---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: invalid.js
---
# Input
```jsx
// `object`
const foo = {then: 1}
const foo = {["then"]: 1}
const foo = {[`then`]: 1}
const foo = {["then"]() {}}
const foo = {[`then`]() {}}
const foo = {get then() {}}
const foo = {get ["then"]() {}}
const foo = {get [`then`]() {}}

// `class`
class Foo {then}
const Foo = class {then}
class Foo {["then"]}
class Foo {[`then`]}
class Foo {then() {}}
class Foo {["then"]() {}}
class Foo {[`then`]() {}}
class Foo {static then}
class Foo {static ["then"]}
class Foo {static [`then`]}
class Foo {static then() {}}
class Foo {static ["then"]() {}}
class Foo {static [`then`]() {}}
class Foo {get then() {}}
class Foo {get ["then"]() {}}
class Foo {get [`then`]() {}}
class Foo {set then(v) {}}
class Foo {set ["then"](v) {}}
class Foo {set [`then`](v) {}}
class Foo {static get then() {}}
class Foo {static get ["then"]() {}}
class Foo {static get [`then`]() {}}

// Assign
foo.then = 1
foo["then"] = 1
foo[`then`] = 1
foo.then += 1
foo.then ||= 1
foo.then ??= 1

// `{Object,Reflect}.defineProperty`
Object.defineProperty(foo, "then", 1)
Object.defineProperty(foo, `then`, 1)
Reflect.defineProperty(foo, "then", 1)
Reflect.defineProperty(foo, `then`, 1)

// `Object.fromEntries`
Object.fromEntries([["then", 1]])
Object.fromEntries([["then"]])
Object.fromEntries([[`then`, 1]])
Object.fromEntries([foo, ["then", 1]])

// `export`
const then = 1; export {then}
const notThen = 1; export {notThen as then}

// `export variables`
export const then = 1
```

# Diagnostics
```
invalid.js:2:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    1 │ // `object`
  > 2 │ const foo = {then: 1}
      │              ^^^^
    3 │ const foo = {["then"]: 1}
    4 │ const foo = {[`then`]: 1}
  

```

```
invalid.js:3:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    1 │ // `object`
    2 │ const foo = {then: 1}
  > 3 │ const foo = {["then"]: 1}
      │              ^^^^^^^^
    4 │ const foo = {[`then`]: 1}
    5 │ const foo = {["then"]() {}}
  

```

```
invalid.js:3:15 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    1 │ // `object`
    2 │ const foo = {then: 1}
  > 3 │ const foo = {["then"]: 1}
      │               ^^^^^^
    4 │ const foo = {[`then`]: 1}
    5 │ const foo = {["then"]() {}}
  

```

```
invalid.js:4:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    2 │ const foo = {then: 1}
    3 │ const foo = {["then"]: 1}
  > 4 │ const foo = {[`then`]: 1}
      │              ^^^^^^^^
    5 │ const foo = {["then"]() {}}
    6 │ const foo = {[`then`]() {}}
  

```

```
invalid.js:4:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    2 │ const foo = {then: 1}
    3 │ const foo = {["then"]: 1}
  > 4 │ const foo = {[`then`]: 1}
      │                ^^^^
    5 │ const foo = {["then"]() {}}
    6 │ const foo = {[`then`]() {}}
  

```

```
invalid.js:5:15 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    3 │ const foo = {["then"]: 1}
    4 │ const foo = {[`then`]: 1}
  > 5 │ const foo = {["then"]() {}}
      │               ^^^^^^
    6 │ const foo = {[`then`]() {}}
    7 │ const foo = {get then() {}}
  

```

```
invalid.js:6:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    4 │ const foo = {[`then`]: 1}
    5 │ const foo = {["then"]() {}}
  > 6 │ const foo = {[`then`]() {}}
      │              ^^^^^^^^
    7 │ const foo = {get then() {}}
    8 │ const foo = {get ["then"]() {}}
  

```

```
invalid.js:6:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    4 │ const foo = {[`then`]: 1}
    5 │ const foo = {["then"]() {}}
  > 6 │ const foo = {[`then`]() {}}
      │                ^^^^
    7 │ const foo = {get then() {}}
    8 │ const foo = {get ["then"]() {}}
  

