Categoryjs

js深拷贝

j

需要注意的是JS中,数组  instanceof Object为true let oldObj = { a:[1,2,3], b:null, c:undefined, d:{ a:1 } } let newObj = {} function deepCopy(newObj,oldObj) { for (let key in oldObj){ let item = oldObj[key] //注意此处要先判断Array,因为数组instanceof Object也为true if(item instanceof Array){ newObj[key]=[] deepCopy(newObj[key],item) }else if(item instanceof Object){ newObj[key]={} deepCopy(newObj[key],item) }else{...