@babel/parser - npm Package Compare versions

Comparing version 7.0.0-beta.49 to 7.0.0-beta.50

package.json

 {
   "name": "@babel/parser",
-  "version": "7.0.0-beta.49",
+  "version": "7.0.0-beta.50",
   "description": "A JavaScript parser",
@@ -26,5 +26,5 @@ "author": "Sebastian McKenzie <[e-mail]>",
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.49",
+    "@babel/helper-fixtures": "7.0.0-beta.50",
     "charcodes": "0.1.0",
-    "unicode-10.0.0": "^0.7.4"
+    "unicode-11.0.0": "^0.7.7"
   },
@@ -31,0 +31,0 @@ "bin": {

README.md

@@ -1,186 +0,19 @@
-<p align="center">
-  <img alt="@babel/parser" src="https://raw.githubusercontent.com/babel/logo/master/babylon.png" width="700">
-</p>
+# @babel/parser
 
-<p align="center">
-  The Babel parser (previously Babylon) is a JavaScript parser used in <a href="https://github.com/babel/babel">Babel</a>.
-</p>
+> A JavaScript parser
 
- - The latest ECMAScript version enabled by default (ES2017).
- - Comment attachment.
- - Support for JSX, Flow, Typescript.
- - Support for experimental language proposals (accepting PRs for anything at least [stage-0](https://github.com/tc39/proposals/blob/master/stage-0-proposals.md)).
+See our website [@babel/parser](https://new.babeljs.io/docs/en/next/babel-parser.html) for more information or the [issues](https://github.com/babel/babel/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3A%22pkg%3A%20babylon%22+is%3Aopen) associated with this package.
 
-## Credits
+## Install
 
-Heavily based on [acorn](https://github.com/marijnh/acorn) and [acorn-jsx](https://github.com/RReverser/acorn-jsx),
-thanks to the awesome work of [@RReverser](https://github.com/RReverser) and [@marijnh](https://github.com/marijnh).
+Using npm:
 
