javascript大小写转化

Question

var obj = { "a": 1, "b": 2, "c": 3 }; 如何将obj中a,b,c转换成大写？

Answer 1

  let obj1 =Object.create(obj);

  for ( i in obj1){

    let I = i.toUpperCase();

    obj1[I] = obj[i];

  }