绗竴娆＄湅鍒拌繖涓棶棰樼殑鏃跺€欙紝杩樻尯闇囨儕鐨勩€傜粡杩囧垎鏋愭垜浠紪绋嬬殑甯歌瘑锛屾垜瑙夊緱鍙橀噺a涓€瀹氳鍚屾椂绛変簬1銆?銆?杩欎笁涓€肩殑鍙兘鎬т笉澶с€傝繖鏄竴涓ぉ鏂瑰璋紝涓嶄簹浜庡摜寰峰反璧?+1=1鐚滄兂锛屼絾涓€鍒囩殕鏈夊彲鑳斤紝鍑轰簬濂藉锛屾兂浜嗗崐澶╋紝鍐冲畾璇曚竴璇曡В娉曘€傛垜鐨勬兂娉曟潵婧愪簬涔嬪墠閬囧埌鐨勫彟涓€涓被浼肩殑闈㈣瘯棰橈細//Setafunctiontooutputthevaluef(1)=1;f(1)(2)=3;f(1)(2)(3)=6锛涘綋鏃剁殑瑙ｅ喅鏂规鏄娇鐢╰oString鎴栬€卾alueOf鏉ュ疄鐜扮殑锛岄偅涔堟垜浠厛鍥為【涓€涓媡oString鍜寁alueOf鏂规硶锛岃繖鏍锋墠鑳芥繁鍏ョ悊瑙ｈ繖绫婚棶棰橈細姣斿鎴戜滑鏈変竴涓璞★紝杩欎釜瀵硅薄涓嶉噸瑕佺殑鎯呭喌鍐檛oString()鏂规硶鍜寁alueOf()鏂规硶锛屽湪Node鎴栨祻瑙堝櫒涓殑杈撳嚭缁撴灉鏄繖鏍风殑classPerson{constructor(){this.name=name;}}constbest=newPerson("Kobe");console.log(best);//鏃ュ織锛歅erson{name:"Kobe"}console.log(best.toString());//鏃ュ織锛歔objectObject]console.log(best.valueOf());//鏃ュ織锛歅erson{name:"Kobe"}console.log(best+"GiGi");//log:[objectObject]GiGibestPersonbest.toString()[objectObject]best.valueOf()Personbest+'GiGi'[objectObject]GiGi浠庝笂闈㈢殑杈撳嚭鎴戜滑鍙互瑙傚療鍒颁竴涓粏鑺傦紝toString()杈撳嚭[objectObject]锛岃€寁alueOf()杈撳嚭鐨勬槸Person瀵硅薄鏈韩锛屽綋璁＄畻鍒癰est+'GiGi'缁撴灉杈撳嚭鐨勬槸[objectObject]GiGi銆傛垜浠彲浠ュ垵姝ユ帹鏂槸瀵硅薄璋冪敤toString()鏂规硶寰楀埌鐨勫瓧绗︿覆杩涜璁＄畻銆傛槸杩愮畻绗?鐨勯瓟鍔涘悧锛熶负浜嗛獙璇佹垜浠笂涓€姝ョ殑鎺ㄦ柇锛屾垜浠◢寰敼鍔ㄤ竴涓嬶紝閲嶅啓涓€娆alueOf鏂规硶锛歝lassPerson{constructor(name){this.name=name;}//瑕嗙洊valueOf鏂规硶valueOf(){returnthis.name;}}bestPersonbest.toString()[objectObject]best.valueOf()Personbest+'GiGi'KobeGiGi杩欐鍜屼笂闈㈠彧鏈変竴涓笉鍚岀殑缁撴灉锛屽氨鏄痓est+'GiGi'鐨勬渶鍚庝袱涓粨鏋滄槸copyvalueOf()鏂规硶鍙樹簡浠庨偅浠ュ悗锛屼粠涓垜浠彲