鍓嶈█锛歊egex鍦ㄥ父瑙勫紑鍙戜腑鍙兘涓嶉渶瑕佸畬鍏ㄦ帉鎻★紝浣嗘槸闅忕潃瀵规妧鏈殑娣卞叆鎸栨帢鎴栬€呭鏌愪釜妗嗘灦婧愮爜鐨勬繁鍏ュ垎鏋愶紝鎴栬€呭鎵句竴浜涙棩甯稿鐞嗗瓧绗︿覆鐨勬瘮杈冨ソ鐨勫鐞嗘柟寮忥紝閭ｄ箞姝ｅ垯琛ㄨ揪寮忓彲浠ヨ鏄繀涓嶅彲灏戠殑浜嗐€備笅闈㈠氨寮€濮嬬敱娴呭叆娣变竴姝ユ瑙ｅ紑姝ｅ垯琛ㄨ揪寮忕殑濂ョ銆傚湪鎴戜滑寮€濮嬩箣鍓嶏紝鎴戜滑闇€瑕佹帉鎻″嚑涓蹇点€傛鍒欒〃杈惧紡鏈夊灏戠琛ㄧ幇鏂瑰紡锛熶粈涔堟槸鍏冨瓧绗︼紵甯哥敤鐨勬湁鍝簺锛熷父鐢ㄧ殑淇グ绗︽湁鍝簺锛熶粈涔堟槸regulargreedymode鍜宯on-greedymode...姝ｅ垯琛ㄨ揪寮忎粙缁嶆垜浠彲浠ラ€氳繃涓€涓緥瀛愭潵鐪嬬湅涓嬮潰涓ょ鏂规硶鏈変綍涓嶅悓銆傪煂般€愭枃鏈槸鍚﹀寘鍚玹est瀛楁銆戯細letstr='thisistest';console.log(str.indexOf('test')!==-1)//trueconsole.log(str.includes('test'))//true缂╁啓//:涓や釜鏂滄潬鐨勬剰鎬濆叾瀹炵被浼兼暟缁刐]鏄畝鍐欏舰寮忋€傛垜浠潵鐪嬪嚑涓畝鍗曡瘝鐨勪緥瀛愶細馃尠瑙勫緥鎬э細//鏂囨湰鏄惁鍖呭惈娴嬭瘯瀛楁letstr='thisistest';letres=/test/console.log(res.test(str))//trueConstructornewRegExp(pattern[,flags]):浠ユ瀯閫犲嚱鏁扮殑褰㈠紡鍒涘缓銆傚簲鐢ㄥ満鏅笉澶氾紝浣嗘敮鎸佸姩鎬佷紶鍙傘€傚浜庝竴浜涢渶瑕佸姩鎬侀厤缃鍒欑殑鍦烘櫙杩樻槸寰堟湁甯姪鐨勩€傪煂癛egExp://鏌ユ壘鍖呭惈test鐨勬枃鏈琹etstr='thisistest';functionfoo(r,s){constre=newRegExp(r)returnre.test(s)}letres1=foo('test',娴峰场锛?//trueletres2=foo('test1',str);//鍋囧厓瀛楃鍏冨瓧绗︽槸鍏锋湁鐗瑰畾鍔熻兘鐨勭壒娈婂瓧绗︼紝澶ч儴鍒嗛渶瑕佺敤鍙嶆枩鏉犳爣绀猴紝浠ヤ究涓庢櫘閫氬瓧绗﹁繘琛屾瘮杈冩潵鍖哄垎锛屼篃鏈夊皯閮ㄥ垎鍏冨瓧绗﹂渶瑕佸姞鍙嶆枩鏉狅紝杩欐牱鎵嶈兘浣滀负鏅€氬瓧绗﹁浆涔夈€侰OMMONMETACHARACTERLIST瀛楃鎻忚堪\灏嗕笅涓€涓瓧绗︽爣璁颁负鐗规畩瀛楃锛屾垨鏂囧瓧瀛楃锛屾垨鍙嶅悜寮曠敤锛屾垨鍏繘鍒惰浆涔夈€備緥濡傦紝'n'鍖归厤瀛楃鈥渘鈥濄€?\n'鍖归厤鎹㈣绗︺€傚簭鍒椻€淺鈥濆尮閰嶁€淺鈥濓紝鈥?鈥濆尮閰嶁€?鈥濄€俕鍖归厤杈撳叆瀛楃涓茬殑寮€澶淬€傚鏋滆缃簡RegExp瀵硅薄鐨勫琛屽睘鎬э紝^涔熷尮閰嶁€淺n鈥濇垨鈥淺r鈥濅綅缃€?鍖归厤杈撳叆瀛楃涓茬殑缁撴潫浣嶇疆銆傚鏋滆缃簡RegExp瀵硅薄鐨凪ultiline灞炴€э紝$杩樺尮閰?