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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| import utils from 'core-util-is' | ||
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| const toString = Function.prototype.toString | ||
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| function fnBody (fn) { | ||
| return toString.call(fn).replace(/^[^{]*{\s*/, '').replace(/\s*}[^}]*$/, '') | ||
| } | ||
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| export const isClass = function (fn) { | ||
| return (typeof fn === 'function' && | ||
| (/^class\s/.test(toString.call(fn)) || | ||
| (/^.*classCallCheck\(/.test(fnBody(fn)))) // babel.js | ||
| ) | ||
| } | ||
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| export const isFinite = function (obj) { | ||
| return Number.isFinite(obj) | ||
| } | ||
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| export const isNaN = function (obj) { | ||
| return Number.isNaN(obj) | ||
| } | ||
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| export const isGenerator = function (obj) { | ||
| return obj | ||
| && 'function' === typeof obj.next | ||
| && 'function' === typeof obj.throw | ||
| } | ||
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| export const isGeneratorFunction = function (obj) { | ||
| return obj | ||
| && obj.constructor | ||
| && 'GeneratorFunction' === obj.constructor.name | ||
| } | ||
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| export const isAsyncFunction = function (obj) { | ||
| return obj | ||
| && obj.constructor | ||
| && 'AsyncFunction' === obj.constructor.name | ||
| } | ||
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| export const isPromise = function (obj) { | ||
| return obj | ||
| && 'function' === typeof obj.then | ||
| } | ||
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| const MAX_INT_31 = Math.pow(2, 31) | ||
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| export const isInt = function (obj) { | ||
| return utils.isNumber(obj) | ||
| && obj % 1 === 0 | ||
| } | ||
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| export const isInt32 = function (obj) { | ||
| return isInt(obj) | ||
| && obj < MAX_INT_31 | ||
| && obj >= -MAX_INT_31 | ||
| } | ||
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| export const isLong = function (obj) { | ||
| return isInt(obj) | ||
| && (obj >= MAX_INT_31 || obj < -MAX_INT_31) | ||
| } | ||
|
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| export const isDouble = function (obj) { | ||
| return utils.isNumber(obj) | ||
| && !isNaN(obj) | ||
| && obj % 1 !== 0 | ||
| } | ||
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| /** | ||
| * override core-util-is | ||
| */ | ||
| export const isNullOrUndefined = utils.isNullOrUndefined | ||
| export const isNumber = utils.isNumber | ||
| export const isSymbol = utils.isSymbol | ||
| export const isString = utils.isString | ||
| export const isUndefined = utils.isUndefined | ||
| export const isBoolean = utils.isBoolean | ||
| export const isObject = utils.isObject | ||
| export const isNull = utils.isNull | ||
| export const isPrimitive = utils.isPrimitive | ||
| export const isBuffer = utils.isBuffer | ||
| export const isFunction = utils.isFunction | ||
| export const isDate = function isDate (obj) { | ||
| return obj instanceof Date | ||
| } | ||
| export const isRegExp = function isRegExp (obj) { | ||
| return obj instanceof RegExp | ||
| } | ||
| export const isError = function isError (obj) { | ||
| return obj instanceof Error | ||
| } | ||
| export const isArray = function isArray (obj) { | ||
| return Array.isArray(obj) | ||
| } | ||
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| export default utils |