{"id":2010,"date":"2022-12-02T12:52:17","date_gmt":"2022-12-02T04:52:17","guid":{"rendered":"https:\/\/qaqaq.top\/?p=2010"},"modified":"2022-12-02T12:52:18","modified_gmt":"2022-12-02T04:52:18","slug":"javascript-regexp-%e5%af%b9%e8%b1%a1-%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=2010","title":{"rendered":"JavaScript RegExp \u5bf9\u8c61 \u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">RegExp \u5bf9\u8c61<\/h2>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u63cf\u8ff0\u5b57\u7b26\u6a21\u5f0f\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>\u6b63\u5219\u8868\u8fbe\u5f0f\u7528\u4e8e\u5bf9\u5b57\u7b26\u4e32\u6a21\u5f0f\u5339\u914d\u53ca\u68c0\u7d22\u66ff\u6362\uff0c\u662f\u5bf9\u5b57\u7b26\u4e32\u6267\u884c\u6a21\u5f0f\u5339\u914d\u7684\u5f3a\u5927\u5de5\u5177\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bed\u6cd5<\/h2>\n\n\n\n<p>var patt=new RegExp(pattern,modifiers);<\/p>\n\n\n\n<p>\u6216\u8005\u66f4\u7b80\u5355\u7684\u65b9\u5f0f:<\/p>\n\n\n\n<p>var patt=\/pattern\/modifiers;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>pattern\uff08\u6a21\u5f0f\uff09 \u63cf\u8ff0\u4e86\u8868\u8fbe\u5f0f\u7684\u6a21\u5f0f<\/li><li>modifiers(\u4fee\u9970\u7b26) \u7528\u4e8e\u6307\u5b9a\u5168\u5c40\u5339\u914d\u3001\u533a\u5206\u5927\u5c0f\u5199\u7684\u5339\u914d\u548c\u591a\u884c\u5339\u914d<\/li><\/ul>\n\n\n\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u5f53\u4f7f\u7528\u6784\u9020\u51fd\u6570\u521b\u9020\u6b63\u5219\u5bf9\u8c61\u65f6\uff0c\u9700\u8981\u5e38\u89c4\u7684\u5b57\u7b26\u8f6c\u4e49\u89c4\u5219\uff08\u5728\u524d\u9762\u52a0\u53cd\u659c\u6760 \\\uff09\u3002\u6bd4\u5982\uff0c\u4ee5\u4e0b\u662f\u7b49\u4ef7\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var re = new RegExp(\"\\\\w+\");\nvar re = \/\\w+\/;<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4fee\u9970\u7b26<\/h2>\n\n\n\n<p>\u4fee\u9970\u7b26\u7528\u4e8e\u6267\u884c\u533a\u5206\u5927\u5c0f\u5199\u548c\u5168\u5c40\u5339\u914d:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u4fee\u9970\u7b26<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>i<\/td><td>\u6267\u884c\u5bf9\u5927\u5c0f\u5199\u4e0d\u654f\u611f\u7684\u5339\u914d\u3002<\/td><\/tr><tr><td>g<\/td><td>\u6267\u884c\u5168\u5c40\u5339\u914d\uff08\u67e5\u627e\u6240\u6709\u5339\u914d\u800c\u975e\u5728\u627e\u5230\u7b2c\u4e00\u4e2a\u5339\u914d\u540e\u505c\u6b62\uff09\u3002<\/td><\/tr><tr><td>m<\/td><td>\u6267\u884c\u591a\u884c\u5339\u914d\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u65b9\u62ec\u53f7<\/h2>\n\n\n\n<p>\u65b9\u62ec\u53f7\u7528\u4e8e\u67e5\u627e\u67d0\u4e2a\u8303\u56f4\u5185\u7684\u5b57\u7b26\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u8868\u8fbe\u5f0f<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>[abc]<\/td><td>\u67e5\u627e\u65b9\u62ec\u53f7\u4e4b\u95f4\u7684\u4efb\u4f55\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[^abc]<\/td><td>\u67e5\u627e\u4efb\u4f55\u4e0d\u5728\u65b9\u62ec\u53f7\u4e4b\u95f4\u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[0-9]<\/td><td>\u67e5\u627e\u4efb\u4f55\u4ece 