\n'鎴?\r'涔嬪墠鐨勪綅缃€?鍖归厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忕殑闆舵鎴栧娆°€備緥濡傦紝zo鍖归厤鈥渮鈥濆拰鈥渮oo鈥濄€傜瓑浠蜂簬{0,}銆?鍖归厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忎竴娆℃垨澶氭銆備緥濡傦紝'zo+'鍖归厤鈥渮o鈥濆拰鈥渮oo鈥濓紝浣嗕笉鍖归厤鈥渮鈥?+绛変环浜巤1,}.?鍖归厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忛浂娆℃垨涓€娆°€備緥濡?"do(es)?"鍙互鍖归厤"do"鎴?does".?绛変环浜巤0,1}.{n}n鏄竴涓潪璐熸暣鏁帮紝姝ｅソ鍖归厤n娆★紝姣斿'o{2}'涓嶈兘鍖归厤"Bob"涓殑'o'锛屼絾鏄彲浠ュ尮閰?food"涓殑涓や釜o銆倇n,}n涓洪潪璐熸暣鏁帮紝鑷冲皯鍖归厤n娆★紝渚嬪'o{2,}'涓嶅尮閰?Bob"涓殑'o'锛岃€屾槸鍖归厤"fooooood"涓殑鎵€鏈塷銆?o{1,}'鐩稿綋浜?o+'銆?o{0,}'绛夊悓浜?o*'銆倇n,m}m鍜宯閮芥槸闈炶礋鏁存暟锛屽叾涓璶<=m銆傛渶灏戝尮閰峮娆★紝鏈€澶氬尮閰峬娆°€備緥濡傦紝鈥渙{1,3}鈥濆皢鍖归厤鈥渇ooooood鈥濅腑鐨勫墠涓変釜o銆傗€渙{0,1}鈥濈瓑鍚屼簬鈥渙?鈥濄€傛敞鎰忛€楀彿Therecanbenospacesbetweenandtwonumbers..鍖归厤闄ゆ崲琛岀(\n,\r)涔嬪鐨勪换浣曞崟涓瓧绗︺€傝鍖归厤鍖呮嫭'\n'鍦ㄥ唴鐨勪换浣曞瓧绗︼紝璇风湅鏇村璇翠竴鍗冧釜瀛椾竴涓囦釜濡備綍浣跨敤鍑犱釜绀轰緥鏉ヤ簡瑙ｅ浣曚娇鐢ㄥ厓瀛楃锛焤e.test(str))//true浣跨敤杞箟瀛楃鍖归厤鐗规畩瀛楃濡傦細\-銆乗&銆乗.绛夛紝绗﹀悎鍘熺敓JavaScript鐨勮浆涔夊師鍒欍€備笂鍥撅細馃尠鏍楀瓙锛氬垽鏂瓧绗︿覆鏄惁浠ユ暟瀛楀紑澶翠互瀛楁瘝缁撳熬letstr='abc123'letre=/^[a-z]+[0-9]+$/;re.test(str)//true瑙ｉ噴锛歗浠xx寮€澶达紝&浠xx缁撳熬锛屽湪[a-z]涓〃绀篴-z涓殑浠绘剰涓€涓瓧绗︼紝+涓€娆℃垨澶氭銆備笂鍥撅細馃尠鏍楀瓙锛氭浛鎹㈡棩鏈熺殑鏍煎紡letstr='2019-10-1'letre=/(\d+)\-(\d+)\-(\d+)/;letresult=str.replace(re,`$1Year$February$3rd`);console.log(result)//2019骞?0鏈?鏃ヨВ閲婏細鍒╃敤metacharacter()鍒嗙粍鐨勬蹇佃幏鍙栧尮閰嶇殑缁勫悕锛岀劧鍚庤繘琛屾湰鍦版浛鎹€備笂鍥撅細馃尠鏍楀瓙锛氬尮閰嶅崄鍏繘鍒堕鑹插€糽etstr='#ffbbad#Fc01DF#FFF#ffE'letregex=/#[0-9a-zA-Z]{3,6}/g;console.