Periksa Apakah Variabel Tidak Terdefinisi atau null. JavaScript

Periksa Apakah Variabel Tidak Terdefinisi atau null. JavaScript



undefined, null
JavaScript example code

JavaScript

  Output result
The variable is neither undefined nor null
The variable is neither undefined nor null
The variable is undefined or null
The variable is undefined or null
typeof
JavaScript example code

JavaScript

  Output result
The variable is neither undefined nor null
The variable is neither undefined nor null
The variable is undefined or null
The variable is undefined or null


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