Can Babel make Number.prototype.toLocaleString() work alike in React Native on all phones?

user_527702 0
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I'm using Number.prototype.toLocaleString() to get rounding and thousands separators working nicely with world currencies in my first React Native app.

It works great in the iOS but not on Android. I guess the different JS engines have differing support for toLocaleString.

I understand that BabelJS has support for polyfills but don't understand fully what it does and does not cover and cannot find information on this function in particular.

Is there a way I can get it to work in RN using Babl to polyfill it?

polyfills babeljs react-native javascript
1 Answers

Looking up a polyfill for Number#toLocaleString(), I found this module, and it does not require babel to use. In order to activate it in your code, put this line somewhere before you need it :

// recommended
require('number-tolocalestring-polyfill')()

If you need to force the polyfill to load, even if it detects that the environment already supports Number#toLocaleString() you can do this:

// probably for debug purposes only
require('number-tolocalestring-polyfill')(true)
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