鏃ュ織锛堟捣宄″尮閰嶏紙姝ｅ垯琛ㄨ揪寮忥級锛夛紱瑙ｉ噴锛氭眰鍗佸叚杩涘埗琛ㄧず娉曪紝鐢▄3,6}鐨勫舰寮忓尮閰嶆渶灏?娆★紝鏈€澶?娆°€備笂鍥撅細浠ヤ笂鏄濡備綍浣跨敤鍏冨瓧绗︾殑绠€鍗曚粙缁嶃€傝鎯虫帉鎻℃洿澶氱殑缁嗚妭锛屽氨闇€瑕佸鐪嬪缁冦€傝阿璋€傝鎴戜滑鏉ョ湅鐪嬪父鐢ㄧ殑淇グ绗︺€傚父鐢ㄧ殑淇グ绗:鍏ㄥ眬妯″紡锛屾剰鎬濇槸鏌ユ壘瀛楃涓茬殑鍏ㄩ儴鍐呭锛岃€屼笉鏄煡鎵句竴涓尮閰嶇殑鍐呭鍜岀粨灏俱€傪煂版牀瀛愶細//鏌ユ壘鍖呭惈test鐨勬枃鏈琹etstr='thisistesttest';娴峰场鍖归厤锛?娴嬭瘯/锛夛紱//鏌ヨ绗竴涓尮閰嶉」str.match(/test/g);//鏌ユ壘鎵€鏈夊尮閰嶉」['test','test']瀛楃涓茬殑鍖归厤鏂规硶璇疯嚜琛屽弬鑰冦€俰锛氫笉鍖哄垎澶у皬鍐欙紝琛ㄧず鏌ヨ鍖归厤鏃跺拷鐣ユā寮忓拰瀛楃涓茬殑澶у皬鍐欍€傪煂版牀瀛愶細//鏌ユ壘鍖呭惈test鐨勬枃鏈琹etstr='thisisTESTTEST';str.match(/test/);//nullstr.match(/test/i);//鏌ヨ鍒扮涓€涓猅EST,str.match(/test/ig);//鍏ㄥ眬鏌ヨ涓嶅尯鍒嗗ぇ灏忓啓鐨勬祴璇曞瓧绗︿覆m:澶氳妯″紡锛岃〃绀哄綋鎵惧埌涓€琛屾枃鏈殑鏈熬鏃讹紝鎼滅储灏嗙户缁€傞渶瑕佹敞鎰忕殑鏄痬鐨勫琛屾ā寮忎細淇敼^鍜?鐨勮涓恒€傞粯璁ゆ儏鍐典笅锛宆鍜?鍖归厤瀛楃涓茬殑寮€澶村拰缁撳熬銆傚姞涓妋淇グ绗﹀悗锛宆鍜?涔熶細鍖归厤琛岄鍜岃灏捐灏撅紝鍗砠鍜?浼氳瘑鍒崲琛岀\n銆侾S锛氶兘灞炰簬鍏冨瓧绗︼紝鍚庨潰鍐嶈銆俕锛氬尮閰嶈緭鍏ュ瓧绗︿覆鐨勫紑澶淬€?锛氬尮閰嶈緭鍏ュ瓧绗︿覆鐨勭粨鏉熶綅缃€傪煂版牀瀛愶細//鏌ユ壘鍖呭惈test鐨勬枃鏈琹etstr='thisistest\n'/test$/.test(str)//false/test$/m.test(str)//truey:stickymode,which琛ㄧず鍙悳绱粠lastIndex寮€濮嬪強涔嬪悗鐨勫瓧绗︿覆銆傜櫧璇濊В閲婏細y淇グ绗﹀叾瀹炲拰g淇グ绗︾被浼笺€備负浠€涔堢浉浼硷紵鍥犱负g淇グ绗﹀彧闇€瑕佹湁涓€涓墿浣欎綅缃紝鑰寉淇グ绗﹀繀椤讳粠绗竴涓墿浣欎綅缃紑濮嬶紝杩欏氨鏄兌姘寸殑鎰忔€濄€傪煂版牀瀛愶細//鏌ユ壘鍖呭惈a鐨勬枃鏈琹etstr='aaa_aa_a'letr1=/a+/g;letr2=/a+/y;r1.exec(str)//['aaa']r2.exec(str)//['aaa']r1.exec(str)//['aa']r2.exec(str)//null瑙ｉ噴锛氫竴涓娇鐢╣淇グ绗︼紝鍙︿竴涓娇鐢▂淇グ绗︺€傝