0 \u81f3 9 \u7684\u6570\u5b57\u3002<\/td><\/tr><tr><td>[a-z]<\/td><td>\u67e5\u627e\u4efb\u4f55\u4ece\u5c0f\u5199 a \u5230\u5c0f\u5199 z \u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[A-Z]<\/td><td>\u67e5\u627e\u4efb\u4f55\u4ece\u5927\u5199 A \u5230\u5927\u5199 Z \u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[A-z]<\/td><td>\u67e5\u627e\u4efb\u4f55\u4ece\u5927\u5199 A \u5230\u5c0f\u5199 z \u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[adgk]<\/td><td>\u67e5\u627e\u7ed9\u5b9a\u96c6\u5408\u5185\u7684\u4efb\u4f55\u5b57\u7b26\u3002<\/td><\/tr><tr><td>[^adgk]<\/td><td>\u67e5\u627e\u7ed9\u5b9a\u96c6\u5408\u5916\u7684\u4efb\u4f55\u5b57\u7b26\u3002<\/td><\/tr><tr><td>(red|blue|green)<\/td><td>\u67e5\u627e\u4efb\u4f55\u6307\u5b9a\u7684\u9009\u9879\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u5143\u5b57\u7b26<\/h2>\n\n\n\n<p>\u5143\u5b57\u7b26\uff08Metacharacter\uff09\u662f\u62e5\u6709\u7279\u6b8a\u542b\u4e49\u7684\u5b57\u7b26\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u5143\u5b57\u7b26<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>.<\/td><td>\u67e5\u627e\u5355\u4e2a\u5b57\u7b26\uff0c\u9664\u4e86\u6362\u884c\u548c\u884c\u7ed3\u675f\u7b26\u3002<\/td><\/tr><tr><td>\\w<\/td><td>\u67e5\u627e\u6570\u5b57\u3001\u5b57\u6bcd\u53ca\u4e0b\u5212\u7ebf\u3002<\/td><\/tr><tr><td>\\W<\/td><td>\u67e5\u627e\u975e\u5355\u8bcd\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\d<\/td><td>\u67e5\u627e\u6570\u5b57\u3002<\/td><\/tr><tr><td>\\D<\/td><td>\u67e5\u627e\u975e\u6570\u5b57\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\s<\/td><td>\u67e5\u627e\u7a7a\u767d\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\S<\/td><td>\u67e5\u627e\u975e\u7a7a\u767d\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\b<\/td><td>\u5339\u914d\u5355\u8bcd\u8fb9\u754c\u3002<\/td><\/tr><tr><td>\\B<\/td><td>\u5339\u914d\u975e\u5355\u8bcd\u8fb9\u754c\u3002<\/td><\/tr><tr><td>\\0<\/td><td>\u67e5\u627e NULL \u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\n<\/td><td>\u67e5\u627e\u6362\u884c\u7b26\u3002<\/td><\/tr><tr><td>\\f<\/td><td>\u67e5\u627e\u6362\u9875\u7b26\u3002<\/td><\/tr><tr><td>\\r<\/td><td>\u67e5\u627e\u56de\u8f66\u7b26\u3002<\/td><\/tr><tr><td>\\t<\/td><td>\u67e5\u627e\u5236\u8868\u7b26\u3002<\/td><\/tr><tr><td>\\v<\/td><td>\u67e5\u627e\u5782\u76f4\u5236\u8868\u7b26\u3002<\/td><\/tr><tr><td>\\xxx<\/td><td>\u67e5\u627e\u4ee5\u516b\u8fdb\u5236\u6570 xxx \u89c4\u5b9a\u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\xdd<\/td><td>\u67e5\u627e\u4ee5\u5341\u516d\u8fdb\u5236\u6570 dd \u89c4\u5b9a\u7684\u5b57\u7b26\u3002<\/td><\/tr><tr><td>\\uxxxx<\/td><td>\u67e5\u627e\u4ee5\u5341\u516d\u8fdb\u5236\u6570 xxxx \u89c4\u5b9a\u7684 Unicode \u5b57\u7b26\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u91cf\u8bcd<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u91cf\u8bcd<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>n+<\/td><td>\u5339\u914d\u4efb\u4f55\u5305\u542b\u81f3\u5c11\u4e00\u4e2a