* 瀵硅薄鏄竴縐嶅鍚堟暟鎹被鍨嬶紝瀹冧滑灝嗗涓暟鎹奸泦涓湪涓涓崟鍏冧腑錛岃屼笖榪愯浣跨敤鍚嶅瓧鏉ュ瓨鍙栬繖浜涘箋傝В閲婂璞＄殑鍙︿竴縐嶆柟寮忔槸錛屽璞℃槸涓涓棤搴忕殑灞炴ч泦鍚堬紝姣忎釜灞炴ч兘鏈夎嚜宸辯殑鍚嶅瓧鍜屽箋傚瓨鍌ㄥ湪瀵硅薄涓殑宸插懡鍚嶇殑鍊煎彲浠ユ槸鏁板瓧鍜屽瓧絎︿覆榪欐牱鐨勫師濮嬪鹼紝涔熷彲浠ユ槸瀵硅薄銆?br />*/
var o = new Object();
2.瀵硅薄鐩存帴閲忓垱寤哄璞?
* 瀵硅薄鐩存帴閲忕敱灞炴ц鏄庡垪琛ㄦ瀯鎴愶紝鍒楄〃鍖呭惈鍦ㄥぇ鎷彿涓紝鍏朵腑鐨勫睘鎬ц鏄庣敱閫楀彿闅斿紑銆?br />* 瀵硅薄鐩存帴閲忎腑鐨勬瘡涓睘鎬ц鏄庨兘鐢卞睘鎬у悕鍔犱笂鍐掑彿鍜屽睘鎬у兼瀯鎴愩?br />*/
var zhangsan = {name:”zhangsan”, age:34, married:true};
window.alert(typeof zhangsan); //杈撳嚭object
3.灞炴х殑璇誨彇鍜岃緗?br />* 瀵硅薄鐨勫睘鎬ч氳繃鐐瑰彿榪愮畻絎﹁鍙栧拰璁劇疆銆傚璞＄殑鏂板睘鎬у彲浠ラ氳繃鐩存帴鍒涘緩銆?br />*/
window.alert(zhangsan.car); //杈撳嚭undefined
zhangsan.car=”BMW”; //鐩存帴璧嬪?br />window.alert(zhangsan.car); //杈撳嚭BMW
4.灞炴х殑鏋氫婦
* 閫氳繃for寰幆鏋氫婦姣忎竴涓睘鎬э紝欏哄簭涓嶈兘淇濊瘉鍥哄畾銆?br />* 娉ㄦ剰鏋氫婦鍑虹殑鏄睘鎬у悕縐幫紝騫朵笉鏄睘鎬у箋?br />*/
var values = “”;
for(var v in zhangsan)values += v+”\n”; //鏋氫婦姣忎竴涓睘鎬?br />window.alert(values);
5.灞炴х殑鍒犻櫎浣跨敤delete錛屽delete zhangsan.car
*/
6.鏋勯犲嚱鏁?
* 鏋勯犲嚱鏁版槸鍏鋒湁涓や釜鐗規(guī)х殑javascript鍑芥暟錛?br />* (1)瀹冪敱new 榪愮畻絎﹁皟鐢紱
* (2)浼犻掔粰瀹冪殑鏄竴涓鏂板垱寤虹殑絀哄璞＄殑搴旂敤錛屽皢璇ュ紩鐢ㄤ綔涓哄叧閿瓧this鐨勫鹼紝鑰屼笖瀹冭繕瑕佸鏂板垱寤虹殑瀵硅薄榪涜閫傚綋鐨勫垵濮嬪寲銆?br />* 璁頒綇錛氭瀯閫犲嚱鏁板彧鏄垵濮嬪寲瀵硅薄錛屽茍涓嶈繑鍥炴柊鍒涘緩鐨勫璞°?br />*/
function Rectangle(w, h){
this.width = w;
this.height = h;
}
var ret1 = new Rectangle(2, 1);
//娉ㄦ剰鏋勯犲嚱鏁版槸濡備綍浣跨敤瀹冪殑鍙傛暟鏉ュ垵濮嬪寲this鍏抽敭瀛楁墍寮曠敤鐨勫璞＄殑灞炴?/p>
7.瀵硅薄鐨勬柟娉?
