noSparseArray

Diagnostic Category: lint/suspicious/noSparseArray

JavaScript (and super languages)

Since: v1.0.0

Note

• This rule is recommended by Biome. A diagnostic error will appear when linting your code.
• This rule has an unsafe fix.

Sources:

• Same as: no-sparse-arrays

Disallow sparse arrays

Examples

Section titled Examples

Invalid

Section titled Invalid

[1,,2]

code-block.js:1:1 lint/suspicious/noSparseArray  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This array contains an empty slot.
  
  > 1 │ [1,,2]
      │ ^^^^^^
    2 │ 
  
  ℹ Unsafe fix: Replace hole with undefined
  
    1 │ [1,·undefined,2]
      │    ++++++++++   

Related links

Section titled Related links

• Disable a rule
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