https://github.com/yehzhang/babel-plugin-drop-hof

Transforms higher-order function calls such as map, filter, and reduce to loops.
https://github.com/yehzhang/babel-plugin-drop-hof

babel babel-plugin javascript optimization performance

Last synced: 2 months ago
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Transforms higher-order function calls such as map, filter, and reduce to loops.

• Host: GitHub
• URL: https://github.com/yehzhang/babel-plugin-drop-hof
• Owner: yehzhang
• License: mit
• Created: 2017-09-29T01:16:19.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2024-06-18T03:58:50.000Z (7 months ago)
• Last Synced: 2024-11-16T12:43:59.354Z (2 months ago)
• Topics: babel, babel-plugin, javascript, optimization, performance
• Language: JavaScript
• Homepage:
• Size: 26.4 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# babel-plugin-drop-hof

> Transforms higher-order function calls to loops.

Currently supported higher-order functions are: `forEach`, `map`, `filter`, `every`, `some`, and `reduce`.

## Example

**In**

```javascript

var result = array.map(function (x) {

  return x * 2;

});

```

**Out**

```javascript

var _a = array;

var _i = 0;

var _f = function _f(x) {

  return x * 2;

};

var _r = [];

for (; _i < _a.length; _i++) {

  var _e = _a[_i];

  var _z;

  _z = _f(_e, _i, _a);

  _r.push(_z);

}

var result = _r;

```

Some corner cases are handled properly:

**In**

```javascript

isValid() && array.map(function (x) {

  return x * 2;

});

while (array.map(function (x) {

  return x * 2;

}));

```

**Out**

```javascript

// **Same as input**

```

## Installation

```sh

npm install --save babel-plugin-drop-hof

```

## Usage

### Via `.babelrc`

**.babelrc**

```json

{

  "plugins": ["babel-plugin-drop-hof"]

}

```

### Via CLI

```sh

babel --plugins babel-plugin-drop-hof script.js

```

### Via Node API

```javascript

require("babel-core").transform("code", {

  plugins: ["babel-plugin-drop-hof"]

});

```