31 lines
854 B
JavaScript
31 lines
854 B
JavaScript
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// This alphabet uses `A-Za-z0-9_-` symbols. The genetic algorithm helped
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// optimize the gzip compression for this alphabet.
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let urlAlphabet =
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'ModuleSymbhasOwnPr-0123456789ABCDEFGHNRVfgctiUvz_KqYTJkLxpZXIjQW'
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let customAlphabet = (alphabet, size) => {
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return () => {
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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
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while (i--) {
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// `| 0` is more compact and faster than `Math.floor()`.
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id += alphabet[(Math.random() * alphabet.length) | 0]
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}
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return id
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}
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}
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let 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
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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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module.exports = { nanoid, customAlphabet }
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