{"id":114,"date":"2017-01-09T11:06:05","date_gmt":"2017-01-09T03:06:05","guid":{"rendered":"http:\/\/www.qdabc.cn\/?p=114"},"modified":"2017-01-26T19:35:50","modified_gmt":"2017-01-26T11:35:50","slug":"javascript-%e9%97%ad%e5%8c%85%e5%88%b0%e5%ba%95%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"http:\/\/www.qdabc.cn\/?p=114","title":{"rendered":"JavaScript \u95ed\u5305\u5230\u5e95\u662f\u4ec0\u4e48"},"content":{"rendered":"

\u95ed\u5305\u603b\u662f\u8ba9\u4eba\u6478\u4e0d\u7740\u5934\u8111\u3002\u9646\u9646\u7eed\u7eed\u63a5\u89e6\u4e86\u4e00\u4e9b\u95ed\u5305\u7684\u77e5\u8bc6\uff0c\u4f46\u8fd8\u662f\u4e0d\u662f\u975e\u5e38\u660e\u767d\uff0c\u6700\u8fd1\u5076\u7136\u770b\u4e86\u4e00\u4e0b jQuery\u57fa\u7840\u6559\u7a0b \u7684\u9644\u5f55\uff0c\u53d1\u73b0\u9644\u5f55A\u5bf9JavaScript\u7684\u95ed\u5305\u7684\u4ecb\u7ecd\u7b80\u5355\u6613\u61c2\u3002<\/p>\n

1. \u7b80\u5355\u7684\u4f8b\u5b50<\/strong><\/p>\n

\u9996\u5148\u4ece\u4e00\u4e2a\u7ecf\u5178\u9519\u8bef\u8c08\u8d77\uff0c\u9875\u9762\u4e0a\u6709\u82e5\u5e72\u4e2adiv\uff0c \u6211\u4eec\u60f3\u7ed9\u5b83\u4eec\u7ed1\u5b9a\u4e00\u4e2aonclick\u65b9\u6cd5\uff0c\u4e8e\u662f\u6709\u4e86\u4e0b\u9762\u7684\u4ee3\u7801<\/p>\n

<div\u00a0id=\"divTest\">\r\n\u00a0\u00a0\u00a0\u00a0<span>0<\/span>\u00a0<span>1<\/span>\u00a0<span>2<\/span>\u00a0<span>3<\/span>\r\n<\/div>\r\n<div\u00a0id=\"divTest2\">\r\n\u00a0\u00a0\u00a0\u00a0<span>0<\/span>\u00a0<span>1<\/span>\u00a0<span>2<\/span>\u00a0<span>3<\/span>\r\n<\/div>\r\n\r\n\r\n$(document).ready(function()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0var\u00a0spans\u00a0=\u00a0$(\"#divTest\u00a0span\");\r\n\u00a0\u00a0\u00a0\u00a0for\u00a0(var\u00a0i\u00a0=\u00a00;\u00a0i\u00a0<\u00a0spans.length;\u00a0i++)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0spans[i].onclick\u00a0=\u00a0function()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(i);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0}\r\n});<\/pre>\n
\u5f88\u7b80\u5355\u7684\u529f\u80fd\u53ef\u662f\u5374\u504f\u504f\u51fa\u9519\u4e86\uff0c\u6bcf\u6b21alert\u51fa\u7684\u503c\u90fd\u662f4\uff0c\u7b80\u5355\u7684\u4fee\u6539\u5c31\u597d\u4f7f\u4e86<\/p>\n
var\u00a0spans2\u00a0=\u00a0$(\"#divTest2\u00a0span\");\r\n$(document).ready(function()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0for\u00a0(var\u00a0i\u00a0=\u00a00;\u00a0i\u00a0<\u00a0spans2.length;\u00a0i++)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function(num)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0spans2[i].onclick\u00a0=\u00a0function()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(num);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})(i);\r\n\u00a0\u00a0\u00a0\u00a0}\r\n});<\/pre>\n
