JavaScript Inheritance Method (4)

4. inherit tool function 4 viewsourceprint? 01/** & nbsp; 02 & nbsp; * @ param {String} className & nbsp; 03 & nbsp; * @ param {String/Function} superClass & nbsp; 04 & nbsp; * @ param {Function} classImp & nbsp

4. inherit from tool function 4

View sourceprint? 01 /**

02 * @ param {String} className

03 * @ param {String/Function} superClass

04 * @ param {Function} classImp

05 */

06 function $ class (className, superClass, classImp ){

07 if (superClass = "") superClass = Object;

08 var clazz = function (){

09 return function (){

10 if (typeof this. init = "function "){

11 this. init. apply (this, arguments );

12}

13 };

14 }();

15 var p = clazz. prototype = new superClass ();

16 var _ super = superClass. prototype;

17 window [className] = clazz;

18 classImp. apply (p, [_ super]);

19}

Define parent class Person

View sourceprint? 01 /**

02 * parent class Person

03 */

04 $ class (Person, function (){

05 this. init = function (name ){

06 this. name = name;

07 };

08 this. getName = function (){

09 return this. name;

10 };

11 this. setName = function (name ){

12 this. name = name;

13}

14 });

Subclass Man

View sourceprint? 01 /**

02 * subclass Man

03 */

04 $ class (Man, Person, function (supr ){

05 this. init = function (name, age ){

06 supr. init. apply (this, [name]); // this sentence is very important.

07 this. age = age;

08 };

09 this. getAge = function (){

10 return this. age;

11 };

12 this. setAge = function (age ){

13 this. age = age;

14 };

15 });

16 var m = new Man (Jack, 25 );

17 console. log (m. name); // Jack

18 console. log (m. age); // 25

From the output, we can see that the sub-class Man does inherit the attributes and methods of the parent class.