-## API
-
-### `babelParser.parse(code, [options])`
-
-### `babelParser.parseExpression(code, [options])`
-
-`parse()` parses the provided `code` as an entire ECMAScript program, while
-`parseExpression()` tries to parse a single Expression with performance in
-mind. When in doubt, use `.parse()`.
-
-### Options
-
-- **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.
-
-- **allowAwaitOutsideFunction**: By default, `await` use is not allowed
-  outside of an async function. Set this to `true` to accept such
-  code.
-
-- **allowReturnOutsideFunction**: By default, a return statement at
-  the top level raises an error. Set this to `true` to accept such
-  code.
-
-- **allowSuperOutsideMethod**: TODO
-
-- **sourceType**: Indicate the mode the code should be parsed in. Can be
-  one of `"script"`, `"module"`, or `"unambiguous"`. Defaults to `"script"`. `"unambiguous"` will make @babel/parser attempt to _guess_, based on the presence of ES6 `import` or `export` statements. Files with ES6 `import`s and `export`s are considered `"module"` and are otherwise `"script"`.
-
-- **sourceFilename**: Correlate output AST nodes with their source filename.  Useful when generating code and source maps from the ASTs of multiple input files.
-
-- **startLine**: By default, the first line of code parsed is treated as line 1. You can provide a line number to alternatively start with. Useful for integration with other source tools.
-
-- **plugins**: Array containing the plugins that you want to enable.
-
-- **strictMode**: TODO
-
-- **ranges**: Adds a `ranges` property to each node: `[node.start, node.end]`
-
-- **tokens**: Adds all parsed tokens to a `tokens` property on the `File` node
-
-### Output
-
-The Babel parser generates AST according to [Babel AST format][].
-It is based on [ESTree spec][] with the following deviations:
-
-> There is now an `estree` plugin which reverts these deviations
-
-- [Literal][] token is replaced with [StringLiteral][], [NumericLiteral][], [BooleanLiteral][], [NullLiteral][], [RegExpLiteral][]
-- [Property][] token is replaced with [ObjectProperty][] and [ObjectMethod][]
-- [MethodDefinition][] is replaced with [ClassMethod][]
-- [Program][] and [BlockStatement][] contain additional `directives` field with [Directive][] and [DirectiveLiteral][]
-- [ClassMethod][], [ObjectProperty][], and [ObjectMethod][] value property's properties in [FunctionExpression][] is coerced/brought into the main method node.
-
-AST for JSX code is based on [Facebook JSX AST][].
-
-[Babel AST format]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md
-[ESTree spec]: https://github.com/estree/estree
-
-[Literal]: https://github.com/estree/estree/blob/master/es5.md#literal
-[Property]: https://github.com/estree/estree/blob/master/es5.md#property
-[MethodDefinition]: https://github.com/estree/estree/blob/master/es2015.md#methoddefinition
-
-[StringLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#stringliteral
-[NumericLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#numericliteral
-[BooleanLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#booleanliteral
-[NullLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#nullliteral
-[RegExpLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#regexpliteral
-[ObjectProperty]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#objectproperty
-[ObjectMethod]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#objectmethod
-[ClassMethod]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#classmethod
-[Program]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#programs
-[BlockStatement]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#blockstatement
-[Directive]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#directive
-[DirectiveLiteral]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#directiveliteral
-[FunctionExpression]: https://github.com/babel/babel/tree/master/packages/babel-parser/ast/spec.md#functionexpression
-
-[Facebook JSX AST]: https://github.com/facebook/jsx/blob/master/AST.md
-
-### Semver
-
-The Babel Parser follows semver in most situations. The only thing to note is that some spec-compliancy bug fixes may be released under patch versions.
-
-For example: We push a fix to early error on something like [#107](https://github.com/babel/babylon/pull/107) - multiple default exports per file. That would be considered a bug fix even though it would cause a build to fail.
-
-### Example
-
-```javascript
-require("@babel/parser").parse("code", {
-  // parse in strict mode and allow module declarations
-  sourceType: "module",
-
-  plugins: [
-    // enable jsx and flow syntax
-    "jsx",
-    "flow"
-  ]
-});
+```sh
+npm install --save @babel/parser
 ```
 
-### Plugins
+or using yarn:
 
-| Name | Code Example |
-|------|--------------|
-| `estree` ([repo](https://github.com/estree/estree)) | n/a |
-| `jsx` ([repo](https://facebook.github.io/jsx/)) | `<a attr="b">{s}</a>` |
-| `flow` ([repo](https://github.com/facebook/flow)) | `var a: string = "";` |
-| `flowComments` ([docs](https://flow.org/en/docs/types/comments/)) | `/*:: type Foo = {...}; */` |
-| `typescript` ([repo](https://github.com/Microsoft/TypeScript)) | `var a: string = "";` |
-| `doExpressions` | `var a = do { if (true) { 'hi'; } };` |
-| `objectRestSpread` ([proposal](https://github.com/tc39/proposal-object-rest-spread)) | `var a = { b, ...c };` |
-| `decorators` (Stage 2 [proposal](https://github.com/tc39/proposal-decorators)) and `decorators-legacy` (Stage 1) | `@a class A {}` |
-| `classProperties` ([proposal](https://github.com/tc39/proposal-class-public-fields)) | `class A { b = 1; }` |
-| `classPrivateProperties` ([proposal](https://github.com/tc39/proposal-private-fields)) | `class A { #b = 1; }` |
-| `classPrivateMethods` ([proposal](https://github.com/tc39/proposal-private-methods)) | `class A { #c() {} }` |
-| `exportDefaultFrom` ([proposal](https://github.com/leebyron/ecmascript-export-default-from)) | `export v from "mod"` |
-| `exportNamespaceFrom` ([proposal](https://github.com/leebyron/ecmascript-export-ns-from)) | `export * as ns from "mod"` |
-| `asyncGenerators` ([proposal](https://github.com/tc39/proposal-async-iteration)) | `async function*() {}`, `for await (let a of b) {}` |
-| `functionBind` ([proposal](https://github.com/zenparsing/es-function-bind)) | `a::b`, `::console.log` |
-| `functionSent` | `function.sent` |
-| `dynamicImport` ([proposal](https://github.com/tc39/proposal-dynamic-import)) | `import('./guy').then(a)` |
-| `numericSeparator` ([proposal](https://github.com/samuelgoto/proposal-numeric-separator)) | `1_000_000` |
-| `optionalChaining` ([proposal](https://github.com/tc39/proposal-optional-chaining)) | `a?.b` |
-| `importMeta` ([proposal](https://github.com/tc39/proposal-import-meta)) | `import.meta.url` |
-| `bigInt` ([proposal](https://github.com/tc39/proposal-bigint)) | `100n` |
-| `optionalCatchBinding` ([proposal](https://github.com/babel/proposals/issues/7)) | `try {throw 0;} catch{do();}` |
-| `throwExpressions` ([proposal](https://github.com/babel/proposals/issues/23)) | `() => throw new Error("")` |
-| `pipelineOperator` ([proposal](https://github.com/babel/proposals/issues/29)) | `a \|> b` |
-| `nullishCoalescingOperator` ([proposal](https://github.com/babel/proposals/issues/14)) | `a ?? b` |
-
-
-#### Plugins options
-
-> NOTE: When a plugin is specified multiple times, only the first options are considered.
-
-- `decorators`:
-  - `decoratorsBeforeExport` (`boolean`)
-    ```js
-    // decoratorsBeforeExport: true
-    @dec
-    export class C {}
-
-    // decoratorsBeforeExport: false
-    export @dec class C {}
-    ```
-- `flow`:
-  - `all` (`boolean`)
-    <!-- TODO -->
-
-### FAQ
-
-#### Will the Babel parser support a plugin system?
-
-Previous issues: [#1351](https://github.com/babel/babel/issues/1351), [#6694](https://github.com/babel/babel/issues/6694).
-
-We currently aren't willing to commit to supporting the API for plugins or the resulting ecosystem (there is already enough work maintaining Babel's own plugin system). It's not clear how to make that API effective, and it would limit our ability to refactor and optimize the codebase.
-
-Our current recommendation for those that want to create their own custom syntax is for users to fork the parser.
-
-To consume your custom parser, you can add to your `.babelrc` via its npm package name or require it if using JavaScript,
-
-```json
-{
-  "parserOpts": {
-    "parser": "custom-fork-of-babel-parser-on-npm-here"
-  }
-}
+```sh
+yarn add --save @babel/parser
 ```

Fixed alerts

New author

Supply chain risk

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

Found 1 instance in 1 package

Improved metrics

Lines of code

8435

increased by0.32%

Number of medium supply chain risk alerts

0

decreased by-100%

Worsened metrics

Total package byte prevSize

372331

decreased by-2.16%

Number of lines in readme file

20

decreased by-89.3%

No dependency changes