Merge object passed to localeUtils with Utils

[gpbl]

No description provided.

[gpbl]

I should extract from Utils those function first, otherwise there's the risk a developer would overwrite functions used internally. So Utils should be renamed LocaleUtils, while addons/LocaleUtils should be renamed MomentUtils (or something like that). The internal functions could be moved to Helpers.

[gpbl]

Starting from v1.1, a way for solving this issue is to extends the default localeUtils, e.g.:

import { localeUtils } from "react-day-picker/utils";
function formatMonthTitle() {
 return "Custom Month Title"
}

<DayPicker localeUtils={{ ...LocaleUtils, formatMonthTitle }} />

[bvaughn]

FWYI, (since you pointed to this example in the release notes), I think your example is actually the opposite of what you meant. I think you want...

import { localeUtils } from "react-day-picker/utils";
function formatMonthTitle() {
 return "Custom Month Title"
}

<DayPicker localeUtils={{ ...LocaleUtils, formatMonthTitle }} />

(The custom formatMonthTitle should come after the spread, or it will be overridden by the defaults.)

[gpbl]

Thanks! I fixed the comment 👍