For.. of can be used to traverse which data

for...of Statement to create a loop to iterate over an iteratable object . stay ES6 Introduced in for...of loop , To replace for...in and forEach() , And support new iterative protocols .for...of Allow you to traverse Arrays（ Array ）, Strings（ character string ）, Maps（ mapping ）, Sets（ aggregate ） Such as iterative data structure, etc .

notes ： Can't traverse object , If you want to traverse the object , have access to for…in To traverse the object .