🐠 Babel is a compiler for writing next generation JavaScript.
Installations
npm install babel-coreDeveloper Guide
BETA
Typescript
No
Module System
N/A
Node Version
9.4.0
NPM Version
5.6.0
Score
94
Supply Chain
96.7
Quality
77.4
Maintenance
25
Vulnerability
99.6
License
Releases
428
Contributors
1,108
Languages
6
TypeScript
JavaScript
Shell
Makefile
HTML
Batchfile
TypeScript (68.96%)
JavaScript (30.3%)
Shell (0.6%)
Makefile (0.09%)
HTML (0.06%)
validate.email 🚀
Verify real, reachable, and deliverable emails with instant MX records, SMTP checks, and disposable email detection.
Developer
Download Statistics
Total Downloads
2,410,147,032
Last Day
1,370,286
Last Week
6,990,133
Last Month
30,168,307
Last Year
401,786,254
GitHub Statistics
MIT License
43,446 Stars
16,828 Commits
5,681 Forks
804 Watchers
16 Branches
1,108 Contributors
Updated on Mar 14, 2025
Bundle Size
536.67 kB
Minified
145.05 kB
Minified + Gzipped
Maintainers
4
Package Meta Information
Latest Version
6.26.3
Package Id
babel-core@6.26.3
Size
23.21 kB
NPM Version
5.6.0
Node Version
9.4.0
Published on
Apr 27, 2018
Total Downloads
Cumulative downloads
Total Downloads
2,410,147,032
Last Day
6.3%
1,370,286
Compared to previous day
Last Week
1.6%
6,990,133
Compared to previous week
Last Month
0.1%
30,168,307
Compared to previous month
Last Year
10.4%
401,786,254
Compared to previous year
Daily Downloads
Weekly Downloads
Monthly Downloads
Yearly Downloads
Dependencies
19
babel-core
Babel compiler core.
1var babel = require("babel-core"); 2import { transform } from 'babel-core'; 3import * as babel from 'babel-core';
All transformations will use your local configuration files (.babelrc or in package.json). See options to disable it.
babel.transform(code: string, options?: Object)
Transforms the passed in code. Returning an object with the generated code,
source map, and AST.
1babel.transform(code, options) // => { code, map, ast }
Example
1var result = babel.transform("code();", options); 2result.code; 3result.map; 4result.ast;
babel.transformFile(filename: string, options?: Object, callback: Function)
Asynchronously transforms the entire contents of a file.
1babel.transformFile(filename, options, callback)Example
1babel.transformFile("filename.js", options, function (err, result) {
2 result; // => { code, map, ast }
3});babel.transformFileSync(filename: string, options?: Object)
Synchronous version of babel.transformFile. Returns the transformed contents of
the filename.
1babel.transformFileSync(filename, options) // => { code, map, ast }Example
1babel.transformFileSync("filename.js", options).code;babel.transformFromAst(ast: Object, code?: string, options?: Object)
Given, an AST, transform it.