* 鎵璋撴柟娉曪紝灝辨槸閫氳繃瀵硅薄璋冪敤鐨刯avascript鍑芥暟銆傛垜浠煡閬擄紝鍑芥暟灝辨槸鏁板鹼紝瀹冧滑鎵浣跨敤鐨勫悕瀛楁病鏈変換浣曠壒孌婁箣澶勶紝鍙互灝嗗嚱鏁拌祴緇欎換浣曞彉閲忥紝鐢氳嚦璧嬬粰涓涓璞＄殑浠諱綍灞炴э紝閭ｄ箞榪欎釜灞炴у氨鏄璞＄殑鏂規(guī)硶浜嗐?br />* 鍦ㄥ璞＄殑鏂規(guī)硶浣撳唴錛屽叧閿瓧this鐨勫煎氨鎴愪簡璋冪敤璇ユ柟娉曠殑瀵硅薄銆?br />*/
function print(){}
ret1.print = print;
8.鍏充簬this鐨勮璁?br />* 浠諱綍涓涓敤浣滄柟娉曠殑鍑芥暟閮戒細(xì)寰楀埌涓涓澶栫殑瀹為檯鍙傛暟錛屽嵆璋冪敤璇ュ嚱鏁扮殑瀵硅薄銆傜敱浜庢柟娉曢氬父鏄閭ｄ釜瀵硅薄鎵ц鏌愮鎿嶄綔錛屾墍浠ヨ琛ㄨ揪鍑芥暟浣滅敤浜庡璞¤繖涓浜嬪疄錛屾渶濂介噰鐢ㄦ柟娉曠殑璋冪敤璇硶銆?br />* 濡俽ect.setSize(width, height);
* setSize(rect, width, height);
* 铏界劧榪欎袱琛屼唬鐮佸瀵硅薄rect鎵ц鐩稿悓鐨勬搷浣滐紝浣嗘槸絎竴琛屼唬鐮佸湪琛ㄨ揪瀵硅薄rect鏄搷浣滅殑鐒︾偣(鎴栬呰鎿嶄綔鐨勭洰鏍?榪欎竴瑙傜偣鏃舵樉鐒舵竻妤氬緱澶氥?br />*
* 铏界劧鏈夊尯鍒湴瀵瑰緟鍑芥暟鍜屾柟娉曟瘮杈冩湁鐢紝浣嗗疄闄呬笂瀹冧滑涔嬮棿鐨勫樊鍒茍涓嶅ぇ銆傚洖蹇嗕竴涓嬶紝鍑芥暟鏄瓨鍌ㄥ湪鍙橀噺涓殑鍊鹼紝鑰岄偅涓彉閲忎篃涓嶈繃鏄叏灞瀵硅薄鐨勪竴涓睘鎬с傚洜姝わ紝褰撲綘璋冪敤涓涓嚱鏁版椂錛屽疄闄呬笂璋冪敤鐨勬槸鍏ㄥ眬瀵硅薄鐨勪竴涓柟娉曘?br />* 鍦ㄨ繖鏍風(fēng)殑鍑芥暟涓紝鍏抽敭瀛梩his寮曠敤鐨勬槸鍏ㄥ眬瀵硅薄銆傛墍浠ュ嚱鏁板拰鏂規(guī)硶涔嬮棿鍦ㄦ妧鏈笂娌℃湁宸埆錛岀湡姝ｇ殑宸埆鍦ㄤ簬璁捐鍜岀洰鐨勪笂錛屾柟娉曟槸鐢ㄦ潵瀵箃his瀵硅薄榪涜鎿嶄綔鐨勶紝鑰屽嚱鏁伴氬父浼?xì)鏄嫭绔嬬殑锛岒q朵笉闇瑕佷嬌鐢╰his瀵硅薄銆?br />*/
(function f(){
var values = “”;
for(var v in this)values += v + ” “;
window.alert(values);
