4e00\u4e9b\u6df7\u6dc6\uff0c<br \/>\n\u5bfc\u81f4\u5206\u6790\u589e\u52a0\u96be\u5ea6<\/p>\n<h2>7\u3001\u63a7\u5236\u6d41\u5e73\u5766\u5316<\/h2>\n<p>\u5c06\u7b80\u5355\u7684\u6d41\u7a0b\u590d\u6742\u5316\uff0c\u8df3\u6765\u8df3\u53bb<\/p>\n<p><strong>\u7b80\u5355\u7684\u63a7\u5236\u6d41\uff1a<\/strong><\/p>\n<ul>\n<li>\u5e38\u89c1if<\/li>\n<li>switch<\/li>\n<\/ul>\n<p>\u7a0b\u5e8f\u81ea\u9876\u5411\u4e0b\u8fd0\u884c,\u6267\u884c\u7684\u987a\u5e8f\u5f88\u5e73\u5766\uff0c\u4e0d\u4f1a\u6765\u56de\u8df3\u8dc3<\/p>\n<pre><code>function abc(){\n    a = 1;\n    a  = a+1;\n    a = a + 123;\n    console.log(a);\n}\nundefined\nabc() \/\/ 125\n<\/code><\/pre>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707010535110.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><br \/>\n\u5c06\u7b80\u5355\u7684\u4e8b\u60c5\u590d\u6742\u5316<br \/>\n<img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707010632133.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>8\u3001 \u91cd\u6784\u89e3\u91ca\u5668<\/h2>\n<p>\u5bf9js\u7684\u5185\u7f6e\u7684\u65b9\u6cd5\uff0c\u8fdb\u884c\u4e86\u91cd\u6539\uff0c\u56fd\u5185\u7f51\u7ad9\u5f88\u5c11\u89c1\u5230<\/p>\n<h1>\u516d\u3001JS\u53cd\u722c\u539f\u7406<\/h1>\n<h2>1\u3001\u53cd\u722c\u866b\u8bbe\u8ba1\u8981\u6c42<\/h2>\n<p>\uff08\u98ce\u63a7\u722c\u866b\uff0c\u65e2\u4e00\u4e2a\u7528\u6237\u4e0d\u53ef\u80fd\u5728\u4e00\u4e2a\u5c0f\u65f6\u5185\uff0c\u8bbf\u95ee\u4e0a\u767e\u4e07\u6b21\uff0c\u4e0d\u540c\u7c7b\u578b\u5e97\u94fa\uff09<\/p>\n<p>\u53cd\u722c\u866b\u7684\u4e24\u5927\u57fa\u672c\u8981\u6c42\u548c\u95ee\u9898\uff1a<\/p>\n<ol>\n<li>\u8ba9\u6d4f\u89c8\u5668\u6b63\u5e38\u8bbf\u95ee<\/li>\n<li>\u8ba9\u722c\u866b\u811a\u672c\u65e0\u6cd5\u8bbf\u95ee<\/li>\n<li>\u4e0d\u5f71\u54cd\u7528\u6237\u4f53\u9a8c<\/li>\n<li>\u80fd\u4e25\u91cd\u963b\u6b62\u722c\u866b\u5de5\u7a0b\u5e08\u7684\u7f16\u7a0b\u96be\u5ea6<\/li>\n<\/ol>\n<p>\u90a3\u4e48\u4ece\u722c\u866b\uff0c\u6267\u884c\u811a\u672c\u7a0b\u5ea6\u8981\u5904\u7406\u5230\u53d1\u9001\u8bf7\u6c42\uff0c\u62ff\u5230\u6570\u636e<\/p>\n<p>\u5bf9\u4e8e\u6d4f\u89c8\u5668\u800c\u8a00\uff0c\u5c31\u9700\u8981\u5c06\u8bf7\u6c42\u54cd\u5e94\u540e\u7684\u6570\u636e\uff0c\u901a\u8fc7css+js\u6e32\u67d3\u6267\u884c\u5230\u6d4f\u89c8\u5668\u663e\u793a\uff0c\u56e0\u6b64\u5728\u8fd9\u4e9b\u90e8\u5206\u5c31\u80fd\u505a\u5f88\u591a\u64cd\u4f5c<br \/>\n<img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/20210707012242726.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>2\u3001JS\u53cd\u722c\u624b\u6bb5\u7684\u7279\u70b9<\/h2>\n<ol>\n<li>cookie\u52a0\u5bc6<br \/>\n\u7ffb\u9875\uff0c\u6216\u8005\u4e00\u5b9a\u6761\u4ef6\uff0c\u51fa\u73b0set-cookie\u64cd\u4f5c\uff0c\u6216\u8005\u5237\u65b0cookie<\/li>\n<li>\u53c2\u6570\u52a0\u5bc6<br \/>\n\u7ffb\u9875\u7684\u65f6\u5019url\u53c2\u6570\u662f\u53d8\u5316\u7684\uff0curl\u52a0\u5bc6\uff0c\u6bcf\u6b21fiddler\u91cd\u653e\u653b\u51fb\u8fd8\u4e0d\u884c\uff0c\u6bd4\u5982url\u62fc\u63a5\u4e86\u4e00\u4e2a\u5947\u602a\u7684\u53c2\u6570<\/li>\n<li>headers\u52a0\u5bc6<br \/>\n\u660e\u663e\u53cd\u722c\u7279\u70b9\uff1asign safe,abcde \u4e71\u7801\u7b49 fnesewq123<\/li>\n<\/ol>\n<h1>\u4e03\u3001\u722c\u866b\u9006\u5411\u65b9\u6cd5\u8bba<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u7ed3\u5408\u524d\u9762\u4e24\u7bc7\u6587\u7ae0<\/p>\n<p>\u722c\u866b\uff08js\u9006\u5411\uff09\u7f51\u7edc\u57fa\u7840\u534f\u8bae\u4e0e\u6293\u5305\u539f\u7406-chrome\u5f00\u53d1\u5de5\u5177-fiddler\u6293\u5305-\u91cd\u653e\u653b\u51fb\uff081\uff09<br \/>\n<a href=\"https:\/\/blog.csdn.net\/weixin_44238683\/article\/details\/118468491\">https:\/\/blog.csdn.net\/weixin_44238683\/article\/details\/118468491<\/a><br \/>\n\u722c\u866b\uff08js\u9006\u5411\uff09js\u57fa\u7840-\u51fd\u6570\u8fdb\u9636-\u539f\u578b\u94fe\uff08prototype\u3001<strong>proto<\/strong>\u3001\u6784\u9020\u51fd\u6570-this\u7ed1\u5b9a\u5bf9\u8c61\uff082\uff09<br \/>\n<a 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