Skip to content
Biome
Docs Blog Playground

noEmptyPattern (since v1.0.0)

Diagnostic Category: lint/correctness/noEmptyPattern

Sources:

Disallows empty destructuring patterns.

Examples

Section titled Examples

Invalid

Section titled Invalid
var {} = foo;
correctness/noEmptyPattern.js:1:5 lint/correctness/noEmptyPattern ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected empty object pattern.
  
  > 1 │ var {} = foo;
      │     ^^
    2 │ 
  

var {a: {}} = foo;
correctness/noEmptyPattern.js:1:9 lint/correctness/noEmptyPattern ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected empty object pattern.
  
  > 1 │ var {a: {}} = foo;
      │         ^^
    2 │ 
  

function foo({}) {}
correctness/noEmptyPattern.js:1:14 lint/correctness/noEmptyPattern ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected empty object pattern.
  
  > 1 │ function foo({}) {}
      │              ^^
    2 │

Valid

Section titled Valid

The following cases are valid because they create new bindings.

var {a = {}} = foo;
var {a, b = {}} = foo;
var {a = []} = foo;
function foo({a = {}}) {}
function foo({a = []}) {}
var [a] = foo;
Section titled Related links