这篇文章主要介绍“JavaScript怎么创建对象并为对象添加方法和属性”，在日常操作中，相信很多人在JavaScript怎么创建对象并为对象添加方法和属性问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”JavaScript怎么创建对象并为对象添加方法和属性”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
创建对象,为对象添加方法,属性,动态的添加和删除,示例代码如下:
{
var circle = {x:0,y:0,radius:2};
document.write("
圆心在：", circle.x," ",circle.y,"半径为:",circle.radius);
document.write("
函数创建对象
");
function student(name,chinese,math,english)
{
this.name=name;
this.chinese = chinese;
this.math = math;
this.english = english;
this.avg2=avg2;
}
//
function avg()
{
return ((this.chinese + this.math + this.english)/3);
}
function avg2()
{
return (((this.chinese + this.math + this.english)/3)+5);
}
}
{
var st1 = new student("zzc",88,95,20);
document.write("姓名"+ st1.name + "
");
document.write("语文"+ st1.chinese + "
");
document.write("数学"+ st1.math + "
");
document.write("英语"+ st1.english + "
");
st1.avg = avg;
var avgscore = st1.avg();
var avgscores = st1.avg2();
document.write("平均分"+ avgscore + "
");
document.write("平均分+5 = "+ avgscores + "
");
document.write("Delete object
");
document.write("st1对象属性和方法:
");
for(var i in st1)
document.write(st1[i]+ "
");
document.write("
删除对象的属性(english)方法(avg2)
");
delete st1.avg2;
delete st1.english;
for(var i in st1)
document.write(st1[i]+ "
");
}
到此，关于“JavaScript怎么创建对象并为对象添加方法和属性”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注创新互联网站，小编会继续努力为大家带来更多实用的文章！