})(); //榪斿洖window瀵硅薄鐨勬墍鏈夊睘鎬у拰鏂規(guī)硶鍚嶇О
9.鍘熷瀷瀵硅薄鍜岀戶鎵?br />* javascript姣忎釜瀵硅薄閮芥湁鍘熷瀷瀵硅薄錛屾瘡涓璞￠兘緇ф壙鍘熷瀷瀵硅薄鐨勬墍鏈夊睘鎬с?br />* 涓涓璞＄殑鍘熷瀷鏄敱鍒涘緩騫跺垵濮嬪寲璇ュ璞＄殑鏋勯犲嚱鏁板畾涔夌殑銆俲avascript涓殑鎵鏈夊嚱鏁伴兘鏈塸rototype灞炴э紝瀹冨紩鐢ㄤ簡涓涓璞°傝櫧鐒跺師鍨嬪璞″垵濮嬪寲鏃舵槸絀虹殑錛?br />* 浣嗘槸浣犲湪鍏朵腑瀹氫箟鐨勪換浣曞睘鎬ч兘浼?xì)琚鏋勯犲嚱鏁板垱寤虹殑鎵鏈夊璞＄戶鎵褲?br />*
* 鏋勯犲嚱鏁板畾涔変簡瀵硅薄鐨勭被錛屽茍鍒濆鍖栦簡綾諱腑鐘舵佸彉閲忕殑灞炴э紝濡倃idth鍜宧eight銆傚洜涓哄師鍨嬪璞″拰鏋勯犲嚱鏁板叧鑱斿湪涓璧鳳紝鎵浠ョ被鐨勬瘡涓垚鍛橀兘浠庡師鍨嬪璞＄戶鎵夸簡鐩稿悓鐨勫睘鎬с?br />* 榪欒鏄庡師鍨嬪璞℃槸瀛樻斁鏂規(guī)硶鍜屽叾浠栧父閲忓睘鎬х殑鐞嗘兂鍦烘墍銆?br />
* 娉ㄦ剰錛岀戶鎵挎槸鍦ㄦ煡璇竴涓睘鎬у兼椂鑷姩鍙戠敓鐨勩傚睘鎬у茍闈炰粠鍘熷瀷瀵硅薄澶嶅埗鍒版柊鐨勫璞＄殑錛屽畠浠彧涓嶈繃鐪嬭搗鏉ュ儚鏄偅浜涘璞＄殑灞炴с傝繖鍏朵腑鏈変袱鐐歸噸瑕佺殑鍚箟銆?br />* 涓鏄嬌鐢ㄥ師鍨嬪璞″彲浠ュぇ閲忓噺灝戞瘡涓璞″鍐呭瓨鐨勯渶姹傞噺錛屽洜涓哄璞″彲浠ョ戶鎵胯澶氬睘鎬с備簩鏄嵆浣垮睘鎬у湪瀵硅薄琚垱寤轟箣鍚庢墠娣誨姞鍒板畠鐨勫師鍨嬪璞′腑錛屽璞′篃鑳藉緇ф壙榪欎簺灞炴с?br />*
* 姣忎釜綾婚兘鏈変竴涓師鍨嬪璞★紝榪欎釜鍘熷瀷瀵硅薄閮藉叿鏈変竴濂楀睘鎬с備絾鏄疄闄呬笂鍗存湁澶ч噺鐨勭被瀹炰緥錛屾瘡涓疄渚嬮兘鑳界戶鎵垮師鍨嬪璞＄殑灞炴с傜敱浜庝竴涓師鍨嬪璞¤兘澶熻澶氫釜瀵硅薄緇ф壙錛屾墍浠avascript
* 蹇呴』寮哄寲璇誨啓灞炴у間箣闂寸殑涓嶅縐版с傚湪璇誨璞鐨勫睘鎬鏃訛紝javas浼?xì)棣栧厛妫鏌鏄惁鍏鋒湁涓涓悕涓簆鐨勫睘鎬с傚鏋渙娌℃湁榪欎釜灞炴э紝javascript灝變細(xì)鍐嶆鏌鐨勫師鍨嬪璞℃槸鍚﹀叿鏈夎繖涓睘鎬с傝繖鏍鋒墠浣垮緱浠ュ師鍨嬩負(fù)鍩虹鐨勭戶鎵挎満鍒惰搗浣滅敤銆?br />*