2.\u5185\u90e8\u51fd\u6570<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u4ece\u4e00\u4e9b\u57fa\u7840\u7684\u77e5\u8bc6\u8c08\u8d77,\u9996\u5148\u4e86\u89e3\u4e00\u4e0b\u5185\u90e8\u51fd\u6570\u3002\u5185\u90e8\u51fd\u6570\u5c31\u662f\u5b9a\u4e49\u5728\u53e6\u4e00\u4e2a\u51fd\u6570\u4e2d\u7684\u51fd\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{}\r\n}<\/pre>\n
innerFn\u5c31\u662f\u4e00\u4e2a\u88ab\u5305\u5728outerFn\u4f5c\u7528\u57df\u4e2d\u7684\u5185\u90e8\u51fd\u6570\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5728outerFn\u5185\u90e8\u8c03\u7528innerFn\u662f\u6709\u6548\u7684\u3002<\/p>\n
function\u00a0outerFn(a)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0a\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0alert(innerFn())\r\n}\r\nouterFn(1)\/\/1<\/pre>\n
\u800c\u5728outerFn\u5916\u90e8\u8c03\u7528innerFn\u5219\u662f\u65e0\u6548\u7684\u3002\u4e0b\u9762\u4ee3\u7801\u4f1a\u5bfc\u81f4\u4e00\u4e2aJavaScript\u9519\u8bef\uff1a<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n}\r\ninnerFn();<\/pre>\n
\u4e0d\u8fc7\u5728outerFn\u5185\u90e8\u8c03\u7528innerFn\uff0c\u5219\u53ef\u4ee5\u6210\u529f\u8fd0\u884c\uff1a<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0innerFn();\r\n}\r\nouterFn();<\/pre>\n
2.1\u4f1f\u5927\u7684\u9003\u8131<\/strong><\/p>\n
JavaScript\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u50cf\u4f20\u9012\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\u4e00\u6837\u4f20\u9012\u51fd\u6570\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cJavaScript\u4e2d\u7684\u5185\u90e8\u51fd\u6570\u80fd\u591f\u9003\u8131\u5b9a\u4e49\u4ed6\u4eec\u7684\u5916\u90e8\u51fd\u6570\u3002<\/p>\n
\u9003\u8131\u7684\u65b9\u5f0f\u6709\u5f88\u591a\u79cd\uff0c\u4f8b\u5982\u53ef\u4ee5\u5c06\u5185\u90e8\u51fd\u6570\u6307\u5b9a\u7ed9\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\uff1a<\/p>\n
var\u00a0globalVar;\r\n\r\nfunction\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0globalVar\u00a0=\u00a0innerFn;\r\n}\r\nouterFn();\r\nglobalVar();<\/pre>\n
\u8c03\u7528outerFn\u65f6\u4f1a\u4fee\u6539\u5168\u5c40\u53d8\u91cfglobalVar\uff0c\u8fd9\u65f6\u5019\u5b83\u7684\u5f15\u7528\u53d8\u4e3ainnerFn\uff0c\u6b64\u540e\u8c03\u7528globalVar\u548c\u8c03\u7528innerFn\u4e00\u6837\u3002\u8fd9\u65f6\u5728outerFn\u5916\u90e8\u76f4\u63a5\u8c03\u7528innerFn\u4ecd\u7136\u4f1a\u5bfc\u81f4\u9519\u8bef\uff0c\u8fd9\u662f\u56e0\u4e3a\u5185\u90e8\u51fd\u6570\u867d\u7136\u901a\u8fc7\u628a\u5f15\u7528\u4fdd\u5b58\u5728\u5168\u5c40\u53d8\u91cf\u4e2d\u5b9e\u73b0\u4e86\u9003\u8131\uff0c\u4f46\u8fd9\u4e2a\u51fd\u6570\u7684\u540d\u5b57\u4f9d\u7136\u53ea\u5b58\u5728\u4e8eouterFn\u7684\u4f5c\u7528\u57df\u4e2d\u3002<\/p>\n
\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5728\u7236\u51fd\u6570\u7684\u8fd4\u56de\u503c\u6765\u83b7\u5f97\u5185\u90e8\u51fd\u6570\u5f15\u7528<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return\u00a0innerFn;\r\n}\r\nvar\u00a0fnRef\u00a0=\u00a0outerFn();\r\nfnRef();<\/pre>\n
