32 lines
774 B
JavaScript
32 lines
774 B
JavaScript
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/* uuid生成器 */
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export function uuid(len, radix) {
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var chars =
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'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
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var uuid = [],
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i
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radix = radix || chars.length
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if (len) {
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// Compact form
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for (i = 0; i < len; i++) uuid[i] = chars[0 | (Math.random() * radix)]
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} else {
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// rfc4122, version 4 form
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var r
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// rfc4122 requires these characters
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uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
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uuid[14] = '4'
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// Fill in random data. At i==19 set the high bits of clock sequence as
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// per rfc4122, sec. 4.1.5
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for (i = 0; i < 36; i++) {
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if (!uuid[i]) {
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r = 0 | (Math.random() * 16)
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uuid[i] = chars[i == 19 ? (r & 0x3) | 0x8 : r]
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}
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}
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}
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return uuid.join('')
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}
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