| var toString = Object.prototype.toString; |
| |
| module.exports = function kindOf(val) { |
| if (val === void 0) return 'undefined'; |
| if (val === null) return 'null'; |
| |
| var type = typeof val; |
| if (type === 'boolean') return 'boolean'; |
| if (type === 'string') return 'string'; |
| if (type === 'number') return 'number'; |
| if (type === 'symbol') return 'symbol'; |
| if (type === 'function') { |
| return isGeneratorFn(val) ? 'generatorfunction' : 'function'; |
| } |
| |
| if (isArray(val)) return 'array'; |
| if (isBuffer(val)) return 'buffer'; |
| if (isArguments(val)) return 'arguments'; |
| if (isDate(val)) return 'date'; |
| if (isError(val)) return 'error'; |
| if (isRegexp(val)) return 'regexp'; |
| |
| switch (ctorName(val)) { |
| case 'Symbol': return 'symbol'; |
| case 'Promise': return 'promise'; |
| |
| // Set, Map, WeakSet, WeakMap |
| case 'WeakMap': return 'weakmap'; |
| case 'WeakSet': return 'weakset'; |
| case 'Map': return 'map'; |
| case 'Set': return 'set'; |
| |
| // 8-bit typed arrays |
| case 'Int8Array': return 'int8array'; |
| case 'Uint8Array': return 'uint8array'; |
| case 'Uint8ClampedArray': return 'uint8clampedarray'; |
| |
| // 16-bit typed arrays |
| case 'Int16Array': return 'int16array'; |
| case 'Uint16Array': return 'uint16array'; |
| |
| // 32-bit typed arrays |
| case 'Int32Array': return 'int32array'; |
| case 'Uint32Array': return 'uint32array'; |
| case 'Float32Array': return 'float32array'; |
| case 'Float64Array': return 'float64array'; |
| } |
| |
| if (isGeneratorObj(val)) { |
| return 'generator'; |
| } |
| |
| // Non-plain objects |
| type = toString.call(val); |
| switch (type) { |
| case '[object Object]': return 'object'; |
| // iterators |
| case '[object Map Iterator]': return 'mapiterator'; |
| case '[object Set Iterator]': return 'setiterator'; |
| case '[object String Iterator]': return 'stringiterator'; |
| case '[object Array Iterator]': return 'arrayiterator'; |
| } |
| |
| // other |
| return type.slice(8, -1).toLowerCase().replace(/\s/g, ''); |
| }; |
| |
| function ctorName(val) { |
| return val.constructor ? val.constructor.name : null; |
| } |
| |
| function isArray(val) { |
| if (Array.isArray) return Array.isArray(val); |
| return val instanceof Array; |
| } |
| |
| function isError(val) { |
| return val instanceof Error || (typeof val.message === 'string' && val.constructor && typeof val.constructor.stackTraceLimit === 'number'); |
| } |
| |
| function isDate(val) { |
| if (val instanceof Date) return true; |
| return typeof val.toDateString === 'function' |
| && typeof val.getDate === 'function' |
| && typeof val.setDate === 'function'; |
| } |
| |
| function isRegexp(val) { |
| if (val instanceof RegExp) return true; |
| return typeof val.flags === 'string' |
| && typeof val.ignoreCase === 'boolean' |
| && typeof val.multiline === 'boolean' |
| && typeof val.global === 'boolean'; |
| } |
| |
| function isGeneratorFn(name, val) { |
| return ctorName(name) === 'GeneratorFunction'; |
| } |
| |
| function isGeneratorObj(val) { |
| return typeof val.throw === 'function' |
| && typeof val.return === 'function' |
| && typeof val.next === 'function'; |
| } |
| |
| function isArguments(val) { |
| try { |
| if (typeof val.length === 'number' && typeof val.callee === 'function') { |
| return true; |
| } |
| } catch (err) { |
| if (err.message.indexOf('callee') !== -1) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * If you need to support Safari 5-7 (8-10 yr-old browser), |
| * take a look at https://github.com/feross/is-buffer |
| */ |
| |
| function isBuffer(val) { |
| if (val.constructor && typeof val.constructor.isBuffer === 'function') { |
| return val.constructor.isBuffer(val); |
| } |
| return false; |
| } |