摘要： var a = {a:1,b:2,c:3}; console.log(a); a.a = 2; console.log(a); var b = {a:1,b:{a:2},c:3}; console.log(b); b.b.a=4; console.log(b);输出：Object {a=1,b=2,c=3} //修改前Object {a=2,b=2,c=3} //修改后Object ... 阅读全文