is-minified-performant 🚀

Checks if JS code is minified or uglified performantly. ## Usage ```javascript import { isMinified } from 'is-minified-performant'; ``` ```javascript const source2 = `!function(e){function t(r){if(n[r])return n[r].exports;for(var i=[],o=0;o<256;++o)i[o]=(o+256).toString(16).substr(1);e.exports=r}};`; isMinified(source) // true ``` ```javascript const source1 = ` function main(foo = '') { } const bar = 1; `; isMinified(source) // false ``` ## How It Works Use "Duck Typing" to detect whether source code is minified. > Duck typing in computer programming is an application of the duck test—"If it walks like a duck and it quacks like a duck, then it must be a duck"—In duck typing, an object's suitability is determined by the presence of certain methods and properties, rather than the type of the object itself. > > From [wiki/Duck_typing](https://en.wikipedia.org/wiki/Duck_typing) - no space before `return` - no space before and after `if` or `else` - no space before and after `=` - no space before and after `var` ## Why the Package I tried [is-uglified](https://github.com/RaoHai/is-uglified) which uses acorn parse, [is-minified](https://www.npmjs.com/package/is-minified) using RegExp, and [is-minified-code](https://www.npmjs.com/package/is-minified-code) using RegExp and sort, and finally found "Duck Typing" is the most **performant 🚀** and efficient detect method and the correctness not lower than the above ones. ### Benchmark Results 1 Check [react.development.js](https://unpkg.com/react@17.0.2/umd/react.development.js) not be minified. `npm run benchmark-not-minified`: ``` is-minified-performant#isMinified x 35,459 ops/sec ±0.97% (87 runs sampled) is-uglified#isCodeUglified x 163 ops/sec ±3.73% (77 runs sampled) is-minified#isMinifiedUsingRegexp x 25,229 ops/sec ±3.10% (84 runs sampled) is-minified-code#isMinifiedUsingRegexpAndMedian x 881 ops/sec ±2.40% (81 runs sampled) Check react.development.js not minified: the fastest is is-minified-performant#isMinified ``` This package's checking un-minified source code speed **1.4 times** the second. 2 Check [react.production.min.js is](https://unpkg.com/react@17.0.2/umd/react.production.min.js) be minified. `npm run benchmark-minified`: ``` is-minified-performant#isMinified x 4,270,443 ops/sec ±1.58% (89 runs sampled) is-uglified#isCodeUglified x 412 ops/sec ±5.71% (76 runs sampled) is-minified#isMinifiedUsingRegexp x 240,459 ops/sec ±1.90% (88 runs sampled) is-minified-code#isMinifiedUsingRegexpAndMedian x 81,651 ops/sec ±2.14% (87 runs sampled) Check react.production.min.js minified: the fastest is is-minified-performant#isMinified ``` This package's checking minified source code speed **17 times** the second.