@winner-fed/cloud-utils

Function: isNullAndUnDef

isNullAndUnDef(val): boolean

判断是否为空值且未定义

Parameters

Name	Type	Description
`val`	`unknown`	要判断的值

Returns

boolean

是否为空值且未定义

Example

isNullAndUnDef(null); // => false
isNullAndUnDef(undefined); // => false
isNullAndUnDef(''); // => false

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