Just a plain interpolation utility but with extracted interpolations to have a look of what variables you can interpolate into

interpolation.ts

type ExtractInterpolations<T extends string> = T extends `${infer _Start}{${infer V}}${infer Rest}` ? V | ExtractInterpolations<Rest> : never
 
/**
 * Interpolates {variable} in string
 */
function interpolate<T extends string>(value: T, vars: Record<ExtractInterpolations<T>, string | number>): string {
  const varKeys = Object.keys(vars) as ExtractInterpolations<T>[]
  return varKeys.reduce((result: string, next) => result.replace(new RegExp(`{${next}}`, "g"), String(vars[next])), value)
}

export default function