浠ョ湅鍑哄璞＄殑鏈川骞舵病鏈夊彂鐢熸牴鏈€х殑鍙樺寲锛屽彧鏄綋瀹冧綔涓虹洿鎺ユ搷浣滄椂锛屽畠鐨勫€兼槸浠庨噸鍐欑殑valueOf()涓幏鍙栫殑锛屽苟缁х画鍙備笌鍚庣画鐨勮绠楋紝褰撶劧锛屽埆蹇樹簡鎴戜滑杩樻湁涓€涓猼oString()鏂规硶锛屾墍浠ユ垜浠篃閲嶅啓瀹冪湅鐪嬬粨鏋滄槸鍚︿細鍙楀埌褰卞搷锛歝lassPerson{constructor(name){this.name=name;}valueOf(){杩斿洖this.name;}toString(){杩斿洖`鍐嶈${this.name}`;}}bestPersonbest.toString()ByeKobebest.valueOf()Kobebest+'GiGi'KobeGigi鎴戜滑鎵惧埌浜哹est+'GiGi'orNothinghaschanged锛屾垜浠粛鐒朵娇鐢ㄦ垜浠笂娆￠噸鍐檝alueOf()鐨勭粨鏋溿€傚叾瀹炴垜浠噸鍐欎簡valueOf鏂规硶锛屼笉闇€瑕佽皟鐢╲alueOf()鐨勮繑鍥炲€艰繘琛岃绠椼€傜浉鍙嶏紝褰搗alueOf杩斿洖鐨勫€兼槸鍩烘湰鏁版嵁绫诲瀷鏃讹紝浼氭牴鎹繖涓€艰繘琛岃绠椼€傚鏋滀笉鏄熀鏈暟鎹被鍨嬶紝鍒欎娇鐢╰oString()鏂规硶杩斿洖鐨勫€艰繘琛岃绠椼€傜被Person{鏋勯€犲嚱鏁帮紙鍚嶇О锛墈this.name=name;}valueOf(){杩斿洖杩欎釜鍚嶇О锛泒toString(){杩斿洖`鍐嶈${this.name}`;}}constbest=newPerson({name:"Kobe"});鎺у埗鍙版棩蹇楋紙鏈€浣筹級锛?/鏃ュ織锛氫汉鍚嶏細{name:"Kobe"}console.log(best.toString());//鏃ュ織锛氬啀瑙乕objectObject]console銆傛棩蹇楋紙best.valueOf锛堬級锛夛紱//鏃ュ織锛歅erson{name:"Kobe"}console.log(best+"GiGi");//log:[objectObject]GiGibestPersonbest.toString()Bye[objectObject]best.valueOf(){name:"Kobe"}best+'GiGi'Bye[objectObject]GiGi鐪嬩笂闈㈢殑渚嬪瓙锛岀幇鍦ㄤ紶鍏ョ殑name鏄竴涓猳bjectnewPerson({name:"Kobe"})锛屽苟涓斾笉鏄熀鏈暟鎹被鍨嬶紝鎵€浠ュ湪杩涜鍔犳硶杩愮畻鏃讹紝浼氫娇鐢╰oString()鏂规硶杩斿洖鐨勫€艰繘琛岃绠椼€傚綋鐒讹紝濡傛灉娌℃湁valueOf()鏂规硶锛屽氨浼氭墽琛宼oString()鏂规硶銆傞偅涔堥摵鍨簡杩欎箞涔咃紝鎴戜滑灏辫鎻檽绛旀浜嗐€傛垜浠鍦ㄤ娇鐢ㄤ笂杩板師鍒欐潵鍥炵瓟杩欎釜闂锛歝lassA{constructor(value){this.value=value;}toString(){杩斿洖this.value++;}}consta=newA(1);if(a==1&&a==2&&a==3){console.log("HiEno!");}杩欓噷姣旇緝绠€鍗曪紝鐩存帴閲嶅啓toString()鏂规硶锛岀敱浜庢病鏈塿alueOf()锛屽綋鍒ゆ柇a==1鏃讹紝灏变細鎵цtoString()鐨勭粨鏋溿€侫绫粄鏋勯€犲嚱鏁帮紙鍊硷級{杩欎釜銆備环鍊?