eslint/docs/rules/no-array-constructor.md

   1 # disallow `Array` constructors (no-array-constructor)
   2
   3 Use of the `Array` constructor to construct a new array is generally
   4 discouraged in favor of array literal notation because of the single-argument
   5 pitfall and because the `Array` global may be redefined. The exception is when
   6 the Array constructor is used to intentionally create sparse arrays of a
   7 specified size by giving the constructor a single numeric argument.
   8
   9 ## Rule Details
  10
  11 This rule disallows `Array` constructors.
  12
  13 Examples of **incorrect** code for this rule:
  14
  15 ```js
  16 /*eslint no-array-constructor: "error"*/
  17
  18 Array(0, 1, 2)
  19
  20 new Array(0, 1, 2)
  21 ```
  22
  23 Examples of **correct** code for this rule:
  24
  25 ```js
  26 /*eslint no-array-constructor: "error"*/
  27
  28 Array(500)
  29
  30 new Array(someOtherArray.length)
  31
  32 [0, 1, 2]
  33 ```
  34
  35 ## When Not To Use It
  36
  37 This rule enforces a nearly universal stylistic concern. That being said, this
  38 rule may be disabled if the constructor style is preferred.
  39
  40 ## Related Rules
  41
  42 * [no-new-object](no-new-object.md)
  43 * [no-new-wrappers](no-new-wrappers.md)