js判断数据类型最准确的方法之一

function getType(data) {
  const type = Object.prototype.toString.call(data);
  let res = '';
  switch (type) {
    case '[object Object]':
      res = 'Object';
      break;
    case '[object Array]':
      res = 'Array';
      break;
    case '[object String]':
      res = 'String';
      break;
    case '[object Number]':
      res = 'Number';
      break;
    case '[object Undefined]':
      res = 'Undefined';
      break;
    case '[object Null]':
      res = 'Null';
      break;
    case '[object Function]':
      res = 'Function';
      break;
    case '[object Boolean]':
      res = 'Boolean';
      break;
    case '[object Symbol]':
      res = 'Symbol';
      break;
    case '[object BigInt]':
      res = 'BigInt';
      break;
    default:
      break;
  }

}

console.log('getType({}): ', getType({}));
console.log('getType([]): ', getType([]));
console.log('getType("123"): ', getType('123'));
console.log('getType(123): ', getType(123));
console.log('getType(): ', getType());
console.log('getType(null): ', getType(null));
console.log('getType(()=>{}): ', getType(()=>{}));
console.log('getType(true): ', getType(true));
console.log('getType(Symbol()): ', getType(Symbol()));
console.log('getType(BigInt(123)): ', getType(BigInt(123)));