1const code = "if (true) return;"; 2const ast = babylon.parse(code, { allowReturnOutsideFunction: true }); 3const { code, map, ast } = babel.transformFromAst(ast, code, options);
Options
Babel CLI
You can pass these options from the Babel CLI like so:
babel --name=value
Following is a table of the options you can use:
| Option | Default | Description |
|---|---|---|
ast | true | Include the AST in the returned object |
auxiliaryCommentAfter | null | Attach a comment after all non-user injected code. |
auxiliaryCommentBefore | null | Attach a comment before all non-user injected code. |
babelrc | true | Specify whether or not to use .babelrc and .babelignore files. Not available when using the CLI, use --no-babelrc instead. |
code | true | Enable code generation |
comments | true | Output comments in generated output. |
compact | "auto" | Do not include superfluous whitespace characters and line terminators. When set to "auto" compact is set to true on input sizes of >500KB. |
env | {} | This is an object of keys that represent different environments. For example, you may have: { env: { production: { /* specific options */ } } } which will use those options when the environment variable BABEL_ENV is set to "production". If BABEL_ENV isn't set then NODE_ENV will be used, if it's not set then it defaults to "development" |
extends | null | A path to an .babelrc file to extend |
filename | "unknown" | Filename for use in errors etc. |
filenameRelative | (filename) | Filename relative to sourceRoot. |
generatorOpts | {} | An object containing the options to be passed down to the babel code generator, babel-generator |
getModuleId | null | Specify a custom callback to generate a module id with. Called as getModuleId(moduleName). If falsy value is returned then the generated module id is used. |
highlightCode | true | ANSI highlight syntax error code frames |
ignore | null | Opposite to the only option. ignore is disregarded if only is specified. |
inputSourceMap | null | A source map object that the output source map will be based on. |
minified | false | Should the output be minified (not printing last semicolons in blocks, printing literal string values instead of escaped ones, stripping () from new when safe) |
moduleId | null | Specify a custom name for module ids. |
moduleIds | false | If truthy, insert an explicit id for modules. By default, all modules are anonymous. (Not available for common modules) |
moduleRoot | (sourceRoot) | Optional prefix for the AMD module formatter that will be prepend to the filename on module definitions. |
only | null | A glob, regex, or mixed array of both, matching paths to only compile. Can also be an array of arrays containing paths to explicitly match. When attempting to compile a non-matching file it's returned verbatim. |
parserOpts | {} | An object containing the options to be passed down to the babel parser, babylon |
plugins | [] | List of plugins to load and use. |
presets | [] | List of presets (a set of plugins) to load and use. |
retainLines | false | Retain line numbers. This will lead to wacky code but is handy for scenarios where you can't use source maps. (NOTE: This will not retain the columns) |
resolveModuleSource | null | Resolve a module source ie. import "SOURCE"; to a custom value. Called as resolveModuleSource(source, filename). |
shouldPrintComment | null | An optional callback that controls whether a comment should be output or not. Called as shouldPrintComment(commentContents). NOTE: This overrides the comment option when used. |
sourceFileName | (filenameRelative) | Set sources[0] on returned source map. |
sourceMaps | false | If truthy, adds a map property to returned output. If set to "inline", a comment with a sourceMappingURL directive is added to the bottom of the returned code. If set to "both" then a map property is returned as well as a source map comment appended. This does not emit sourcemap files by itself! To have sourcemaps emitted using the CLI, you must pass it the --source-maps option. |
sourceMapTarget | (filenameRelative) | Set file on returned source map. |
sourceRoot | (moduleRoot) | The root from which all sources are relative. |
sourceType | "module" | Indicate the mode the code should be parsed in. Can be either "script" or "module". |
wrapPluginVisitorMethod | null | An optional callback that can be used to wrap visitor methods. NOTE: This is useful for things like introspection, and not really needed for implementing anything. Called as wrapPluginVisitorMethod(pluginAlias, visitorType, callback). |
No vulnerabilities found.
