ts-utility-plugins-docs
  • Overview
  • Business
    • business-upload
      • dragger-upload
    • business-tabs
    • business-carousel
    • business-draggable
      • sort-draggable
  • Canvas
    • canvas-colorful-bubble
    • canvas-jumping-characters
    • canvas-stars-line
  • Utility
    • utility-algorithm
      • sort
        • bubble-sort
        • select-sort
        • insert-sort
        • shell-sort
        • quick-sort
      • binary-search-tree
      • double-linked-circular-list
      • event-emitter
      • mini-redux
      • url-search-params
      • es6-achieve
        • _const
        • _reflect
        • _map
        • _reduce
        • _filter
        • _every
        • _find
        • _startsWith
        • _some
        • _includes
        • _findIndex
        • Dictionary
        • _Promise
    • utility-array
      • isStrictArray
      • toFlatArrayOutPlace
      • toStrictArray
      • trunk
      • compact
      • castArray
      • _concat
      • difference
      • drop
      • head
      • dropRight
      • dropRightWhile
      • fill
      • pullAll
      • zip
      • _join
      • take
    • utility-dom
      • getEle
      • getAllEle
      • setAttr
      • setCss
      • getAttr
      • addClass
      • removeClass
      • throttle
      • debounce
      • isDOM
      • traversalDOMWithBFS
      • traversalDOMWithDFS
      • traversalDOMWithNodeIterator
      • traversalDOMWithTreeWalker
      • convertPairToCSSText
      • _querySelector
    • utility-function
      • isFunction
      • _call
      • _bind
      • _new
      • getParamNames
      • compose
      • pipe
      • delay
      • after
      • curry
    • utility-number
      • getRadian
      • getFullRandom
      • getAnyRandom
      • inRange
      • divideByThousand
    • utility-object
      • isPlainObject
      • get
      • forIn
      • forOwn
      • create
    • utility-string
      • getRandomStr
      • trim
      • capitalize
      • endsWith
      • lowerCase
      • words
    • utility-date
      • now
      • dateFormat
    • utility-others
      • isBasicValue
      • isNull
      • isUndefined
      • invariant
      • convertHumpToHyphen
      • deepClone
      • eq
      • gt
      • _instanceOf
      • size
      • convertParameterToObject
      • binarySearch
      • listToTree
      • isBoolean
      • isNaN
      • isNumber
      • isString
      • isSymbol
      • sameValueZero
  • Extra
    • 如何贡献?
    • 贡献内容?
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  • 说明
  • 源码
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这有帮助吗？

  1. Utility
  2. utility-others

isUndefined

说明

判断是否为严格的undefined

源码

https://github.com/ddzy/ts-utility-plugins/tree/master/src/ddzy/utility/others/isUndefined

用法

isUndefined.test.ts
*
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最后更新于4年前

这有帮助吗？