这是另一个国际化的实现,使用TypeScript编写:
const UNITS = ['byte', 'kilobyte', 'megabyte', 'gigabyte', 'terabyte', 'petabyte']
const BYTES_PER_KB = 1000
export function humanFileSize(sizeBytes: number | bigint): string {
let size = Math.abs(Number(sizeBytes))
let u = 0
while(size >= BYTES_PER_KB && u < UNITS.length-1) {
size /= BYTES_PER_KB
++u
}
return new Intl.NumberFormat([], {
style: 'unit',
unit: UNITS[u],
unitDisplay: 'short',
maximumFractionDigits: 1,
}).format(size)
}
用语言代码替换[]
,例如fr
,可以强制使用非默认的本地化设置。
console.log(humanFileSize(0))
console.log(humanFileSize(9))
console.log(humanFileSize(99))
console.log(humanFileSize(999))
console.log(humanFileSize(1000))
console.log(humanFileSize(1001))
console.log(humanFileSize(1023))
console.log(humanFileSize(1024))
console.log(humanFileSize(1025))
console.log(humanFileSize(100_000))
console.log(humanFileSize(1_000_000))
console.log(humanFileSize(1_000_000_000))
console.log(humanFileSize(1_000_000_000_000))
console.log(humanFileSize(1_000_000_000_000_000))
console.log(humanFileSize(1_000_000_000_000_000_000))
// fr
0 o
9 o
99 o
999 o
1 ko
1 ko
1 ko
1 ko
1 ko
100 ko
1 Mo
1 Go
1 To
1 Po
1 000 Po
// en-US
0 byte
9 byte
99 byte
999 byte
1 kB
1 kB
1 kB
1 kB
1 kB
100 kB
1 MB
1 GB
1 TB
1 PB
1,000 PB
现在您可以使用Intl.NumberFormat
自动进行单位转换。例如:
const sizeFormatter = new Intl.NumberFormat([], {
style: 'unit',
unit: 'byte',
notation: "compact",
unitDisplay: "narrow",
})
console.log(sizeFormatter.format(0))
console.log(sizeFormatter.format(1))
console.log(sizeFormatter.format(999))
console.log(sizeFormatter.format(1000))
console.log(sizeFormatter.format(1023))
console.log(sizeFormatter.format(1024))
console.log(sizeFormatter.format(1024**2))
console.log(sizeFormatter.format(1024**3))
console.log(sizeFormatter.format(1024**4))
console.log(sizeFormatter.format(1024**5))
console.log(sizeFormatter.format(1024**6))
...但单位有点奇怪,比如1024**4
是1.1BB
,我猜是“十亿字节”,尽管它在技术上是正确的,但我认为没有人会使用它。
1.445281982421875
,正确地四舍五入为1.4。 - mpen