怎么买一分快三—官方网址22270.COM_JavaScript 瀵硅薄

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怎么买一分快三—官方网址22270.COM_JavaScript 瀵硅薄

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怎么买一分快三—官方网址22270.COM灞炴ф槸涓庡璞＄浉鍏崇殑鍊笺

璁块棶瀵硅薄灞炴х殑璇硶鏄細

objectName.propertyName

杩欎釜渚嬪瓙浣跨敤浜 String 瀵硅薄鐨 length 灞炴ф潵鑾峰緱瀛楃涓茬殑闀垮害锛

var message="Hello World!";
var x=message.length;

鍦ㄤ互涓婁唬鐮佹墽琛屽悗锛寈 鐨勫煎皢鏄細

12

璁块棶瀵硅薄鐨勬柟娉

鏂规硶鏄兘澶熷湪瀵硅薄涓婃墽琛岀殑鍔ㄤ綔銆

鎮ㄥ彲浠ラ氳繃浠ヤ笅璇硶鏉ヨ皟鐢ㄦ柟娉曪細

objectName.methodName()

杩欎釜渚嬪瓙浣跨敤浜 String 瀵硅薄鐨 toUpperCase() 鏂规硶鏉ュ皢鏂囨湰杞崲涓哄ぇ鍐欙細

var message="Hello world!";
var x=message.toUpperCase();

鍦ㄤ互涓婁唬鐮佹墽琛屽悗锛寈 鐨勫煎皢鏄細

HELLO WORLD!

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鍒涘缓鐩存帴鐨勫疄渚

杩欎釜渚嬪瓙鍒涘缓浜嗗璞＄殑涓涓柊瀹炰緥锛屽苟鍚戝叾娣诲姞浜嗗洓涓睘鎬э細

瀹炰緥

person=new Object();
person.firstname="John";
person.lastname="Doe";
person.age=50;
person.eyecolor="blue";

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鏇夸唬璇硶锛堜娇鐢ㄥ璞 literals锛夛細

瀹炰緥

person={firstname:"John",lastname:"Doe",age:50,eyecolor:"blue"};

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浣跨敤瀵硅薄鏋勯犲櫒

鏈緥浣跨敤鍑芥暟鏉ユ瀯閫犲璞★細

瀹炰緥

function person(firstname,lastname,age,eyecolor) { this.firstname=firstname; this.lastname=lastname; this.age=age; this.eyecolor=eyecolor; }

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鍒涘缓 怎么买一分快三—官方网址22270.COM_JavaScript 瀵硅薄瀹炰緥

涓鏃︽偍鏈変簡瀵硅薄鏋勯犲櫒锛屽氨鍙互鍒涘缓鏂扮殑瀵硅薄瀹炰緥锛屽氨鍍忚繖鏍凤細

var myFather=new person("John","Doe",50,"blue");
var myMother=new person("Sally","Rally",48,"green");

鎶婂睘鎬ф坊鍔犲埌 怎么买一分快三—官方网址22270.COM_JavaScript 瀵硅薄

鎮ㄥ彲浠ラ氳繃涓哄璞¤祴鍊硷紝鍚戝凡鏈夊璞℃坊鍔犳柊灞炴э細

鍋囪 person 瀵硅薄宸插瓨鍦 - 鎮ㄥ彲浠ヤ负鍏舵坊鍔犺繖浜涙柊灞炴э細firstname銆乴astname銆乤ge 浠ュ強 eyecolor锛

person.firstname="John";
person.lastname="Doe";
person.age=30;
person.eyecolor="blue";

x=person.firstname;

鍦ㄤ互涓婁唬鐮佹墽琛屽悗锛寈 鐨勫煎皢鏄細

John

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鏂规硶鍙笉杩囨槸闄勫姞鍦ㄥ璞′笂鐨勫嚱鏁般

鍦ㄦ瀯閫犲櫒鍑芥暟鍐呴儴瀹氫箟瀵硅薄鐨勬柟娉曪細

function person(firstname,lastname,age,eyecolor)
{
    this.firstname=firstname;
    this.lastname=lastname;
    this.age=age;
    this.eyecolor=eyecolor;

    this.changeName=changeName;
    function changeName(name)
    {
        this.lastname=name;
    }
}

怎么买一分快三—官方网址22270.COMchangeName() 鍑芥暟 name 鐨勫艰祴缁 person 鐨 lastname 灞炴с

鐜板湪鎮ㄥ彲浠ヨ瘯涓涓嬶細

myMother.changeName("Doe");

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怎么买一分快三—官方网址22270.COM_JavaScript 绫

怎么买一分快三—官方网址22270.COM_JavaScript 鏄潰鍚戝璞＄殑璇█锛屼絾 怎么买一分快三—官方网址22270.COM_JavaScript 涓嶄娇鐢ㄧ被銆

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怎么买一分快三—官方网址22270.COM_JavaScript 鍩轰簬 prototype锛岃屼笉鏄熀浜庣被鐨勩

怎么买一分快三—官方网址22270.COM_JavaScript for...in 寰幆

怎么买一分快三—官方网址22270.COM_JavaScript for...in 璇彞寰幆閬嶅巻瀵硅薄鐨勫睘鎬с

璇硶

for (variable in object)
{
    鎵ц鐨勪唬鐮……
}

娉ㄦ剰锛 for...in 寰幆涓殑浠ｇ爜鍧楀皢閽堝姣忎釜灞炴ф墽琛屼竴娆°

瀹炰緥

寰幆閬嶅巻瀵硅薄鐨勫睘鎬э細

瀹炰緥

var person={fname:"John",lname:"Doe",age:25}; for (x in person) { txt=txt + person[x]; }

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