a-type-of-js v0.0.5

a-type-of-js

A simple type determination tool

use

import { typeOf } from 'a-type-of-js';

const num = 1;

if (typeOf(num) === 'number') {
  console.log('num is number');
} else {
  console.log('num is not number');
}

Use the is type judgment in 'ts' for type-safe contraction

import { isString, isNumber } from 'a-type-of-js';

function doSomething(value: string | number) {
  if (isString(value)) {
    value.toLocaleUpperCase();
  } else if (isNumber(value)) {
    value.toFixed(2);
  }
}

doSomething('hello'); // HELLO
doSomething(1); // 1.00

Documents provide type detection:

• isString strings, String objects
• isNumber number, Number object
• isBoolean boolean, Boolean object constructed
• isNull null
• isUndefined undefined
• isNaN NaN (NaN is a special value NaN !== NaN even if typeof NaN returns number)
• isFunction function
• isArray array, Array object
• isSymbol symbol
• isBigInt is a large integer
• isPlainObject object (normal object, not other built-in object types)
• isPromise Promise
• isAsyncFunction is an asynchronous function
• isDate time
• isMap Map
• isSet Set
• isWeakMap WeakMap
• isWeakSet WeakSet
• isGenerator generator
• isGeneratorFunction generator function
• isBigInt64Array BigInt64Array
• isBigUint64Array BigUint64Array
• isDataView DataView
• isArrayBuffer ArrayBuffer
• isRegExp regex, RegExp object-built regex
• isSharedArrayBuffer SharedArrayBuffer
• isUint8ClampedArray Uint8ClampedArray
• isInt8Array Int8Array
• isUint8Array Uint8Array
• isTypedArray TypedArray
• isInt16Array Int16Array
• isUint16Array Uint16Array
• isInt32Array Int32Array
• isUint32Array Uint32Array
• isFloat32Array Float32Array
• isFloat64Array Float64Array
• isIntlCollator Intl.Collator
• isIntlDateTimeFormat Intl.DateTimeFormat
• isIntlDisplayNames Intl.DisplayNames
• isIntlListFormat Intl.ListFormat
• isIntlLocale Intl.Locale
• isIntlNumberFormat Intl.NumberFormat
• isError error
• isEvalError eval error
• isRangeError range error
• isReferenceError reference error
• isSyntaxError syntax error
• isTypeError type error
• isURIError uri error
• isAggregateError aggregate error

Documentation

see https://earthnut.dev/a-type-of-js/