The toLocaleString()
method of Number
values returns a string with a language-sensitive representation of this number. In implementations with Intl.NumberFormat
API support, this method simply calls Intl.NumberFormat
.
Every time toLocaleString
is called, it has to perform a search in a big database of localization strings, which is potentially inefficient. When the method is called many times with the same arguments, it is better to create a Intl.NumberFormat
object and use its format()
method, because a NumberFormat
object remembers the arguments passed to it and may decide to cache a slice of the database, so future format
calls can search for localization strings within a more constrained context.