深度遍历，将所有value中的'123'去掉，key中的'123'不用管：
const walk = (obj) => {
const type = (kk) => Object.prototype.toString.call(kk).replace(/(\[object |])/g, '');
const fmt = (val) => {
if (['Object', 'Array'].includes(type(val))) {
walk(val);
return val;
}
if (type(val) !== 'String') return val;
return val.replace(/123/g, '')
};
if (type(obj) === 'Object') {
for (let i in obj) {
if (!obj.hasOwnProperty(i)) continue;
obj[i] = fmt(obj[i]);
}
} else if (type(obj) === 'Array') {
for (let i = obj.length - 1; i > -1; i--) {
obj[i] = fmt(obj[i]);
}
}
};
let aa = {a:'aa123bb', aa123bb: '456'}
walk(aa)
console.log(aa)
// {a:'aabb', aa123bb: '456'}