Reason
30 commit(s) and 11 issue activity found in the last 90 days -- score normalized to 10
Reason
security policy file detected
Details
- Info: security policy file detected: SECURITY.md:1
- Info: Found linked content: SECURITY.md:1
- Info: Found disclosure, vulnerability, and/or timelines in security policy: SECURITY.md:1
- Info: Found text in security policy: SECURITY.md:1
Reason
no dangerous workflow patterns detected
Reason
license file detected
Details
- Info: project has a license file: LICENSE:0
- Info: FSF or OSI recognized license: MIT License: LICENSE:0
Reason
no binaries found in the repo
Reason
detected GitHub workflow tokens with excessive permissions
Details
- Warn: jobLevel 'contents' permission set to 'write': .github/workflows/release.yml:237
- Warn: jobLevel 'contents' permission set to 'write': .github/workflows/release.yml:58
- Warn: jobLevel 'contents' permission set to 'write': .github/workflows/update-compat-data.yml:15
- Warn: jobLevel 'contents' permission set to 'write': .github/workflows/update-parser-tests.yml:17
- Info: jobLevel 'contents' permission set to 'read': .github/workflows/update-windows-fixtures.yml:16
- Info: jobLevel 'pull-requests' permission set to 'read': .github/workflows/update-windows-fixtures.yml:17
- Info: topLevel 'contents' permission set to 'read': .github/workflows/ci.yml:6
- Info: topLevel 'contents' permission set to 'read': .github/workflows/e2e-tests-breaking-esm.yml:10
- Info: topLevel 'contents' permission set to 'read': .github/workflows/e2e-tests.yml:10
- Info: topLevel 'contents' permission set to 'read': .github/workflows/issue-triage.yml:8
- Info: found token with 'none' permissions: .github/workflows/lock.yml:1
- Info: topLevel 'contents' permission set to 'read': .github/workflows/release.yml:20
- Info: topLevel 'contents' permission set to 'read': .github/workflows/repl.yml:6
- Warn: no topLevel permission defined: .github/workflows/update-compat-data.yml:1
- Info: topLevel 'contents' permission set to 'read': .github/workflows/update-parser-tests.yml:11
- Info: topLevel 'contents' permission set to 'read': .github/workflows/update-windows-fixtures.yml:11
Reason
Found 18/30 approved changesets -- score normalized to 6
Reason
badge detected: InProgress
Reason
SAST tool is not run on all commits -- score normalized to 0
Details
- Warn: 0 commits out of 21 are checked with a SAST tool
Reason
dependency not pinned by hash detected -- score normalized to 0
Details
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- Info: 0 out of 109 GitHub-owned GitHubAction dependencies pinned
- Info: 0 out of 15 third-party GitHubAction dependencies pinned
- Info: 3 out of 8 npmCommand dependencies pinned
Reason
project is not fuzzed
Details
- Warn: no fuzzer integrations found
Reason
26 existing vulnerabilities detected
Details
- Warn: Project is vulnerable to: GHSA-968p-4wvh-cqc8
- Warn: Project is vulnerable to: GHSA-67hx-6x53-jw92
- Warn: Project is vulnerable to: GHSA-93q8-gq69-wqmw
- Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg
- Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
- Warn: Project is vulnerable to: GHSA-434g-2637-qmqr
- Warn: Project is vulnerable to: GHSA-49q7-c7j4-3p7m
- Warn: Project is vulnerable to: GHSA-977x-g7h5-7qgw
- Warn: Project is vulnerable to: GHSA-f7q4-pwc6-w24p
- Warn: Project is vulnerable to: GHSA-fc9h-whq2-v747
- Warn: Project is vulnerable to: GHSA-vjh7-7g9h-fjfh
- Warn: Project is vulnerable to: GHSA-4gmj-3p3h-gm8h
- Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj
- Warn: Project is vulnerable to: GHSA-896r-f27r-55mw
- Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h
- Warn: Project is vulnerable to: GHSA-4xcv-9jjx-gfj3
- Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
- Warn: Project is vulnerable to: GHSA-p8p7-x288-28g6
- Warn: Project is vulnerable to: GHSA-gcx4-mw62-g8wm
- Warn: Project is vulnerable to: GHSA-x6fg-f45m-jf5q
- Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw
- Warn: Project is vulnerable to: GHSA-76p7-773f-r4q5
- Warn: Project is vulnerable to: GHSA-f5x3-32g6-xq36
- Warn: Project is vulnerable to: GHSA-72xf-g2v4-qvf3
- Warn: Project is vulnerable to: GHSA-4vvj-4cpr-p986
- Warn: Project is vulnerable to: GHSA-p9pc-299p-vxgp
Score
6.1
/10
Last Scanned on 2025-03-10
The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.
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