[js] 第333天 用js实现typeof的功能

[haizhilin2013]

第333天 用js实现typeof的功能

作者：Indomi

我也要出题

[longhui520]

        function getType(obj){
            return Object.prototype.toString.call(obj).slice(8,-1).toLowerCase()
        }

[vizoy]

function getType(v) {
  return v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name
}

[wind8866]

const typeofFun = (value) => {
  const type = Object.prototype.toString.call(value).replace(/\[object |]/g, '').toLowerCase()
  const dic = ['undefined', 'number', 'boolean', 'symbol', 'string', 'function', 'bigint']
  if (dic.includes(type)) return type
  return 'object'
}

[mohaixiao]

function typeOf(value) {
    let type = Object.prototype.toString.call(value).slice(8,-1).toLowerCase()
    if(type.match(/^(function | undefined | number | symbol | string | bigint)$/)) return type
    return 'object'
}

[xiaoqiangz]

function myTypeOf(params) { const result = Object.prototype.toString.call(params).slice(8, -1).toLowerCase() let map = { number: 'number', array: 'Array', function: 'Function', undefined: 'undefined', string: 'String', object: 'Object', symbol: 'Symbol', null: 'Null', boolean: 'Boolean' } return map[result] }