* 浣嗘槸褰撳啓涓涓睘鎬х殑鍊兼椂錛宩avascript騫朵笉浼?xì)妫鏌ュ師鍨嬪璞′腑鏄惁鏈夎繖涓睘鎬х殑鍊箋傚洜涓猴紝濡傛灉鍏佽鏀瑰彉鍘熷瀷瀵硅薄鐨勮繖涓灞炴э紝閭ｅ氨鏀瑰彉浜嗘暣涓璞＄被鐨刾鍊鹼紝鍖呮嫭鍏朵粬new鍑烘潵鐨勫璞″彉閲忕殑灞炴у箋?br />*
* 鍥犳錛屽睘鎬х殑緇ф壙鍙彂鐢熷湪璇誨睘鎬у兼椂錛岃屼笉浼?xì)鍙戠敓鍦ㄥ啓灞炴у兼椂銆傚鏋滀綘璁劇疆鐨勫璞鐨勫睘鎬鏄璞浠庡畠鐨勫師鍨嬪璞＄戶鎵胯屾潵鐨勶紝閭ｄ箞緇撴灉灝辨槸浣犵洿鎺ュ湪瀵硅薄o涓垱寤轟簡涓涓柊灞炴銆傜幇鍦╫宸茬粡鏈変簡涓涓嚜宸辯殑鍚嶄負(fù)p鐨勫睘鎬э紝瀹冨氨涓嶄細(xì)鍐嶄粠瀹冪殑鍘熷瀷瀵硅薄緇ф壙p鐨勫間簡銆傚綋浣犺p鐨勫兼椂錛宩ava棣栧厛鏌ヨo鐨勫睘鎬с?br />* 鐢變簬瀹冨彂鐜頒簡o涓畾涔夌殑p錛屽氨涓嶅繀鍐嶆煡璇㈠師鍨嬪璞★紝涔熷氨涓嶄細(xì)鍐嶅彂鐜板師鍨嬪璞′腑瀹氫箟鐨刾鍊間簡銆傛垜浠О涔嬩負(fù)o涓殑p”閬斀”浜嗘垨鑰呰”闅愯棌”浜嗗師鍨嬪璞′腑鐨勫睘鎬銆?br />*
* 鍥犱負(fù)鍘熷瀷瀵硅薄鐨勫睘鎬ц涓涓被鐨勬墍鏈夊璞″叡浜紝鎵浠ラ氬父鍙敤瀹冧滑鏉ュ畾涔夌被涓墍鏈夊璞＄殑鐩稿悓鐨勫睘鎬с傝繖浣垮緱鍘熷瀷瀵硅薄閫傜敤浜庢柟娉曞畾涔夊拰甯擱噺鐨勫畾涔夈?br />*/
10. 瀹炰緥灞炴с佸疄渚嬫柟娉曘佺被灞炴с佺被鏂規(guī)硶
* 姣忎釜瀵硅薄閮芥湁瀹冭嚜宸卞崟鐙殑瀹炰緥灞炴х殑鍓湰銆傛垜浠javas涓殑瀹炰緥灞炴ф槸閭ｄ簺鍦ㄥ璞′腑鐢ㄦ瀯閫犲嚱鏁板垱寤虹殑鎴栧垵濮嬪寲鐨勫睘鎬с?br />*
* 瀹炰緥鏂規(guī)硶鏄敱鐗瑰畾瀵硅薄鎴栧疄渚嬭皟鐢ㄧ殑銆傚疄渚嬫柟娉曚嬌鐢ㄤ簡鍏抽敭瀛梩his鏉ュ紩鐢ㄥ畠浠鎿嶄綔鐨勫璞℃垨瀹炰緥銆傝櫧鐒朵竴涓被鐨勪換浣曞疄渚嬮兘鍙互璋冪敤瀹炰緥鏂規(guī)硶錛屽茍涓嶆剰鍛崇潃姣忎釜瀵硅薄閮藉儚瀹炰緥灞炴ч偅鏍峰惈鏈夎嚜宸變笓鏈夌殑鏂規(guī)硶鍓湰銆傜浉鍙嶏紝姣忎釜瀹炰緥鏂規(guī)硶閮芥槸鐢辯被鐨勬墍鏈夊疄渚嬪叡浜殑銆傚湪javascript涓紝緇欑被瀹氫箟涓涓疄渚嬫柟娉曪紝鏄氳繃鎶婃瀯閫犲嚱鏁扮殑鍘熷瀷瀵硅薄涓殑涓涓睘鎬ц緗負(fù)鍑芥暟鍊兼潵瀹炵幇鐨勩?br />* 榪欐牱錛岀敱閭ｄ釜鏋勯犲嚱鏁板垱寤虹殑鎵鏈夊疄渚嬮兘浼?xì)鍏变韩涓涓凡緇ф壙鐨勫鍑芥暟鐨勫紩鐢ㄣ?br />*
