39 lines
1.9 KiB
JavaScript
39 lines
1.9 KiB
JavaScript
// Source: https://github.com/ai/nanoid
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// The MIT License (MIT)
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//
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// Copyright 2017 Andrey Sitnik <andrey@sitnik.ru>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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// This alphabet uses `A-Za-z0-9_-` symbols.
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// The order of characters is optimized for better gzip and brotli compression.
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// References to the same file (works both for gzip and brotli):
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// `'use`, `andom`, and `rict'`
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// References to the brotli default dictionary:
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// `-26T`, `1983`, `40px`, `75px`, `bush`, `jack`, `mind`, `very`, and `wolf`
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const urlAlphabet = 'useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict';
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export function nanoid(size = 21) {
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let id = '';
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// A compact alternative for `for (var i = 0; i < step; i++)`.
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let i = size | 0;
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while (i--) {
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// `| 0` is more compact and faster than `Math.floor()`.
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id += urlAlphabet[(Math.random() * 64) | 0];
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}
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return id;
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}
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