繖涓や釜姝ｅ垯琛ㄨ揪寮忚鎵ц浜嗕袱娆°€傜涓€娆℃墽琛屾椂锛屼袱鑰呰〃鐜扮浉鍚岋紝鍓╀笅鐨勫瓧绗︿覆閮芥槸_aa_a銆傜敱浜巊淇グ绗︽病鏈変綅缃姹傦紝绗簩娆℃墽琛屼細杩斿洖缁撴灉锛岃€寉淇グ绗﹁姹傚繀椤讳粠澶撮儴寮€濮嬪尮閰嶏紝鎵€浠ヨ繑鍥瀗ull銆傛洿澶氳缁嗕俊鎭痬:Unicode妯″紡锛屽惎鐢║nicode鍖归厤銆傜櫧璇濊В閲婏細鍥涗釜瀛楄妭鐨刄TF-16缂栫爜浼氳姝ｇ‘澶勭悊銆傛洿澶氱粏鑺傪煂版牀瀛愶細letstr='馉';/^.$/.test(str)//false/^.$/u.test(str)//trues:dotAll妯″紡锛岃〃绀簃etacharacter.match浠绘剰瀛楃(鍖呮嫭\n鎴朶r)銆傚ぇ鐧借瘽瑙ｉ噴锛氬叾瀹炪€傚厓瀛楃涓蹭腑鍙互琛ㄧず浠讳綍瀛楃锛屼絾涓嶅寘鎷粓姝㈢锛屽\n\r銆俿淇グ绗﹀氨鏄敤鏉ヨВ鍐宠繖涓棶棰樼殑銆傪煂版牀瀛愶細letstr='hello\nworld'/hello.world/.test(str)//false/hello.world/s.test(str)//true姝ｅ垯璐績妯″紡鍜岄潪璐績妯″紡閮藉湪璇磋椽蹇僲ode瀵逛簬闈炶椽濠ā寮忥紝闇€瑕佷簡瑙ｄ粈涔堟槸閲忚瘝锛屽涓嬪浘鎵€绀猴細瀹為檯涓婏紝閲忚瘝鏄竴绉嶅厓瀛楃銆備綘涓嶅繀鍏冲績閭ｄ箞澶氭柊鍚嶈瘝锛屼絾鑷冲皯浣犻渶瑕佺伒娲诲湴浜嗚В瀹冧滑鐨勫姛鑳姐€備妇涓緥瀛愮湅鐪嬩粈涔堟槸璐績妯″紡鍜岄潪璐績妯″紡锛氿煂版牀瀛愶細璐績妯″紡varregex=/\d{2,5}/g;varstring="123123412345123456";console.log(string.match(regex));//["123","1234","12345","12345"]浠ヤ笂锛氶潪璐┆妯″紡varregex=/\d{2,5}?/g;varstring="123123412345123456";鎺у埗鍙版棩蹇楋紙瀛楃涓插尮閰嶏紙姝ｅ垯琛ㄨ揪寮忥級锛夛紱//["12","12","34","12","34","12","34","56"]涓婂浘锛氭敞鎰忓埌浠€涔堜笉鍚屼簡鍚楋紵瀵逛簡锛岃繕鏈変竴涓紵鍙浣犲姞?閲忚瘝鍚庨潰锛岃〃绀哄彧瑕佹弧瓒宠姹傦紝灏变笉鍐嶅啀鍖归厤浜嗐€傞潪璐┆妯″紡涔熺О涓烘儼鎬ч噺璇嶃€傚叿浣撳彲浠ュ弬鑰冭€佸鐨勬鍒欎功锛岄噷闈㈣缁嗚В閲婁簡姝ｅ垯鍖栫殑涓€浜涙蹇靛拰鏂规硶銆傚缓璁嫟璇汇€佸父鍐欍€佸父鍐欍€傛渶鍚庯紝鍏充簬姝ｅ垯鍖栧叾瀹炴湁寰堝姒傚康銆傛垜鍦ㄨ繖閲屾槸涓轰簡甯姪鎮ㄤ负鍦ㄥ鏉傜殑甯歌涓栫晫涓浆寮苟寮€濮嬩娇鐢ㄩ摵骞抽亾璺€備箣鍚庤繕闇€瑕佽嚜宸卞幓鎺㈢储銆傛湁鏃堕棿鐨勮瘽涓嶅Θ鐪嬬湅鎴戞帹鑽愮殑鑰佸鐨勬鍒欒〃杈惧紡涔︺€傚鏋滀綘杩橀渶瑕佸叾浠栦功绫嶆潵宸╁浐鍩虹锛屼綘涔熷彲浠ヤ笅杞芥垜鏁寸悊鐨勪功绫嶇洰褰曞厤璐逛笅杞姐€?/p>
