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Add locations for parser #3186

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locations
liuxingbaoyu Mar 7, 2026
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liuxingbaoyu May 31, 2026
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35 changes: 35 additions & 0 deletions docs/parser.md
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Expand Up @@ -29,11 +29,14 @@ mind. When in doubt, use `.parse()`.

### Options

:::babel8

<details>
<summary>History</summary>

| Version | Changes |
| --------- | -------------------------------------------------- |
| `v8.0.0` | Added `locations` |
| `v7.28.0` | Added `sourceType: "commonjs"` |
| `v7.27.0` | Added `allowYieldOutsideFunction` |
| `v7.26.0` | Added `startIndex` |
Expand All @@ -47,6 +50,30 @@ mind. When in doubt, use `.parse()`.

</details>

:::

:::babel7

<details>
<summary>History</summary>

| Version | Changes |
| --------- | -------------------------------------------------- |
| `v7.28.0` | Added `sourceType: "commonjs"` |
| `v7.27.0` | Added `allowYieldOutsideFunction` |
| `v7.26.0` | Added `startIndex` |
| `v7.23.0` | Added `createImportExpressions` |
| `v7.21.0` | Added `allowNewTargetOutsideFunction` and `annexB` |
| `v7.16.0` | Added `startColumn` |
| `v7.15.0` | Added `attachComment` |
| `v7.7.0` | Added `errorRecovery` |
| `v7.5.0` | Added `allowUndeclaredExports` |
| `v7.2.0` | Added `createParenthesizedExpressions` |

</details>

:::

- **allowImportExportEverywhere**: By default, `import` and `export`
declarations can only appear at a program's top level. Setting this
option to `true` allows them anywhere where a statement is allowed.
Expand Down Expand Up @@ -94,6 +121,14 @@ mind. When in doubt, use `.parse()`.
The resulting AST will have an `errors` property representing an array of all the parsing errors.
Note that even when this option is enabled, `@babel/parser` could throw for unrecoverable errors.

:::babel8

- **locations**: Can be one of `true`, `false` or `packed`.
`true` is the default and will add a `loc` property to each node, which is an object with `start` and `end` properties, which are objects containing `line` and `column` numbers.
When set to `false`, the "loc" property will not be included in the output AST.

:::

- **plugins**: Array containing the plugins that you want to enable.

- **sourceType**: Indicate the mode the code should be parsed in. Can be
Expand Down