function deepCopy(originData){
const newData = originData.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for(let key in originData){ // 遍历目标
if(originData.hasOwnProperty(key)){
if(originData[key] && typeof originData[key] === ‘object‘){ // 如果值是对象,就递归一下
newData[key] = originData[key].constructor === Array ? [] : {};
newData[key] = deepCopy(originData[key]);
}else{ // 如果不是,就直接赋值
newData[key] = originData[key];
}
}
}
return newData;
}
试用一下:
const originObj = {a:‘a‘,b:‘b‘,c:[1,2,3],d:{dd:‘dd‘}};
const cloneObj = deepCopy(originObj);
console.log(cloneObj === originObj); // false
cloneObj.a = ‘A‘;
cloneObj.c = [4,5,6];
cloneObj.d.dd = ‘DD‘;
console.log(originObj); // {a:‘a‘,b:‘b‘,c:[1,2,3],d:{dd:‘dd‘}};
console.log(cloneObj); // {a:‘A‘,b:‘b‘,c:[4,5,6],d:{dd:‘DD‘}};