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/** * convert full-width to half-width in str * @param str string to convert * @param charsets character sets to convert * @returns half-width string */export function toHalfWidth(str: string, charsets: string | RegExp): string{	return str.replace(charsets, (substr) =>	{		return toHalfWidthAll(substr);	});}
/** * convert full-width to half-width * @param str string to convert; ALL ELEMENTS MUST BE FULL-WIDTH! * @returns half-width string */export function toHalfWidthAll(str: string): string{	const charCodes: number[] = [];	for(let index = 0; index < str.length; index++)	{		charCodes.push(str.charCodeAt(index) - 0xfee0);	}
	return String.fromCharCode(...charCodes);}