useArrayLiterals
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Diagnostic Category: lint/correctness/useArrayLiterals
Since: v1.7.2
Sources:
- Same as:
no-array-constructor
Disallow Array constructors.
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 intentionally creates sparse arrays of a specified size by giving the constructor a single numeric argument.
Examples
Section titled ExamplesInvalid
Section titled InvalidArray();code-block.js:1:1 lint/correctness/useArrayLiterals ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Don’t use Array constructors.
> 1 │ Array();
│ ^^^^^^^^
2 │
ℹ Use of the Array constructor is not allowed except creating sparse arrays of a specified size by giving a single numeric argument.
ℹ The array literal notation [] is preferable.
Array(0, 1, 2);code-block.js:1:1 lint/correctness/useArrayLiterals ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Don’t use Array constructors.
> 1 │ Array(0, 1, 2);
│ ^^^^^^^^^^^^^^^
2 │
ℹ Use of the Array constructor is not allowed except creating sparse arrays of a specified size by giving a single numeric argument.
ℹ The array literal notation [] is preferable.
new Array(0, 1, 2);code-block.js:1:1 lint/correctness/useArrayLiterals ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Don’t use Array constructors.
> 1 │ new Array(0, 1, 2);
│ ^^^^^^^^^^^^^^^^^^^
2 │
ℹ Use of the Array constructor is not allowed except creating sparse arrays of a specified size by giving a single numeric argument.
ℹ The array literal notation [] is preferable.
Array(...args);code-block.js:1:1 lint/correctness/useArrayLiterals ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Don’t use Array constructors.
> 1 │ Array(…args);
│ ^^^^^^^^^^^^^^^
2 │
ℹ Use of the Array constructor is not allowed except creating sparse arrays of a specified size by giving a single numeric argument.
ℹ The array literal notation [] is preferable.
Valid
Section titled ValidArray(500);[0, 1, 2];