n \u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\/a+\/ \u5339\u914d &#8220;candy&#8221; \u4e2d\u7684 &#8220;a&#8221;\uff0c&#8221;caaaaaaandy&#8221; \u4e2d\u6240\u6709\u7684 &#8220;a&#8221;\u3002<\/td><\/tr><tr><td>n*<\/td><td>\u5339\u914d\u4efb\u4f55\u5305\u542b\u96f6\u4e2a\u6216\u591a\u4e2a n \u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\/bo*\/ \u5339\u914d &#8220;A ghost booooed&#8221; \u4e2d\u7684 &#8220;boooo&#8221;\uff0c&#8221;A bird warbled&#8221; \u4e2d\u7684 &#8220;b&#8221;\uff0c\u4f46\u662f\u4e0d\u5339\u914d &#8220;A goat grunted&#8221;\u3002<\/td><\/tr><tr><td>n?<\/td><td>\u5339\u914d\u4efb\u4f55\u5305\u542b\u96f6\u4e2a\u6216\u4e00\u4e2a n \u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\/e?le?\/ \u5339\u914d &#8220;angel&#8221; \u4e2d\u7684 &#8220;el&#8221;\uff0c&#8221;angle&#8221; \u4e2d\u7684 &#8220;le&#8221;\u3002<\/td><\/tr><tr><td>n{X}<\/td><td>\u5339\u914d\u5305\u542b X \u4e2a n \u7684\u5e8f\u5217\u7684\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\/a{2}\/ \u4e0d\u5339\u914d &#8220;candy,&#8221; \u4e2d\u7684 &#8220;a&#8221;\uff0c\u4f46\u662f\u5339\u914d &#8220;caandy,&#8221; \u4e2d\u7684\u4e24\u4e2a &#8220;a&#8221;\uff0c\u4e14\u5339\u914d &#8220;caaandy.&#8221; \u4e2d\u7684\u524d\u4e24\u4e2a &#8220;a&#8221;\u3002<\/td><\/tr><tr><td>n{X,}<\/td><td>X \u662f\u4e00\u4e2a\u6b63\u6574\u6570\u3002\u524d\u9762\u7684\u6a21\u5f0f n \u8fde\u7eed\u51fa\u73b0\u81f3\u5c11 X \u6b21\u65f6\u5339\u914d\u3002\u4f8b\u5982\uff0c\/a{2,}\/ \u4e0d\u5339\u914d &#8220;candy&#8221; \u4e2d\u7684 &#8220;a&#8221;\uff0c\u4f46\u662f\u5339\u914d &#8220;caandy&#8221; \u548c &#8220;caaaaaaandy.&#8221; \u4e2d\u6240\u6709\u7684 &#8220;a&#8221;\u3002<\/td><\/tr><tr><td>n{X,Y}<\/td><td>X \u548c Y \u4e3a\u6b63\u6574\u6570\u3002\u524d\u9762\u7684\u6a21\u5f0f n \u8fde\u7eed\u51fa\u73b0\u81f3\u5c11 X \u6b21\uff0c\u81f3\u591a Y \u6b21\u65f6\u5339\u914d\u3002\u4f8b\u5982\uff0c\/a{1,3}\/ \u4e0d\u5339\u914d &#8220;cndy&#8221;\uff0c\u5339\u914d &#8220;candy,&#8221; \u4e2d\u7684 &#8220;a&#8221;\uff0c&#8221;caandy,&#8221; \u4e2d\u7684\u4e24\u4e2a &#8220;a&#8221;\uff0c\u5339\u914d &#8220;caaaaaaandy&#8221; \u4e2d\u7684\u524d\u9762\u4e09\u4e2a &#8220;a&#8221;\u3002\u6ce8\u610f\uff0c\u5f53\u5339\u914d &#8220;caaaaaaandy&#8221; \u65f6\uff0c\u5373\u4f7f\u539f\u59cb\u5b57\u7b26\u4e32\u62e5\u6709\u66f4\u591a\u7684 &#8220;a&#8221;\uff0c\u5339\u914d\u9879\u4e5f\u662f &#8220;aaa&#8221;\u3002<\/td><\/tr><tr><td>n$<\/td><td>\u5339\u914d\u4efb\u4f55\u7ed3\u5c3e\u4e3a n \u7684\u5b57\u7b26\u4e32\u3002<\/td><\/tr><tr><td>^n<\/td><td>\u5339\u914d\u4efb\u4f55\u5f00\u5934\u4e3a n \u7684\u5b57\u7b26\u4e32\u3002<\/td><\/tr><tr><td>?