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normalCase.ts
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normalCase.ts
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import lowerCase from "./lowerCase.ts";
import nonWordRegexp from "./vendor/nonWordRegexp.ts";
import camelCaseRegexp from "./vendor/camelCaseRegexp.ts";
import camelCaseUpperRegexp from "./vendor/camelCaseUpperRegexp.ts";
export default function normalCase(
str: string,
locale?: string,
replacement?: string,
): string {
if (str == null) {
return "";
}
replacement = typeof replacement !== "string" ? " " : replacement;
function replace(match: string, index: number, value: string): string {
if (index === 0 || index === value.length - match.length) {
return "";
}
return replacement!;
}
str = String(str)
// Support camel case ("camelCase" -> "camel Case").
.replace(camelCaseRegexp, "$1 $2")
// Support odd camel case ("CAMELCase" -> "CAMEL Case").
.replace(camelCaseUpperRegexp, "$1 $2")
// Remove all non-word characters and replace with a single space.
.replace(nonWordRegexp, replace);
// Lower case the entire string.
return lowerCase(str, locale);
}