```

```
invalid.js:7:18 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    5 │ const foo = {["then"]() {}}
    6 │ const foo = {[`then`]() {}}
  > 7 │ const foo = {get then() {}}
      │                  ^^^^
    8 │ const foo = {get ["then"]() {}}
    9 │ const foo = {get [`then`]() {}}
  

```

```
invalid.js:8:18 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
     6 │ const foo = {[`then`]() {}}
     7 │ const foo = {get then() {}}
   > 8 │ const foo = {get ["then"]() {}}
       │                  ^^^^^^^^
     9 │ const foo = {get [`then`]() {}}
    10 │ 
  

```

```
invalid.js:8:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
     6 │ const foo = {[`then`]() {}}
     7 │ const foo = {get then() {}}
   > 8 │ const foo = {get ["then"]() {}}
       │                   ^^^^^^
     9 │ const foo = {get [`then`]() {}}
    10 │ 
  

```

```
invalid.js:9:18 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
     7 │ const foo = {get then() {}}
     8 │ const foo = {get ["then"]() {}}
   > 9 │ const foo = {get [`then`]() {}}
       │                  ^^^^^^^^
    10 │ 
    11 │ // `class`
  

```

```
invalid.js:9:20 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
     7 │ const foo = {get then() {}}
     8 │ const foo = {get ["then"]() {}}
   > 9 │ const foo = {get [`then`]() {}}
       │                    ^^^^
    10 │ 
    11 │ // `class`
  

```

```
invalid.js:12:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    11 │ // `class`
  > 12 │ class Foo {then}
       │            ^^^^
    13 │ const Foo = class {then}
    14 │ class Foo {["then"]}
  

```

```
invalid.js:13:20 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    11 │ // `class`
    12 │ class Foo {then}
  > 13 │ const Foo = class {then}
       │                    ^^^^
    14 │ class Foo {["then"]}
    15 │ class Foo {[`then`]}
  

```

```
invalid.js:14:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    12 │ class Foo {then}
    13 │ const Foo = class {then}
  > 14 │ class Foo {["then"]}
       │            ^^^^^^^^
    15 │ class Foo {[`then`]}
    16 │ class Foo {then() {}}
  

```

```
invalid.js:14:13 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    12 │ class Foo {then}
    13 │ const Foo = class {then}
  > 14 │ class Foo {["then"]}
       │             ^^^^^^
    15 │ class Foo {[`then`]}
    16 │ class Foo {then() {}}
  

```

```
invalid.js:15:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    13 │ const Foo = class {then}
    14 │ class Foo {["then"]}
  > 15 │ class Foo {[`then`]}
       │            ^^^^^^^^
    16 │ class Foo {then() {}}
    17 │ class Foo {["then"]() {}}
  

```

```
invalid.js:15:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    13 │ const Foo = class {then}
    14 │ class Foo {["then"]}
  > 15 │ class Foo {[`then`]}
       │              ^^^^
    16 │ class Foo {then() {}}
    17 │ class Foo {["then"]() {}}
  

```

```
invalid.js:16:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    14 │ class Foo {["then"]}
    15 │ class Foo {[`then`]}
  > 16 │ class Foo {then() {}}
       │            ^^^^
    17 │ class Foo {["then"]() {}}
    18 │ class Foo {[`then`]() {}}
  

```

```
invalid.js:17:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    15 │ class Foo {[`then`]}
    16 │ class Foo {then() {}}
  > 17 │ class Foo {["then"]() {}}
       │            ^^^^^^^^
    18 │ class Foo {[`then`]() {}}
    19 │ class Foo {static then}
  

```

```
invalid.js:17:13 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    15 │ class Foo {[`then`]}
    16 │ class Foo {then() {}}
  > 17 │ class Foo {["then"]() {}}
       │             ^^^^^^
    18 │ class Foo {[`then`]() {}}
    19 │ class Foo {static then}
  

```

```
invalid.js:18:12 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    16 │ class Foo {then() {}}
    17 │ class Foo {["then"]() {}}
  > 18 │ class Foo {[`then`]() {}}
       │            ^^^^^^^^
    19 │ class Foo {static then}
    20 │ class Foo {static ["then"]}
  

```

```
invalid.js:18:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    16 │ class Foo {then() {}}
    17 │ class Foo {["then"]() {}}
  > 18 │ class Foo {[`then`]() {}}
       │              ^^^^
    19 │ class Foo {static then}
    20 │ class Foo {static ["then"]}
  