\u8fd9\u91cc\u5e76\u6ca1\u6709\u5728outerFn\u5185\u90e8\u4fee\u6539\u5168\u5c40\u53d8\u91cf\uff0c\u800c\u662f\u4eceouterFn\u4e2d\u8fd4\u56de\u4e86\u4e00\u4e2a\u5bf9innerFn\u7684\u5f15\u7528\u3002\u901a\u8fc7\u8c03\u7528outerFn\u80fd\u591f\u83b7\u5f97\u8fd9\u4e2a\u5f15\u7528\uff0c\u800c\u4e14\u8fd9\u4e2a\u5f15\u7528\u53ef\u4ee5\u53ef\u4ee5\u4fdd\u5b58\u5728\u53d8\u91cf\u4e2d\u3002<\/p>\n
\u8fd9\u79cd\u5373\u4f7f\u79bb\u5f00\u51fd\u6570\u4f5c\u7528\u57df\u7684\u60c5\u51b5\u4e0b\u4ecd\u7136\u80fd\u591f\u901a\u8fc7\u5f15\u7528\u8c03\u7528\u5185\u90e8\u51fd\u6570\u7684\u4e8b\u5b9e\uff0c\u610f\u5473\u7740\u53ea\u8981\u5b58\u5728\u8c03\u7528\u5185\u90e8\u51fd\u6570\u7684\u53ef\u80fd\uff0cJavaScript\u5c31\u9700\u8981\u4fdd\u7559\u88ab\u5f15\u7528\u7684\u51fd\u6570\u3002\u800c\u4e14JavaScript\u8fd0\u884c\u65f6\u9700\u8981\u8ddf\u8e2a\u5f15\u7528\u8fd9\u4e2a\u5185\u90e8\u51fd\u6570\u7684\u6240\u6709\u53d8\u91cf\uff0c\u76f4\u5230\u6700\u540e\u4e00\u4e2a\u53d8\u91cf\u5e9f\u5f03\uff0cJavaScript\u7684\u5783\u573e\u6536\u96c6\u5668\u624d\u80fd\u91ca\u653e\u76f8\u5e94\u7684\u5185\u5b58\u7a7a\u95f4\uff08\u7ea2\u8272\u90e8\u5206\u662f\u7406\u89e3\u95ed\u5305\u7684\u5173\u952e\uff09\u3002<\/strong><\/p>\n
\u95ed\u5305\u662f\u6307\u6709\u6743\u9650\u8bbf\u95ee\u53e6\u4e00\u4e2a\u51fd\u6570\u4f5c\u7528\u57df\u7684\u53d8\u91cf\u7684\u51fd\u6570<\/strong>\uff0c\u521b\u5efa\u95ed\u5305\u7684\u5e38\u89c1\u65b9\u5f0f\u5c31\u662f\u5728\u4e00\u4e2a\u51fd\u6570\u5185\u90e8\u521b\u5efa\u53e6\u4e00\u4e2a\u51fd\u6570\uff0c\u5c31\u662f\u6211\u4eec\u4e0a\u9762\u8bf4\u7684\u5185\u90e8\u51fd\u6570\uff0c\u6240\u4ee5\u521a\u624d\u8bf4\u7684\u4e0d\u662f\u5e9f\u8bdd\uff0c\u4e5f\u662f\u95ed\u5305\u76f8\u5173\u7684 ^_^<\/p>\n
1.2\u53d8\u91cf\u7684\u4f5c\u7528\u57df<\/strong><\/p>\n
\u5185\u90e8\u51fd\u6570\u4e5f\u53ef\u4ee5\u6709\u81ea\u5df1\u7684\u53d8\u91cf\uff0c\u8fd9\u4e9b\u53d8\u91cf\u90fd\u88ab\u9650\u5236\u5728\u5185\u90e8\u51fd\u6570\u7684\u4f5c\u7528\u57df\u4e2d\uff1a<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0innerVar\u00a0=\u00a00;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0innerVar++;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function\\t\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"innerVar\u00a0=\u00a0\"\u00a0+\u00a0innerVar\u00a0+\u00a0\"<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return\u00a0innerFn;\r\n}\r\nvar\u00a0fnRef\u00a0=\u00a0outerFn();\r\nfnRef();\r\nfnRef();\r\nvar\u00a0fnRef2\u00a0=\u00a0outerFn();\r\nfnRef2();\r\nfnRef2();<\/pre>\n
\u6bcf\u5f53\u901a\u8fc7\u5f15\u7528\u6216\u5176\u5b83\u65b9\u5f0f\u8c03\u7528\u8fd9\u4e2a\u5185\u90e8\u51fd\u6570\u65f6\uff0c\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684innerVar\u53d8\u91cf\uff0c\u7136\u540e\u52a01\uff0c\u6700\u540e\u663e\u793a<\/p>\n