* 綾誨睘鎬ц〃紺哄湪鎵鏈夌被瀹炰緥涓彧鏈変竴涓壇鏈傚湪javascript涓紝綾誨睘鎬ф湰璐ㄤ笂灝辨槸鍏ㄥ眬鍙橀噺銆備絾鏄畠浠笌涓涓被鍏寵仈鍦ㄤ竴璧鳳紝鍦╦avascript鐨勫悕瀛楃┖闂翠腑鎷ユ湁涓涓昏緫浣嶇疆錛岃繖鏍峰畠浠氨涓嶄細(xì)琚叾浠栫殑鍚屽悕灞炴ц鐩栥?br />* 濡侰ircle.PI=3.14銆傝櫧鐒禖ircle鏄竴涓瀯閫犲嚱鏁幫紝浣嗘槸鐢變簬javascript鍑芥暟鏄璞★紝鎵浠ユ垜浠彲浠ュ垱寤哄嚱鏁扮殑灞炴э紝灝卞儚鍒涘緩瀵硅薄鐨勫睘鎬т竴鏍楓?br />*
* 綾繪柟娉曚笌綾誨睘鎬х浉浼箋傚湪javascript涓紝瑕佸畾涔変竴涓被鏂規(guī)硶錛屽彧闇瑕佺敤鍚堥傜殑鍑芥暟浣滀負(fù)鏋勯犲嚱鏁扮殑灞炴у嵆鍙?br />*/
11. 鐖剁被鍜屽瓙綾?
* 鍦╦avascript涓紝Object綾繪墍鏈夌被鐨勭埗綾伙紝澶勪簬綾誨眰嬈″浘鐨勬渶涓婂眰銆傛墍鏈夌殑綾婚兘緇ф壙浜哋bject綾葷殑鎵鏈夋柟娉曘?br />*
* 鎴戜滑宸茬粡瀛︿細(xì)浜嗗璞″浣曚粠瀹冧滑鏋勯犲嚱鏁扮殑鍘熷瀷瀵硅薄涓戶鎵垮睘鎬э紝閭ｄ箞瀹冧滑鍙堟槸濡備綍緇ф壙綾籓bject鐨勫睘鎬у摢錛熸垜浠煡閬擄紝鍘熷瀷瀵硅薄鏈韓灝辨槸涓涓璞★紝瀹冩槸鐢辨瀯閫犲嚱鏁癘bject()鍒涘緩鐨勩?br />* 榪欏氨鎰忓懗鐫鍘熷瀷瀵硅薄緇ф壙浜哋bject.prototype灞炴с傚洜姝わ紝ret1浼?xì)鐟翩壙Rectangle.prototype鐨勫睘鎬э紝榪樹細(xì)緇ф壙Object.prototype鐨勫睘鎬с傛暣鍥犱負(fù)鎵鏈夊璞＄殑prototype灞炴т細(xì)緇ф壙Object.prototype灞炴э紝
* 鎵浠ユ墍鏈塲avascript瀛愮被閮界戶鎵夸簡Object鐨勬墍鏈夊睘鎬э紝涔熷嵆Object綾繪槸javascript鐨勬牴綾伙紝澶勪簬綾誨眰嬈″浘鐨勬渶欏跺眰銆?br />*/
12.浣跨敤[]璇誨彇鍜岃緗璞＄殑灞炴?
