In my application there are several places where the user is expected to enter a monetary value. The application supports storing these monetary values in multiple currencies as well as localization.
在我的应用程序中,有几个地方要求用户输入货币值。该应用程序支持以多种货币存储这些货币值以及本地化。
I'm using the Intl.NumberFormat object in Javascript to format a number into any currency and locale I need, but there's no way to unformat the number using that.
我在Javascript中使用Intl.NumberFormat对象将数字格式化为我需要的任何货币和区域设置,但是没有办法使用它来格式化数字。
All of the libraries I've found so far require you to provide the decimal and thousands separators in order for the formatting/unformatting functions to work. However, I need a way to find what the decimal and thousands separators are in the first place so I can't use those.
到目前为止,我发现的所有库都要求您提供十进制和千位分隔符,以便格式化/取消格式化功能起作用。但是,我需要一种方法来找到小数和千位分隔符的位置,所以我不能使用它们。
How can I reliably get the decimal separator for the current locale?
如何可靠地获取当前区域设置的小数分隔符?
1 个解决方案
#1
0
Option 1: using Intl.NumberFormat#formatToParts
选项1:使用Intl.NumberFormat #formatToParts
Most reliable method, only works for browsers supporting the Intl API. Otherwise it requires an Intl polyfill
最可靠的方法,仅适用于支持Intl API的浏览器。否则它需要Intl polyfill
function getDecimalSeparator(locale) {
const numberWithDecimalSeparator = 1.1;
return Intl.NumberFormat(locale)
.formatToParts(numberWithDecimalSeparator)
.find(part => part.type === 'decimal')
.value;
}
Option 2: using toLocaleString
选项2:使用toLocaleString
Less elegant, it relies on the fact that a separator is always one character long, which seems to be the case for all languages: Decimal separator - Wikipedia
不太优雅,它依赖于一个分隔符总是一个字符长的事实,这似乎是所有语言的情况:十进制分隔符 - *
function getDecimalSeparator(locale) {
const numberWithDecimalSeparator = 1.1;
return numberWithDecimalSeparator
.toLocaleString(locale)
.substring(1, 2);
}
This has been suggested here: With a browser, how do I know which decimal separator that the client is using?
这里有人建议:使用浏览器,我如何知道客户端使用哪个小数分隔符?
Examples:
> getDecimalSeparator()
"."
> getDecimalSeparator('fr-FR')
","
Bonus of option 1:
选项1的奖金:
We could extend it to retrieve either the decimal or group separator of a given locale:
我们可以扩展它以检索给定语言环境的小数或组分隔符:
function getSeparator(locale, separatorType) {
const numberWithGroupAndDecimalSeparator = 1000.1;
return Intl.NumberFormat(locale)
.formatToParts(numberWithGroupAndDecimalSeparator)
.find(part => part.type === separatorType)
.value;
}
Examples:
> getSeparator('en-US', 'decimal')
"."
> getSeparator('en-US', 'group')
","
> getSeparator('fr-FR', 'decimal')
","
> getSeparator('fr-FR', 'group')
" "
#1
0
Option 1: using Intl.NumberFormat#formatToParts
选项1:使用Intl.NumberFormat #formatToParts
Most reliable method, only works for browsers supporting the Intl API. Otherwise it requires an Intl polyfill
最可靠的方法,仅适用于支持Intl API的浏览器。否则它需要Intl polyfill
function getDecimalSeparator(locale) {
const numberWithDecimalSeparator = 1.1;
return Intl.NumberFormat(locale)
.formatToParts(numberWithDecimalSeparator)
.find(part => part.type === 'decimal')
.value;
}
Option 2: using toLocaleString
选项2:使用toLocaleString
Less elegant, it relies on the fact that a separator is always one character long, which seems to be the case for all languages: Decimal separator - Wikipedia
不太优雅,它依赖于一个分隔符总是一个字符长的事实,这似乎是所有语言的情况:十进制分隔符 - *
function getDecimalSeparator(locale) {
const numberWithDecimalSeparator = 1.1;
return numberWithDecimalSeparator
.toLocaleString(locale)
.substring(1, 2);
}
This has been suggested here: With a browser, how do I know which decimal separator that the client is using?
这里有人建议:使用浏览器,我如何知道客户端使用哪个小数分隔符?
Examples:
> getDecimalSeparator()
"."
> getDecimalSeparator('fr-FR')
","
Bonus of option 1:
选项1的奖金:
We could extend it to retrieve either the decimal or group separator of a given locale:
我们可以扩展它以检索给定语言环境的小数或组分隔符:
function getSeparator(locale, separatorType) {
const numberWithGroupAndDecimalSeparator = 1000.1;
return Intl.NumberFormat(locale)
.formatToParts(numberWithGroupAndDecimalSeparator)
.find(part => part.type === separatorType)
.value;
}
Examples:
> getSeparator('en-US', 'decimal')
"."
> getSeparator('en-US', 'group')
","
> getSeparator('fr-FR', 'decimal')
","
> getSeparator('fr-FR', 'group')
" "