Function fromInput

packages/platform/src/Headers.ts:96–115

(input)

 * @category constructors
 */
export const fromInput: (input?: Input) => Headers = (input) => {
  if (input === undefined) {
    return empty
  } else if (Symbol.iterator in input) {
    const out: Record<string, string> = Object.create(Proto)
    for (const [k, v] of input) {
      out[k.toLowerCase()] = v
    }
    return out as Headers
  }
  const out: Record<string, string> = Object.create(Proto)
  for (const [k, v] of Object.entries(input)) {
    if (Array.isArray(v)) {
      out[k.toLowerCase()] = v.join(", ")
    } else if (v !== undefined) {
      out[k.toLowerCase()] = v as string
    }
  }
  return out as Headers
}

/**
 * @since 1.0.0