Outer\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0innerVar\u00a0=\u00a01\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0innerVar\u00a0=\u00a01\r\nOuter\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0innerVar\u00a0=\u00a01\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0innerVar\u00a0=\u00a01<\/pre>\n
\u5185\u90e8\u51fd\u6570\u4e5f\u53ef\u4ee5\u50cf\u5176\u4ed6\u51fd\u6570\u4e00\u6837\u5f15\u7528\u5168\u5c40\u53d8\u91cf\uff1a<\/p>\n
var\u00a0globalVar\u00a0=\u00a00;\r\n\r\nfunction\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0globalVar++;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function\\t\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"globalVar\u00a0=\u00a0\"\u00a0+\u00a0globalVar\u00a0+\u00a0\"<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return\u00a0innerFn;\r\n}\r\nvar\u00a0fnRef\u00a0=\u00a0outerFn();\r\nfnRef();\r\nfnRef();\r\nvar\u00a0fnRef2\u00a0=\u00a0outerFn();\r\nfnRef2();\r\nfnRef2();<\/pre>\n
\u73b0\u5728\u6bcf\u6b21\u8c03\u7528\u5185\u90e8\u51fd\u6570\u90fd\u4f1a\u6301\u7eed\u5730\u9012\u589e\u8fd9\u4e2a\u5168\u5c40\u53d8\u91cf\u7684\u503c\uff1a<\/p>\n
Outer\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0globalVar\u00a0=\u00a01\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0globalVar\u00a0=\u00a02\r\nOuter\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0globalVar\u00a0=\u00a03\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0globalVar\u00a0=\u00a04<\/pre>\n
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\u8fd9\u4e00\u6b21\u7ed3\u679c\u975e\u5e38\u6709\u610f\u601d\uff0c\u4e5f\u8bb8\u6216\u51fa\u4e4e\u6211\u4eec\u7684\u610f\u6599<\/p>\n
Outer\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0outerVar\u00a0=\u00a01\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0outerVar\u00a0=\u00a02\r\nOuter\u00a0function\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0outerVar\u00a0=\u00a01\r\nInner\u00a0function\u00a0\u00a0\u00a0\u00a0outerVar\u00a0=\u00a02<\/pre>\n
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3.\u95ed\u5305\u4e4b\u95f4\u7684\u4ea4\u4e92<\/strong><\/p>\n
\u5f53\u5b58\u5728\u591a\u4e2a\u5185\u90e8\u51fd\u6570\u65f6\uff0c\u5f88\u53ef\u80fd\u51fa\u73b0\u610f\u6599\u4e4b\u5916\u7684\u95ed\u5305\u3002\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u9012\u589e\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u7684\u589e\u91cf\u4e3a2<\/p>\n