浠峰€硷紱}valueOf(){杩斿洖杩欎釜銆備环鍊?+锛泒}consta=newA(1);if(a==1&&a==2&&a==3){console.log("HiEno!");}褰撶劧浣犱篃鍙互鎶妕oString鎹㈡垚valueOf锛屾晥鏋滄槸涓€鏍风殑锛歝lassA{鏋勯€犲嚱鏁帮紙鍊硷級{this.value=value;}valueOf(){杩斿洖this.value++;}}consta=newA(1);console.log(a);if(a==1&&a==2&&a==3){console.log("HiEno!");}鍥犳锛屽綋涓€涓璞″湪鍋氳绠楋紙姣斿鍔犲噺涔橀櫎锛屽垽鏂浉绛夛級鐨勬椂鍊欙紝缁忓父浼氬嚭鐜拌皟鐢╲alueOf()鎴栬€卼oString鐨勯棶棰樸€傝繖涓璞＄殑鍙橀噺鍚庨潰閫氬父闅愯棌鐫€涓€涓嚱鏁般€傚綋鐒讹紝涓嬮潰杩欓亾棰樼殑鍘熺悊鍏跺疄鏄竴鏍风殑锛岄檮涓婅В鍐虫柟娉曪細//璁剧疆涓€涓嚱鏁拌緭鍑哄€糵(1)=1;f(1)(2)=3;f(1)(2)(3)=6;functionf(){璁╁弬鏁?[...鍙傛暟];letadd=function(){args.push(...鍙傛暟);杩斿洖娣诲姞锛泒;add.toString=function(){returnargs.reduce((a,b)=>{returna+b;});};杩斿洖娣诲姞;}console.log(f(1)(2)(3));//6杩樻病缁撴潫锛岃繖閲岃繕浼氭湁涓€浜涚壒娈婄殑瑙ｅ喅鏂规銆傚叾瀹炲湪浣跨敤瀵硅薄鐨勬椂鍊欙紝濡傛灉瀵硅薄鏄竴涓暟缁勶紝閭ｄ箞涓婇潰鐨勯€昏緫渚濈劧浼氭垚绔嬶紝鍙槸姝ゆ椂toString()浼氬彉鎴愬join()鏂规硶鐨勯殣寮忚皟鐢紝鎹㈠彞璇濊锛屽鏋滆瀵硅薄鏄竴涓暟缁勶紝濡傛灉涓嶉噸鍐欏叾浠栫殑toString()鏂规硶锛屽畠鐨勯粯璁ゅ疄鐜版槸璋冪敤鏁扮粍鐨刯oin()鏂规硶鐨勮繑鍥炲€间綔涓簍oString()鐨勮繑鍥炲€硷紝鎵€浠ヨ繖閬撻鏈夋柊鎰忎竴涓В鍐虫柟妗堟槸鍦ㄤ笉閲嶅啓toString()鐨勬儏鍐典笅閲嶅啓join()鏂规硶锛屽苟灏嗗叾鍙樻垚涓€涓猻hift()鏂规硶锛岃鏂规硶鍏佽浠庝腑鍒犻櫎鏁扮粍鐨勭涓€涓厓绱犲苟杩斿洖绗竴涓厓绱犵殑鍊笺€侫绫绘墿灞曟暟缁剓join=this.shift;}consta=newA(1,2,3);if(a==1&&a==2&&a==3){console.log("鍡‥no!");}鎴戜滑鐨勬帰绱箣鏃呰繕娌℃湁缁撴潫銆傜粏蹇冪殑鍚屽浼氬彂鐜帮紝鎴戜滑鐨勯鐩槸濡備綍璁?a===1&&a===2&&a===3)鐨勫€间负鐪燂紝浣嗘槸涓婇潰鐨勮璁哄湪鏉炬暎鐩哥瓑鐨勬儏鍐典笅==锛屼笂闈㈢殑缁撴灉浼氫笉浼氭槸鍦ㄤ弗鏍肩浉绛夌殑鎯呭喌涓嬩笉鍚?