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util.isUndefined()

util.isUndefined(object)

Stability: 0 - Deprecated

Returns true if the given "object" is undefined. Otherwise, returns false.

const util = require('util');

var foo;
util.isUndefined(5)
  // false
util.isUndefined(foo)
  // true
util.isUndefined(null)
  // false

Links:

https://nodejs.org/dist/latest-v5.x/docs/api/util.html#util_util_isundefined_object

doc_Nodejs

2016-04-30 04:43:07

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