```

```
invalid.js:19:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    17 │ class Foo {["then"]() {}}
    18 │ class Foo {[`then`]() {}}
  > 19 │ class Foo {static then}
       │                   ^^^^
    20 │ class Foo {static ["then"]}
    21 │ class Foo {static [`then`]}
  

```

```
invalid.js:20:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    18 │ class Foo {[`then`]() {}}
    19 │ class Foo {static then}
  > 20 │ class Foo {static ["then"]}
       │                   ^^^^^^^^
    21 │ class Foo {static [`then`]}
    22 │ class Foo {static then() {}}
  

```

```
invalid.js:20:20 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    18 │ class Foo {[`then`]() {}}
    19 │ class Foo {static then}
  > 20 │ class Foo {static ["then"]}
       │                    ^^^^^^
    21 │ class Foo {static [`then`]}
    22 │ class Foo {static then() {}}
  

```

```
invalid.js:21:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    19 │ class Foo {static then}
    20 │ class Foo {static ["then"]}
  > 21 │ class Foo {static [`then`]}
       │                   ^^^^^^^^
    22 │ class Foo {static then() {}}
    23 │ class Foo {static ["then"]() {}}
  

```

```
invalid.js:21:21 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    19 │ class Foo {static then}
    20 │ class Foo {static ["then"]}
  > 21 │ class Foo {static [`then`]}
       │                     ^^^^
    22 │ class Foo {static then() {}}
    23 │ class Foo {static ["then"]() {}}
  

```

```
invalid.js:22:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    20 │ class Foo {static ["then"]}
    21 │ class Foo {static [`then`]}
  > 22 │ class Foo {static then() {}}
       │                   ^^^^
    23 │ class Foo {static ["then"]() {}}
    24 │ class Foo {static [`then`]() {}}
  

```

```
invalid.js:23:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    21 │ class Foo {static [`then`]}
    22 │ class Foo {static then() {}}
  > 23 │ class Foo {static ["then"]() {}}
       │                   ^^^^^^^^
    24 │ class Foo {static [`then`]() {}}
    25 │ class Foo {get then() {}}
  

```

```
invalid.js:23:20 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    21 │ class Foo {static [`then`]}
    22 │ class Foo {static then() {}}
  > 23 │ class Foo {static ["then"]() {}}
       │                    ^^^^^^
    24 │ class Foo {static [`then`]() {}}
    25 │ class Foo {get then() {}}
  

```

```
invalid.js:24:19 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    22 │ class Foo {static then() {}}
    23 │ class Foo {static ["then"]() {}}
  > 24 │ class Foo {static [`then`]() {}}
       │                   ^^^^^^^^
    25 │ class Foo {get then() {}}
    26 │ class Foo {get ["then"]() {}}
  

```

```
invalid.js:24:21 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    22 │ class Foo {static then() {}}
    23 │ class Foo {static ["then"]() {}}
  > 24 │ class Foo {static [`then`]() {}}
       │                     ^^^^
    25 │ class Foo {get then() {}}
    26 │ class Foo {get ["then"]() {}}
  

```

```
invalid.js:25:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    23 │ class Foo {static ["then"]() {}}
    24 │ class Foo {static [`then`]() {}}
  > 25 │ class Foo {get then() {}}
       │                ^^^^
    26 │ class Foo {get ["then"]() {}}
    27 │ class Foo {get [`then`]() {}}
  

```

```
invalid.js:26:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    24 │ class Foo {static [`then`]() {}}
    25 │ class Foo {get then() {}}
  > 26 │ class Foo {get ["then"]() {}}
       │                ^^^^^^^^
    27 │ class Foo {get [`then`]() {}}
    28 │ class Foo {set then(v) {}}
  

```

```
invalid.js:26:17 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    24 │ class Foo {static [`then`]() {}}
    25 │ class Foo {get then() {}}
  > 26 │ class Foo {get ["then"]() {}}
       │                 ^^^^^^
    27 │ class Foo {get [`then`]() {}}
    28 │ class Foo {set then(v) {}}
  