=n<\/td><td>\u5339\u914d\u4efb\u4f55\u5176\u540e\u7d27\u63a5\u6307\u5b9a\u5b57\u7b26\u4e32 n \u7684\u5b57\u7b26\u4e32\u3002<\/td><\/tr><tr><td>?!n<\/td><td>\u5339\u914d\u4efb\u4f55\u5176\u540e\u6ca1\u6709\u7d27\u63a5\u6307\u5b9a\u5b57\u7b26\u4e32 n \u7684\u5b57\u7b26\u4e32\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">RegExp \u5bf9\u8c61\u65b9\u6cd5<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>compile<\/td><td>\u5728 1.5 \u7248\u672c\u4e2d\u5df2\u5e9f\u5f03\u3002&nbsp;\u7f16\u8bd1\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/td><\/tr><tr><td>exec<\/td><td>\u68c0\u7d22\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u7684\u503c\u3002\u8fd4\u56de\u627e\u5230\u7684\u503c\uff0c\u5e76\u786e\u5b9a\u5176\u4f4d\u7f6e\u3002<\/td><\/tr><tr><td>test<\/td><td>\u68c0\u7d22\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u7684\u503c\u3002\u8fd4\u56de true \u6216 false\u3002<\/td><\/tr><tr><td>toString<\/td><td>\u8fd4\u56de\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5b57\u7b26\u4e32\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u652f\u6301\u6b63\u5219\u8868\u8fbe\u5f0f\u7684 String \u5bf9\u8c61\u7684\u65b9\u6cd5<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><th>FF<\/th><th>IE<\/th><\/tr><tr><td>search<\/td><td>\u68c0\u7d22\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5339\u914d\u7684\u503c\u3002<\/td><td>1<\/td><td>4<\/td><\/tr><tr><td>match<\/td><td>\u627e\u5230\u4e00\u4e2a\u6216\u591a\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u3002<\/td><td>1<\/td><td>4<\/td><\/tr><tr><td>replace<\/td><td>\u66ff\u6362\u4e0e\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7684\u5b50\u4e32\u3002<\/td><td>1<\/td><td>4<\/td><\/tr><tr><td>split<\/td><td>\u628a\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\u3002<\/td><td>1<\/td><td>4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">RegExp \u5bf9\u8c61\u5c5e\u6027<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>\u5c5e\u6027<\/th><th>\u63cf\u8ff0<\/th><\/tr><tr><td>constructor<\/td><td>\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u662f\u4e00\u4e2a\u521b\u5efa RegExp \u5bf9\u8c61\u7684\u539f\u578b\u3002<\/td><\/tr><tr><td>global<\/td><td>\u5224\u65ad\u662f\u5426\u8bbe\u7f6e\u4e86 &#8220;g&#8221; \u4fee\u9970\u7b26<\/td><\/tr><tr><td>ignoreCase<\/td><td>\u5224\u65ad\u662f\u5426\u8bbe\u7f6e\u4e86 &#8220;i&#8221; \u4fee\u9970\u7b26<\/td><\/tr><tr><td>lastIndex<\/td><td>\u7528\u4e8e\u89c4\u5b9a\u4e0b\u6b21\u5339\u914d\u7684\u8d77\u59cb\u4f4d\u7f6e<\/td><\/tr><tr><td>multiline<\/td><td>\u5224\u65ad\u662f\u5426\u8bbe\u7f6e\u4e86 &#8220;m&#8221; \u4fee\u9970\u7b26<\/td><\/tr><tr><td>source<\/td><td>\u8fd4\u56de\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u6a21\u5f0f<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>RegExp \u5bf9\u8c61 \u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u63cf\u8ff0\u5b57\u7b26\u6a21\u5f0f\u7684\u5bf9\u8c61\u3002 \u6b63\u5219\u8868\u8fbe\u5f0f\u7528\u4e8e\u5bf9\u5b57\u7b26\u4e32\u6a21\u5f0f\u5339\u914d\u53ca\u68c0\u7d22\u66ff\u6362\uff0c\u662f\u5bf9\u5b57\u7b26\u4e32\u6267\u884c 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