48 lines
1.2 KiB
Markdown
48 lines
1.2 KiB
Markdown
# [TrimKit](https://gitlab.com/explorigin/trimkit)
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TrimKit is a set of DOM and API abstractions for the purpose of better Javascript minification. For example:
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if (a === undefined) { alert('Oops'); }
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minifies down to:
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if(a===void 0){alert('Oops')}
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If we compare against undefined more than 3 times, we can save bytes by doing this:
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function isUndefined(a) { return a === void 0; }
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if (isUndefined(a)) { alert('Oops'); }
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which minifies down to:
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function b(a){return a===void 0}
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if (b(a)){alert('Oops');}
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With enough uses of common APIs, you can win back some bytes.
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NOTE: TrimKit will help you obsess about Javascript file sizes but that does not always translate to smaller files after you apply compression. Because files using have more entropy, small, pre-compression gains can result in after compression losses. YMMV.
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# Abstractions
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- `undefined`
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- `requestAnimationFrame`
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- `Array.isArray`
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- `Array.from`
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- `Object.keys`
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- `document`
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- `typeof obj === 'function'`
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- `typeof obj === 'string'`
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- `typeof obj === 'number'`
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- `null`
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- `obj === undefined`
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- `obj === null`
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- `fn.apply(context, params)`
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## Credit
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Created by [Timothy Farrell](https://github.com/explorigin)
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