https://github.com/karimsa/babel-preset-mjs

Babel preset to transpile JS to restricted mjs JS.
https://github.com/karimsa/babel-preset-mjs

Last synced: about 2 months ago
JSON representation

Babel preset to transpile JS to restricted mjs JS.

• Host: GitHub
• URL: https://github.com/karimsa/babel-preset-mjs
• Owner: karimsa
• License: mit
• Created: 2017-05-16T16:16:07.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-06-14T04:41:26.000Z (over 7 years ago)
• Last Synced: 2024-10-03T02:17:35.763Z (3 months ago)
• Language: JavaScript
• Homepage:
• Size: 22.5 KB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

Awesome Lists containing this project

• awesome-mongoose-os - babel-preset-mjs - Babel preset to transpile JS to restricted mjs JS (Awesome Mongoose OS [](https://awesome.re) / Community Tutorials)

README

        
# babel-preset-mjs

Babel preset to transpile JS to restricted

[mjs](https://github.com/cesanta/mjs) JS.

## Features

| Restriction | Solution |

| ----------- | -------- |

| No String, Number, RegExp, Date, Function, etc. | **Not solved** |

| No try/catch/finally. | Transpiled to functions that make try/catch/finally work. |

| No error classes. | **Not solved** |

| No `new` or prototypes. In order to create an object with a custom prototype, use **`Object.create()`**, which is available. | `new` is handled by `Object.create()`, and the constructor is called on the resultant object |

| Strict mode only. No `for..of`, `=>`, destructors, generators, proxies, promises, classes, template strings. | Handled by `babel-preset-es2015` (included by default). |

| No `var`, only `let`. | All uses of `var` are changed to `let`. |

| No getters, setters, `valueOf`. | **Not solved** |

| No `==` or `!=`, only `===` and `!==`. | All uses of `==` are transpiled to a manually evaluated loose equals.  |

| `load()` is used to load external JS, not very standardized and pollutes the global scope. | **Not solved** |

| No `setTimeout()` and `setInterval()` API. | Polyfilled using `api_timer.js`. |

## Usage

`.babelrc`:

```json

{

  "presets": [

    "mjs"

  ]

}

```

## License

Licensed under [MIT](LICENSED.md) license.

Copyright (C) 2017 Karim Alibhai.