```

```
invalid.js:27:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    25 │ class Foo {get then() {}}
    26 │ class Foo {get ["then"]() {}}
  > 27 │ class Foo {get [`then`]() {}}
       │                ^^^^^^^^
    28 │ class Foo {set then(v) {}}
    29 │ class Foo {set ["then"](v) {}}
  

```

```
invalid.js:27:18 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    25 │ class Foo {get then() {}}
    26 │ class Foo {get ["then"]() {}}
  > 27 │ class Foo {get [`then`]() {}}
       │                  ^^^^
    28 │ class Foo {set then(v) {}}
    29 │ class Foo {set ["then"](v) {}}
  

```

```
invalid.js:28:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    26 │ class Foo {get ["then"]() {}}
    27 │ class Foo {get [`then`]() {}}
  > 28 │ class Foo {set then(v) {}}
       │                ^^^^
    29 │ class Foo {set ["then"](v) {}}
    30 │ class Foo {set [`then`](v) {}}
  

```

```
invalid.js:29:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    27 │ class Foo {get [`then`]() {}}
    28 │ class Foo {set then(v) {}}
  > 29 │ class Foo {set ["then"](v) {}}
       │                ^^^^^^^^
    30 │ class Foo {set [`then`](v) {}}
    31 │ class Foo {static get then() {}}
  

```

```
invalid.js:29:17 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    27 │ class Foo {get [`then`]() {}}
    28 │ class Foo {set then(v) {}}
  > 29 │ class Foo {set ["then"](v) {}}
       │                 ^^^^^^
    30 │ class Foo {set [`then`](v) {}}
    31 │ class Foo {static get then() {}}
  

```

```
invalid.js:30:16 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    28 │ class Foo {set then(v) {}}
    29 │ class Foo {set ["then"](v) {}}
  > 30 │ class Foo {set [`then`](v) {}}
       │                ^^^^^^^^
    31 │ class Foo {static get then() {}}
    32 │ class Foo {static get ["then"]() {}}
  

```

```
invalid.js:30:18 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    28 │ class Foo {set then(v) {}}
    29 │ class Foo {set ["then"](v) {}}
  > 30 │ class Foo {set [`then`](v) {}}
       │                  ^^^^
    31 │ class Foo {static get then() {}}
    32 │ class Foo {static get ["then"]() {}}
  

```

```
invalid.js:31:23 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    29 │ class Foo {set ["then"](v) {}}
    30 │ class Foo {set [`then`](v) {}}
  > 31 │ class Foo {static get then() {}}
       │                       ^^^^
    32 │ class Foo {static get ["then"]() {}}
    33 │ class Foo {static get [`then`]() {}}
  

```

```
invalid.js:32:23 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    30 │ class Foo {set [`then`](v) {}}
    31 │ class Foo {static get then() {}}
  > 32 │ class Foo {static get ["then"]() {}}
       │                       ^^^^^^^^
    33 │ class Foo {static get [`then`]() {}}
    34 │ 
  

```

```
invalid.js:32:24 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    30 │ class Foo {set [`then`](v) {}}
    31 │ class Foo {static get then() {}}
  > 32 │ class Foo {static get ["then"]() {}}
       │                        ^^^^^^
    33 │ class Foo {static get [`then`]() {}}
    34 │ 
  

```

```
invalid.js:33:23 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to a class.
  
    31 │ class Foo {static get then() {}}
    32 │ class Foo {static get ["then"]() {}}
  > 33 │ class Foo {static get [`then`]() {}}
       │                       ^^^^^^^^
    34 │ 
    35 │ // Assign
  

```

```
invalid.js:33:25 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    31 │ class Foo {static get then() {}}
    32 │ class Foo {static get ["then"]() {}}
  > 33 │ class Foo {static get [`then`]() {}}
       │                         ^^^^
    34 │ 
    35 │ // Assign
  

```

```
invalid.js:36:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    35 │ // Assign
  > 36 │ foo.then = 1
       │ ^^^^^^^^
    37 │ foo["then"] = 1
    38 │ foo[`then`] = 1
  

```

```
invalid.js:37:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    35 │ // Assign
    36 │ foo.then = 1
  > 37 │ foo["then"] = 1
       │ ^^^^^^^^^^^
    38 │ foo[`then`] = 1
    39 │ foo.then += 1
  