==锛熺瓟妗堟槸涓嶅悓鐨勩€傚ぇ瀹跺彲浠ュ皾璇曟妸涓婇潰鐨勬澗鏁ｆ潯浠舵敼鎴愪弗鏍艰皟璇曪紝鍐嶈瘯涓€涓嬪氨鐭ラ亾缁撴灉浜嗐€俢lassAextendsArray{join=this.shift;}consta=newA(1,2,3);//鎶?=鏀规垚===鍚庯細if(a===1&&a===2&&a===3){console.log("鍡‥no!");//鍡紝浼婅锛佹鏃跺啀涔熸病鏈夊嚭鐜拌繃}閭ｄ箞姝ゆ椂濡備綍瑙ｅ喅鍛紵鎴戜滑鍙互鑰冭檻浣跨敤Object.defineProperty鏉ヨВ鍐炽€傝繖绉嶆柟娉曞洜涓篤ue鑰屽箍涓轰汉鐭ワ紝涔熸槸闈㈣瘯涓殑鑰佺敓甯歌皥鐨勭煡璇嗙偣銆傛垜浠彲浠ョ敤瀹冩潵鍔寔a鍙橀噺銆傚綋鎴戜滑寰楀埌瀹冪殑鍊硷紝璁╁畠鑷锛岄偅涔堥棶棰樺氨鍙互瑙ｅ喅浜嗭細varvalue=1;Object.defineProperty(window,"a",{get(){returnthis.value++;}});if(a===1&&a===2&&a===3){console.log("HiEno!");}涓婇潰鎴戜滑鍦ㄥ叏灞€绐楀彛涓婇潰鍔寔浜哸锛屾瘡娆鍋氬垽鏂殑鏃跺€欙紝浼氳Е鍙慻et灞炴€ц幏鍙栧€硷紝姣忔鑾峰彇鍊奸兘浼氳Е鍙戝嚱鏁拌繘琛屼竴娆¤嚜澧烇紝鍒ゆ柇3娆″悗鑷3娆★紝鎵€浠ュ叕寮忔渶缁堟垚绔嬨€傚綋鐒惰繖閲岃繕鏈夊叾浠栫殑鏂规硶锛岃繖閲屽啀涓句竴涓緥瀛愶紝姣斿鐢ㄩ殣钘忓瓧绗︽潵娆洪獥闈㈣瘯瀹橈細vara锞?1;vara=2;var锞燼=3;if(a锞?=1&&a==2&&锞燼==3){console.log("HiEno!");}涓婇潰鐨勮В鍐虫柟妗堥潪甯告贩涔便€備笉灏忓績浼氫互涓烘槸涓変釜鐩稿悓鐨刟锛屽叾瀹炴槸瀹氫箟浜嗕笁涓笉鍚岀殑a鍊笺€俛鍓嶅悗鏈夐殣钘忓瓧绗︼紝鎵€浠ヨ皟璇曟椂璇峰鍒剁矘璐翠笂闈㈢殑浠ｇ爜杩涜璋冭瘯銆傚鏋滄墜鍔ㄨ緭鍏hrome锛屽彲浠ョ敤鐗规畩鎵嬫鍦ㄤ竴涓猂ealized鍚庨潰鎵撲笂涓€涓や釜绾㈢偣锛岃繘鍏ヨ溅鍐呰皟璇曞伐鍏蜂細鎶婅繖浜涚棔杩归殣钘忚捣鏉ワ紝鍋氬埌鐬掑ぉ杩囨捣锛屾樉绀虹粰杞︿富銆傞潰璇曞畼涓€鏃舵病鍙嶅簲杩囨潵銆傛渶鍚庣澶у鏂扮殑涓€骞村伐浣滈『鍒┿€備笂闈㈢殑浠ｇ爜鍦ㄥ疄闄呮儏鍐典笅鍩烘湰涓嶄細鐢ㄥ埌锛屼絾鏄鎺㈢储JS鐨勬棤闄愬彲鑳藉緢鏈夊惎鍙戙€備篃寤鸿闈㈣瘯瀹樹笉瑕佺敤杩欑闈㈣瘯棰樻潵鍒侀毦闈㈣瘯瀹榽濡傛灉鏂囩珷鍜岀瑪璁拌兘缁欎綘甯︽潵涓€鐐瑰府鍔╂垨鑰呭惎鍙戯紝璇蜂笉瑕佸悵鍟綘鐨勭偣璧炲拰鏀惰棌锛屼綘鐨勪竴瀹氭槸鎴戝墠杩涚殑鏈€澶у姩鍔涴煒侀檮涓婄瑪璁伴摼鎺ワ紝闃呰寰€鏈熸洿鏂板緢澶氫紭璐ㄦ枃绔犲彲浠ュ湪绉诲姩涓煡鐪嬨€傚鏋滃枩娆紝鍙互缁欐垜鐐逛釜璧炲拰榧撳姳锛歨ttps://github.com/Wscats/CV/...
