Function append

frontend/src/client/core/request.ts:43–45

(key: string, value: unknown)

  const qs: string[] = []

  const append = (key: string, value: unknown) => {
    qs.push(`${encodeURIComponent(key)}=${encodeURIComponent(String(value))}`)
  }

  const encodePair = (key: string, value: unknown) => {
    if (value === undefined || value === null) {