```

```
invalid.js:38:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    36 │ foo.then = 1
    37 │ foo["then"] = 1
  > 38 │ foo[`then`] = 1
       │ ^^^^^^^^^^^
    39 │ foo.then += 1
    40 │ foo.then ||= 1
  

```

```
invalid.js:39:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    37 │ foo["then"] = 1
    38 │ foo[`then`] = 1
  > 39 │ foo.then += 1
       │ ^^^^^^^^
    40 │ foo.then ||= 1
    41 │ foo.then ??= 1
  

```

```
invalid.js:40:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    38 │ foo[`then`] = 1
    39 │ foo.then += 1
  > 40 │ foo.then ||= 1
       │ ^^^^^^^^
    41 │ foo.then ??= 1
    42 │ 
  

```

```
invalid.js:41:1 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    39 │ foo.then += 1
    40 │ foo.then ||= 1
  > 41 │ foo.then ??= 1
       │ ^^^^^^^^
    42 │ 
    43 │ // `{Object,Reflect}.defineProperty`
  

```

```
invalid.js:44:28 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    43 │ // `{Object,Reflect}.defineProperty`
  > 44 │ Object.defineProperty(foo, "then", 1)
       │                            ^^^^^^
    45 │ Object.defineProperty(foo, `then`, 1)
    46 │ Reflect.defineProperty(foo, "then", 1)
  

```

```
invalid.js:45:28 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    43 │ // `{Object,Reflect}.defineProperty`
    44 │ Object.defineProperty(foo, "then", 1)
  > 45 │ Object.defineProperty(foo, `then`, 1)
       │                            ^^^^^^
    46 │ Reflect.defineProperty(foo, "then", 1)
    47 │ Reflect.defineProperty(foo, `then`, 1)
  

```

```
invalid.js:46:29 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    44 │ Object.defineProperty(foo, "then", 1)
    45 │ Object.defineProperty(foo, `then`, 1)
  > 46 │ Reflect.defineProperty(foo, "then", 1)
       │                             ^^^^^^
    47 │ Reflect.defineProperty(foo, `then`, 1)
    48 │ 
  

```

```
invalid.js:47:29 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    45 │ Object.defineProperty(foo, `then`, 1)
    46 │ Reflect.defineProperty(foo, "then", 1)
  > 47 │ Reflect.defineProperty(foo, `then`, 1)
       │                             ^^^^^^
    48 │ 
    49 │ // `Object.fromEntries`
  

```

```
invalid.js:50:22 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    49 │ // `Object.fromEntries`
  > 50 │ Object.fromEntries([["then", 1]])
       │                      ^^^^^^
    51 │ Object.fromEntries([["then"]])
    52 │ Object.fromEntries([[`then`, 1]])
  

```

```
invalid.js:51:22 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    49 │ // `Object.fromEntries`
    50 │ Object.fromEntries([["then", 1]])
  > 51 │ Object.fromEntries([["then"]])
       │                      ^^^^^^
    52 │ Object.fromEntries([[`then`, 1]])
    53 │ Object.fromEntries([foo, ["then", 1]])
  

```

```
invalid.js:52:22 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    50 │ Object.fromEntries([["then", 1]])
    51 │ Object.fromEntries([["then"]])
  > 52 │ Object.fromEntries([[`then`, 1]])
       │                      ^^^^^^
    53 │ Object.fromEntries([foo, ["then", 1]])
    54 │ 
  

```

```
invalid.js:53:27 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    51 │ Object.fromEntries([["then"]])
    52 │ Object.fromEntries([[`then`, 1]])
  > 53 │ Object.fromEntries([foo, ["then", 1]])
       │                           ^^^^^^
    54 │ 
    55 │ // `export`
  

```

```
invalid.js:56:25 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not export then.
  
    55 │ // `export`
  > 56 │ const then = 1; export {then}
       │                         ^^^^
    57 │ const notThen = 1; export {notThen as then}
    58 │ 
  

```

```
invalid.js:57:39 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not export then.
  
    55 │ // `export`
    56 │ const then = 1; export {then}
  > 57 │ const notThen = 1; export {notThen as then}
       │                                       ^^^^
    58 │ 
    59 │ // `export variables`
  

```

```
invalid.js:60:14 lint/suspicious/noThenProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Do not add then to an object.
  
    59 │ // `export variables`
  > 60 │ export const then = 1
       │              ^^^^
  

```