* 閫氬父浼?xì)閲囩敤鐐瑰彲偪惤帡绗﹁畨K棶瀵硅薄鐨勫睘鎬э紝浣嗘槸鐐瑰彿鍚庨潰鐨勫睘鎬ф槸鏍囪瘑絎︺傚湪javascript涓紝鏍囪瘑絎﹀繀欏婚愬瓧杈撳叆錛屽畠浠笉鏄竴縐嶆暟鎹被鍨嬨傚鏋滅▼搴忎腑灞炴ф槸鍔ㄦ佺殑銆佷笉紜畾鐨勶紝閭ｄ箞鎴戜滑灝嗘棤娉曡闂?br />* 鍓嶉潰瑙ｉ噴榪囷紝瀵硅薄鏄竴緹ゅ睘鎬х殑闆嗗悎錛屼篃灝辨槸鏁扮粍銆傞偅涔堝彲浠ヤ嬌鐢ㄦ暟緇勮闂垚鍛樼殑榪愮畻絎]鏉ヨ闂璞＄殑灞炴с俒]涓槸灞炴у悕縐幫紝鏄瓧絎︿覆綾誨瀷錛屾垜浠氨鍙互鍔ㄦ佺殑紜畾瀵硅薄灞炴у悕縐頒簡銆?br />*
* 浣跨敤[]榪愮畻絎︾殑瀵硅薄鎴戜滑涔熺О涔嬩負(fù)鍏寵仈鏁扮粍銆傚叧鑱旀暟緇勬槸涓縐嶆暟鎹粨鏋勶紝鍏佽浣犲姩鎬佸湴灝嗕換鎰忓煎拰浠繪剰瀛楃涓插叧鑱斿湪涓璧楓傚疄闄呬笂錛宩avascript瀵硅薄鍦ㄥ唴閮ㄥ氨鏄敤鍏寵仈鏁扮粍瀹炵幇鐨勩備嬌鐢ㄧ偣鍙瘋繍綆楃鍙槸涓轟簡鏄粬浠湅璧鋒潵鏇村儚C++鍜孞ava鐨勯潤鎬佸璞¤屽凡銆?br />*
* 鍓嶉潰鐨刦or/in寰幆瀹為檯涓婃槸瀵規(guī)暟緇勭殑鎿嶄綔銆?br />*
* 鎴戜滑閫氬父鎰忎箟璇寸殑鏁扮粍鏄皢浠諱綍鍊煎拰闈炶礋鏁存暟鍏寵仈鍦ㄤ竴璧風(fēng)殑鏁版嵁緇撴瀯銆?br />*
* 鏁扮粍瀹為檯涓婃槸涓涓叿鏈夐澶栧姛鑳藉眰鐨勫璞°傚var a = new Array();window.alert(typeof a);杈撳嚭Object銆?br />*/
13. Object綾葷殑灞炴у拰鏂規(guī)硶
* constructor灞炴ц〃紺哄垵濮嬪寲璇ュ璞＄殑鏋勯犲嚱鏁般傚洜姝わ紝鍙互浣跨敤璇ュ睘鎬ф潵鍒ゆ柇瀵硅薄鐨勭被鍨嬨?br />*/
function A(){return “aaaaaaaaa”};
var a = new A();
window.alert(a.constructor); //杈撳嚭鐨勬槸A鐨勫嚱鏁板畾涔?br />window.alert(a.constructor==A); //緇撴灉鏄痶rue
window.alert(a.constructor()); //杈撳嚭aaaaaaaaaa
/**
* toString()鏂規(guī)硶娌℃湁浠諱綍瀹為檯鍙傛暟錛屽畠榪斿洖鐨勬槸涓涓瓧絎︿覆錛岃瀛楃涓蹭唬琛ㄤ簡璋冪敤瀹冪殑瀵硅薄鐨勭被鍨嬫垨鍊箋傚綋javascript闇瑕佸皢涓涓璞¤漿鍖栨垚瀛楃涓叉椂灝辮皟鐢ㄨ繖涓璞＄殑toString鏂規(guī)硶銆?br />* 渚嬪錛屽綋鐢ㄨ繍綆楃”+”鎶婁竴涓瓧絎︿覆鍜屼竴涓璞¤繛鎺ュ埌涓璧鋒椂錛屾垨鑰呮妸涓涓璞′紶閫掔粰alert()鎴杁ocument.write()鏂規(guī)硶鏃訛紝灝變細(xì)璋冪敤toString()鏂規(guī)硶銆?br />*/
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