no-array-constructor.md

title	rule_type	related_rules
no-array-constructor	suggestion	no-new-wrappers no-object-constructor

Use of the Array constructor to construct a new array is generally discouraged in favor of array literal notation because of the single-argument pitfall and because the Array global may be redefined. The exception is when the Array constructor is used to intentionally create sparse arrays of a specified size by giving the constructor a single numeric argument.

Rule Details

This rule disallows Array constructors.

Examples of incorrect code for this rule:

:::incorrect

/*eslint no-array-constructor: "error"*/

Array();

Array(0, 1, 2);

new Array(0, 1, 2);

Array(...args);

:::

Examples of correct code for this rule:

:::correct

/*eslint no-array-constructor: "error"*/

Array(500);

new Array(someOtherArray.length);

[0, 1, 2];

const createArray = Array => new Array();

:::

When Not To Use It

This rule enforces a nearly universal stylistic concern. That being said, this rule may be disabled if the constructor style is preferred.