const getObjType = function (obj){ var toString = Object.prototype.toString; var map = { ‘[object Boolean]‘: ‘boolean‘, ‘[object Number]‘: ‘number‘, ‘[object String]‘: ‘string‘, ‘[object Function]‘: ‘function‘, ‘[object Array]‘: ‘array‘, ‘[object Date]‘: ‘date‘, ‘[object RegExp]‘: ‘regExp‘, ‘[object Undefined]‘: ‘undefined‘, ‘[object Null]‘: ‘null‘, ‘[object Object]‘: ‘object‘ }; if (obj instanceof Element) { return ‘element‘; } return map[toString.call(obj)]; };

js 获取数据类型