Javascript 은 OOP 를 기반 으로 탐측 기 기능 코드 인 스 턴 스 를 실현 합 니 다.

<script>
/*                  ，          ，        nodejs*/
/*container     */
/*link     */

/*                 ，                 */

!function(global){
  function DetectorBase(configs){//              ，    new，   new    
    /*  new  ，this          ，this instanceof DetectorBase    true，            new  */
    if(!this instanceof DetectorBase){/**/
      throw new Error('Do not invoke without new.');
    }
    this.configs=configs;/*         config  */
    this.analyze();/*                     */

  }

  DetectorBase.prototype.detect=function(){/*           ，                    ，              */
    throw new Error('Not implemented');
  }

  DetectorBase.prototype.analyze=function(){
    console.log('analyzing...');
    this.data="###data###";
  }

  /***    ***/
  function LinkDetector(links){/*     ，      new   */
    DetectorBase.apply(this,arguments);
    if(!this instanceof LinkDetector){
      throw new Error('Do not invoke without new.');
    }
    this.links=links;

  }

  function ContainerDetector(containers){
    DetectorBase.apply(this,arguments);
    if(!this instanceof ContainerDetector){
      throw new Error('Do not invoke without new.');
    }
    this.containers=containers;
  }
  //inherit first
  /*LinkDetector ContainerDetector            
      ，            ，    。
            LinkDetector prototype  */
  inherit(LinkDetector,DetectorBase);
  inherit(ContainerDetector,DetectorBase);

  //expand later
  LinkDetector.prototype.detect=function(){
    console.log('Loading data:'+this.data);
    console.log('Link detection started.');
    console.log('Scaning links:'+this.links);
  }

  ContainerDetector.prototype.detect=function(){
    console.log('Loading data:'+this.data);
    console.log('Container detection started.');
    console.log('Scaning containers:'+this.containers);
  }

  //prevent from being altered
  /*          ，   ，    ，   */
  Object.freeze(DetectorBase);
  Object.freeze(DetectorBase.prototype);
  Object.freeze(LinkDetector);
  Object.freeze(LinkDetector.prototype);
  Object.freeze(ContainerDetector);
  Object.freeze(ContainerDetector.prototype);



  //export to global object
  /*  defineProperties    3       ，           ，        */
  Object.defineProperties(global,{
    LinkDetector:{value:LinkDetector},
    ContainerDetector:{value:ContainerDetector},
    DetectorBase:{value:DetectorBase}
  });


  function inherit(subClass,superClass){//
    subClass.prototype=Object.create(superClass.prototype);
    subClass.prototype.constructor=subClass;
  }

}(this);

var cd=new ContainerDetector('#abc #def #ghi');
var ld=new LinkDetector('http://www.taobao.com http://www.tmall.com http://www.baidu.com');
cd.detect();
ld.detect();

</script>