---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.jsonc
---
# Input
```cjs
({ a: 1, a: 2 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, a: 2 });
      │    ^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ a: 1, a: 2 });
      │          ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·a:·2·});
      │       ------     

```

# Input
```cjs
({ a: 1, a: 2, a: 3 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, a: 2, a: 3 });
      │    ^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ a: 1, a: 2, a: 3 });
      │                ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·a:·2,·a:·3·});
      │       ------           

```

```
invalid.jsonc:1:10 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, a: 2, a: 3 });
      │          ^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ a: 1, a: 2, a: 3 });
      │                ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·a:·2,·a:·3·});
      │             ------     

```

# Input
```cjs
({ '': 1, '': 2 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named  is later overwritten by an object member with the same name.
  
  > 1 │ ({ '': 1, '': 2 });
      │    ^^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ '': 1, '': 2 });
      │           ^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named 
  
    1 │ ({·'':·1,·'':·2·});
      │        -------     

```

# Input
```cjs
({ z: 1, z: 2 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named z is later overwritten by an object member with the same name.
  
  > 1 │ ({ z: 1, z: 2 });
      │    ^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ z: 1, z: 2 });
      │          ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named z
  
    1 │ ({·z:·1,·z:·2·});
      │       ------     

```

# Input
```cjs
({ get a() {}, get a() {} });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This getter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ get a() {}, get a() {} });
      │    ^^^^^^^^^^
  
  i Overwritten with this getter.
  
  > 1 │ ({ get a() {}, get a() {} });
      │                ^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this getter named a
  
    1 │ ({·get·a()·{},·get·a()·{}·});
      │              ------------    

```

# Input
```cjs
({ set a(v) {}, set a(v) {} });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This setter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ set a(v) {}, set a(v) {} });
      │    ^^^^^^^^^^^
  
  i Overwritten with this setter.
  
  > 1 │ ({ set a(v) {}, set a(v) {} });
      │                 ^^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this setter named a
  
    1 │ ({·set·a(v)·{},·set·a(v)·{}·});
      │               -------------    

```

# Input
```cjs
({ a: 1, get a() {} });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, get a() {} });
      │    ^^^^
  
  i Overwritten with this getter.
  
  > 1 │ ({ a: 1, get a() {} });
      │          ^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·get·a()·{}·});
      │    ------              

```

# Input
```cjs
({ a: 1, set a(v) {} });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, set a(v) {} });
      │    ^^^^
  
  i Overwritten with this setter.
  
  > 1 │ ({ a: 1, set a(v) {} });
      │          ^^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·set·a(v)·{}·});
      │    ------               

```

# Input
```cjs
({ get a() {}, a: 1 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This getter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ get a() {}, a: 1 });
      │    ^^^^^^^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ get a() {}, a: 1 });
      │                ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this getter named a
  
    1 │ ({·get·a()·{},·a:·1·});
      │    ------------        

```

# Input
```cjs
({ set a(v) {}, a: 1 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This setter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ set a(v) {}, a: 1 });
      │    ^^^^^^^^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ set a(v) {}, a: 1 });
      │                 ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this setter named a
  
    1 │ ({·set·a(v)·{},·a:·1·});
      │    -------------        

```

# Input
```cjs
({ a: 1, get a() {}, set a(v) {} });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ a: 1, get a() {}, set a(v) {} });
      │    ^^^^
  
  i Overwritten with this setter.
  
  > 1 │ ({ a: 1, get a() {}, set a(v) {} });
      │                      ^^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·a:·1,·get·a()·{},·set·a(v)·{}·});
      │    ------                           

```

# Input
```cjs
({ get a() {}, a: 1, set a(v) {} });
```

# Diagnostics
```
invalid.jsonc:1:16 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This property value named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ get a() {}, a: 1, set a(v) {} });
      │                ^^^^
  
  i Overwritten with this setter.
  
  > 1 │ ({ get a() {}, a: 1, set a(v) {} });
      │                      ^^^^^^^^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this property value named a
  
    1 │ ({·get·a()·{},·a:·1,·set·a(v)·{}·});
      │                ------               

```

# Input
```cjs
({ get a() {}, set a(v) {}, a: 1 });
```

# Diagnostics
```
invalid.jsonc:1:4 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This getter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ get a() {}, set a(v) {}, a: 1 });
      │    ^^^^^^^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ get a() {}, set a(v) {}, a: 1 });
      │                             ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this getter named a
  
    1 │ ({·get·a()·{},·set·a(v)·{},·a:·1·});
      │    ------------                     

```

```
invalid.jsonc:1:16 lint/suspicious/noDuplicateObjectKeys  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! This setter named a is later overwritten by an object member with the same name.
  
  > 1 │ ({ get a() {}, set a(v) {}, a: 1 });
      │                ^^^^^^^^^^^
  
  i Overwritten with this value.
  
  > 1 │ ({ get a() {}, set a(v) {}, a: 1 });
      │                             ^^^^
  
  i If an object property with the same name is defined multiple times (except when combining a getter with a setter), only the last definition makes it into the object and previous definitions are ignored.
  
  i Unsafe fix: Remove this setter named a
  
    1 │ ({·get·a()·{},·set·a(v)·{},·a:·1·});
      │                -------------        

```