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update node modules
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37
node_modules/acorn/README.md
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37
node_modules/acorn/README.md
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@@ -32,14 +32,14 @@ npm install
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## Interface
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**parse**`(input, options)` is the main interface to the library. The
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`input` parameter is a string, `options` can be undefined or an object
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setting some of the options listed below. The return value will be an
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abstract syntax tree object as specified by the [ESTree
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`input` parameter is a string, `options` must be an object setting
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some of the options listed below. The return value will be an abstract
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syntax tree object as specified by the [ESTree
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spec](https://github.com/estree/estree).
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```javascript
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let acorn = require("acorn");
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console.log(acorn.parse("1 + 1"));
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console.log(acorn.parse("1 + 1", {ecmaVersion: 2020}));
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```
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When encountering a syntax error, the parser will raise a
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@@ -48,18 +48,19 @@ have a `pos` property that indicates the string offset at which the
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error occurred, and a `loc` object that contains a `{line, column}`
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object referring to that same position.
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Options can be provided by passing a second argument, which should be
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an object containing any of these fields:
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Options are provided by in a second argument, which should be an
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object containing any of these fields (only `ecmaVersion` is
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required):
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- **ecmaVersion**: Indicates the ECMAScript version to parse. Must be
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either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018), 10 (2019) or 11
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(2020, partial support). This influences support for strict mode,
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the set of reserved words, and support for new syntax features.
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Default is 10.
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either 3, 5, 6 (or 2015), 7 (2016), 8 (2017), 9 (2018), 10 (2019),
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11 (2020), or 12 (2021, partial support), or `"latest"` (the latest
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the library supports). This influences support for strict mode, the
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set of reserved words, and support for new syntax features.
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**NOTE**: Only 'stage 4' (finalized) ECMAScript features are being
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implemented by Acorn. Other proposed new features can be implemented
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through plugins.
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implemented by Acorn. Other proposed new features must be
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implemented through plugins.
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- **sourceType**: Indicate the mode the code should be parsed in. Can be
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either `"script"` or `"module"`. This influences global strict mode
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@@ -89,8 +90,10 @@ an object containing any of these fields:
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- **allowImportExportEverywhere**: By default, `import` and `export`
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declarations can only appear at a program's top level. Setting this
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option to `true` allows them anywhere where a statement is allowed.
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option to `true` allows them anywhere where a statement is allowed,
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and also allows `import.meta` expressions to appear in scripts
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(when `sourceType` is not `"module"`).
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- **allowAwaitOutsideFunction**: By default, `await` expressions can
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only appear inside `async` functions. Setting this option to
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`true` allows to have top-level `await` expressions. They are
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@@ -224,7 +227,7 @@ you can use its static `extend` method.
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var acorn = require("acorn");
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var jsx = require("acorn-jsx");
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var JSXParser = acorn.Parser.extend(jsx());
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JSXParser.parse("foo(<bar/>)");
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JSXParser.parse("foo(<bar/>)", {ecmaVersion: 2020});
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```
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The `extend` method takes any number of plugin values, and returns a
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@@ -249,6 +252,9 @@ options:
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- `--allow-hash-bang`: If the code starts with the characters #! (as
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in a shellscript), the first line will be treated as a comment.
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- `--allow-await-outside-function`: Allows top-level `await` expressions.
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See the `allowAwaitOutsideFunction` option for more information.
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- `--compact`: No whitespace is used in the AST output.
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- `--silent`: Do not output the AST, just return the exit status.
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@@ -266,5 +272,4 @@ Plugins for ECMAScript proposals:
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- [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling:
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- [`acorn-class-fields`](https://github.com/acornjs/acorn-class-fields): Parse [class fields proposal](https://github.com/tc39/proposal-class-fields)
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- [`acorn-import-meta`](https://github.com/acornjs/acorn-import-meta): Parse [import.meta proposal](https://github.com/tc39/proposal-import-meta)
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- [`acorn-numeric-separator`](https://github.com/acornjs/acorn-numeric-separator): Parse [numeric separator proposal](https://github.com/tc39/proposal-numeric-separator)
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- [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods)n
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