#### # new CheckUtil()

类型验证工具

查看源代码 common/util/CheckUtil.js, line 19

### 方法

#### # static isArguments(value)

Checks if `value` is likely an `arguments` object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 505

返回值:

Returns `true` if `value` is an `arguments` object, else `false`.

类型: boolean

##### 示例

    isArguments(function() { return arguments }())
    // => true

    isArguments([1, 2, 3])
    // => false

#### # static isArray(value)

Checks if `value` is `Array`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 277

返回值:

Returns `true` if `value` is `Array`, else `false`.

类型: boolean

##### 示例

    isArray([1,2,3])
    // => true

#### # static isArrayLike(value)

Checks if `value` is array-like. A value is considered array-like if it's not a function and has a `value.length` that's an integer greater than or equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 4.0.0

查看源代码 common/util/CheckUtil.js, line 304

返回值:

Returns `true` if `value` is array-like, else `false`.

类型: boolean

##### 示例

    isArrayLike([1, 2, 3])
    // => true

    isArrayLike(document.body.children)
    // => true

    isArrayLike('abc')
    // => true

    isArrayLike(Function)
    // => false

#### # static isArrayLikeObject(value)

This method is like `isArrayLike` except that it also checks if `value` is an object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 4.0.0

查看源代码 common/util/CheckUtil.js, line 335

返回值:

Returns `true` if `value` is an array-like object, else `false`.

类型: boolean

##### 示例

    isArrayLikeObject([1, 2, 3])
    // => true

    isArrayLikeObject(document.body.children)
    // => true

    isArrayLikeObject('abc')
    // => false

    isArrayLikeObject(Function)
    // => false

#### # static isBoolean(value)

Checks if `value` is classified as a boolean primitive or object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

查看源代码 common/util/CheckUtil.js, line 52

返回值:

Returns `true` if `value` is a boolean, else `false`.

类型: boolean

##### 示例

    isBoolean(false)
    // => true

    isBoolean(null)
    // => false

#### # static isElement(value)

Checks if `value` is likely a DOM element.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 452

返回值:

Returns `true` if `value` is a DOM element, else `false`.

类型: boolean

##### 示例

    isElement(document.body)
    // => true

    isElement('<body>')
    // => false

#### # static isError(value)

Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`, `SyntaxError`, `TypeError`, or `URIError` object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 3.0.0

查看源代码 common/util/CheckUtil.js, line 476

返回值:

Returns `true` if `value` is an error object, else `false`.

类型: boolean

##### 示例

    isError(new Error)
    // => true

    isError(Error)
    // => false

#### # static isFunction(value)

Checks if `value` is classified as a `Function` object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 139

返回值:

Returns `true` if `value` is a function, else `false`.

类型: boolean

##### 示例

    isFunction(class Any{})
    // => true

    isFunction(() => {})
    // => true

    isFunction(async () => {})
    // => true

    isFunction(function * Any() {})
    // => true

    isFunction(Math.round)
    // => true

    isFunction(/abc/)
    // => false

#### # static isLength(value)

Checks if `value` is a valid array-like length.

Note: This method is loosely based on `ToLength`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 4.0.0

查看源代码 common/util/CheckUtil.js, line 167

返回值:

Returns `true` if `value` is a valid length, else `false`.

类型: boolean

##### 示例

    isLength(3)
    // => true

    isLength(Number.MIN_VALUE)
    // => false

    isLength(Infinity)
    // => false

    isLength('3')
    // => false

#### # static isNative(value)

Checks if `value` is a pristine native function.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 3.0.0

查看源代码 common/util/CheckUtil.js, line 528

返回值:

Returns `true` if `value` is a native function, else `false`.

类型: boolean

##### 示例

    isNative(Array.prototype.push)
    // => true

    isNative(isDate)
    // => false

#### # static isNil(value)

Checks if `value` is `null` or `undefined`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 4.0.0

查看源代码 common/util/CheckUtil.js, line 357

返回值:

Returns `true` if `value` is nullish, else `false`.

类型: boolean

##### 示例

    isNil(null)
    // => true

    isNil(void 0)
    // => true

    isNil(NaN)
    // => false

#### # static isNull(value)

Checks if `value` is `null`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 261

返回值:

Returns `true` if `value` is `null`, else `false`.

类型: boolean

##### 示例

    isNull(null)
    // => true

    isNull(void 0)
    // => false

#### # static isNumber(value)

Checks if `value` is classified as a `Number` primitive or object.

Note: To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified as numbers, use the `Number.isFinite` method.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0
See:
  - isInteger, toInteger, toNumber

查看源代码 common/util/CheckUtil.js, line 386

返回值:

Returns `true` if `value` is a number, else `false`.

类型: boolean

##### 示例

    isNumber(3)
    // => true

    isNumber(Number.MIN_VALUE)
    // => true

    isNumber(Infinity)
    // => true

    isNumber('3')
    // => false

#### # static isObject(value)

Checks if `value` is the language type of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 84

返回值:

Returns `true` if `value` is an object, else `false`.

类型: boolean

##### 示例

    isObject({})
    // => true

    isObject([1, 2, 3])
    // => true

    isObject(Function)
    // => true

    isObject(null)
    // => false

#### # static isObjectLike(value)

Checks if `value` is object-like. A value is object-like if it's not `null` and has a `typeof` result of "object".

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

查看源代码 common/util/CheckUtil.js, line 108

返回值:

Returns `true` if `value` is object-like, else `false`.

类型: boolean

##### 示例

    isObjectLike({})
    // => true

    isObjectLike([1, 2, 3])
    // => true

    isObjectLike(Function)
    // => false

    isObjectLike(null)
    // => false

#### # static isPlainObject(value)

Checks if `value` is a plain object, that is, an object created by the `Object` constructor or one with a `[[Prototype]]` of `null`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.8.0

查看源代码 common/util/CheckUtil.js, line 420

返回值:

Returns `true` if `value` is a plain object, else `false`.

类型: boolean

##### 示例

    function Foo() {
      this.a = 1
    }

    isPlainObject(new Foo)
    // => false

    isPlainObject([1, 2, 3])
    // => false

    isPlainObject({ 'x': 0, 'y': 0 })
    // => true

    isPlainObject(Object.create(null))
    // => true

#### # static isString(value)

Checks if `value` is classified as a `String` primitive or object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 191

返回值:

Returns `true` if `value` is a string, else `false`.

类型: boolean

##### 示例

    isString('abc')
    // => true

    isString(1)
    // => false

#### # static isSymbol(value)

Checks if `value` is classified as a `Symbol` primitive or object.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 4.0.0

查看源代码 common/util/CheckUtil.js, line 217

返回值:

Returns `true` if `value` is a symbol, else `false`.

类型: boolean

##### 示例

    isSymbol(Symbol.iterator)
    // => true

    isSymbol('abc')
    // => false

#### # static isUndefined(value)

Checks if `value` is `undefined`.

#### 参数:

名称 | 类型 | 描述
--- | --- | ---
`value` | * | The value to check.

Since:
  - 0.1.0

查看源代码 common/util/CheckUtil.js, line 242

返回值:

Returns `true` if `value` is `undefined`, else `false`.

类型: boolean

##### 示例

    isUndefined(void 0)
    // => true

    isUndefined(null)
    // => false