immutable.js 简介

删除实例属性 const rr = r.remove('a'); // => Record { "a": 1, "b": 2 } 此外，Record 实例还具有扩展性 class ABRecord extends Record({a:1,b:2}) { getAB() { return this.a + this.b; } }var myRecord = new ABRecord({b: 3}) myRecord.getAB