mirror of https://gitee.com/openkylin/npm.git
43 lines
1004 B
JavaScript
43 lines
1004 B
JavaScript
|
const hasIntl = typeof Intl === 'object' && !!Intl
|
||
|
|
const Collator = hasIntl && Intl.Collator
|
||
|
|
const cache = new Map()
|
||
|
|
|
||
|
|
const collatorCompare = (locale, opts) => {
|
||
|
|
const collator = new Collator(locale, opts)
|
||
|
|
return (a, b) => collator.compare(a, b)
|
||
|
|
}
|
||
|
|
|
||
|
|
const localeCompare = (locale, opts) => (a, b) => a.localeCompare(b, locale, opts)
|
||
|
|
|
||
|
|
const knownOptions = [
|
||
|
|
'sensitivity',
|
||
|
|
'numeric',
|
||
|
|
'ignorePunctuation',
|
||
|
|
'caseFirst',
|
||
|
|
]
|
||
|
|
|
||
|
|
const { hasOwnProperty } = Object.prototype
|
||
|
|
|
||
|
|
module.exports = (locale, options = {}) => {
|
||
|
|
if (!locale || typeof locale !== 'string')
|
||
|
|
throw new TypeError('locale required')
|
||
|
|
|
||
|
|
const opts = knownOptions.reduce((opts, k) => {
|
||
|
|
if (hasOwnProperty.call(options, k)) {
|
||
|
|
opts[k] = options[k]
|
||
|
|
}
|
||
|
|
return opts
|
||
|
|
}, {})
|
||
|
|
const key = `${locale}\n${JSON.stringify(opts)}`
|
||
|
|
|
||
|
|
if (cache.has(key))
|
||
|
|
return cache.get(key)
|
||
|
|
|
||
|
|
const compare = hasIntl
|
||
|
|
? collatorCompare(locale, opts)
|
||
|
|
: localeCompare(locale, opts)
|
||
|
|
cache.set(key, compare)
|
||
|
|
|
||
|
|
return compare
|
||
|
|
}
|