function\u00a0outerFn()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0var\u00a0outerVar\u00a0=\u00a00;\r\n\u00a0\u00a0\u00a0\u00a0document.write(\"Outer\u00a0function<br\/>\");\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn1()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0outerVar++;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function\u00a01\\t\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"outerVar\u00a0=\u00a0\"\u00a0+\u00a0outerVar\u00a0+\u00a0\"<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\r\n\u00a0\u00a0\u00a0\u00a0function\u00a0innerFn2()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0outerVar\u00a0+=\u00a02;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"Inner\u00a0function\u00a02\\t\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.write(\"outerVar\u00a0=\u00a0\"\u00a0+\u00a0outerVar\u00a0+\u00a0\"<br\/>\");\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0return\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"fn1\":\u00a0innerFn1,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"fn2\":\u00a0innerFn2\r\n\u00a0\u00a0\u00a0\u00a0};\r\n}\r\nvar\u00a0fnRef\u00a0=\u00a0outerFn();\r\nfnRef.fn1();\r\nfnRef.fn2();\r\nfnRef.fn1();\r\nvar\u00a0fnRef2\u00a0=\u00a0outerFn();\r\nfnRef2.fn1();\r\nfnRef2.fn2();\r\nfnRef2.fn1();<\/pre>\n
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innerFn1\u548cinnerFn2\u5f15\u7528\u4e86\u540c\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u56e0\u6b64\u4ed6\u4eec\u5171\u4eab\u4e00\u4e2a\u5c01\u95ed\u73af\u5883\u3002\u5f53innerFn1\u4e3aouterVar\u9012\u589e\u4e00\u65f6\uff0c\u4e45\u8fddinnerFn2\u8bbe\u7f6e\u4e86outerVar\u7684\u65b0\u7684\u8d77\u70b9\u503c\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002\u6211\u4eec\u4e5f\u770b\u5230\u5bf9outerFn\u7684\u540e\u7eed\u8c03\u7528\u8fd8\u4f1a\u521b\u5efa\u8fd9\u4e9b\u95ed\u5305\u7684\u65b0\u5b9e\u4f8b\uff0c\u540c\u65f6\u4e5f\u4f1a\u521b\u5efa\u65b0\u7684\u5c01\u95ed\u73af\u5883\uff0c\u672c\u8d28\u4e0a\u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u5bf9\u8c61\uff0c\u81ea\u7531\u53d8\u91cf\u5c31\u662f\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5b9e\u4f8b\u53d8\u91cf\uff0c\u800c\u95ed\u5305\u5c31\u662f\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5b9e\u4f8b\u65b9\u6cd5<\/strong>\uff0c\u800c\u4e14\u8fd9\u4e9b\u53d8\u91cf\u4e5f\u662f\u79c1\u6709\u7684\uff0c\u56e0\u4e3a\u4e0d\u80fd\u5728\u5c01\u88c5\u5b83\u4eec\u7684\u4f5c\u7528\u57df\u5916\u90e8\u76f4\u63a5\u5f15\u7528\u8fd9\u4e9b\u53d8\u91cf\uff0c\u4ece\u800c\u786e\u4fdd\u4e86\u4e86\u9762\u5411\u5bf9\u8c61\u6570\u636e\u7684\u4e13\u6709\u6027\u3002<\/p>\n
3.\u89e3\u60d1<\/strong><\/p>\n
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for\u00a0(var\u00a0i\u00a0=\u00a00;\u00a0i\u00a0<\u00a0spans.length;\u00a0i++)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0spans[i].onclick\u00a0=\u00a0function()\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(i);\r\n\u00a0\u00a0\u00a0\u00a0}\r\n}<\/pre>\n
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