[JavaScript] JavaScript通过prototype给对象定义属性 →→→→→进入此内容的聊天室

来自 , 2019-06-12, 写在 JavaScript, 查看 100 次.
URL http://www.code666.cn/view/53046869
  1. <script type="text/javascript"> <!--
  2. function movieToString() {
  3.    return("title: "+this.title+"  director: "+this.director);
  4.    }
  5. function movie(title, director) {
  6.    this.title = title;
  7.    this.director = director || "unknown"; //if null assign to "unknown"
  8.    this.toString = movieToString; //assign function to this method pointer
  9.    }
  10.    
  11. var officeSpace = new movie("OfficeSpace");
  12. var narnia = new movie("Narnia","Andrew Adamson");
  13. movie.prototype.isComedy = false; //add a field to the movie's prototype
  14. document.write(narnia.toString());
  15. document.write("<br />Narnia a comedy? "+narnia.isComedy);
  16. officeSpace.isComedy = true; //override the default just for this object
  17. document.write("<br />Office Space a comedy? "+officeSpace.isComedy);
  18. //-->
  19. </script>
  20.  
  21. //javascript/8331

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