Method set

deps/undici/undici.js:11874–11898

(name, value)

      }
      // https://fetch.spec.whatwg.org/#dom-headers-set
      set(name, value) {
        webidl.brandCheck(this, _Headers);
        webidl.argumentLengthCheck(arguments, 2, "Headers.set");
        const prefix = "Headers.set";
        name = webidl.converters.ByteString(name, prefix, "name");
        value = webidl.converters.ByteString(value, prefix, "value");
        value = headerValueNormalize(value);
        if (!isValidHeaderName(name)) {
          throw webidl.errors.invalidArgument({
            prefix,
            value: name,
            type: "header name"
          });
        } else if (!isValidHeaderValue(value)) {
          throw webidl.errors.invalidArgument({
            prefix,
            value,
            type: "header value"
          });
        }
        if (this.#guard === "immutable") {
          throw new TypeError("immutable");
        }
        this.#headersList.set(name, value, false);
      }
      // https://fetch.spec.whatwg.org/#dom-headers-getsetcookie
      getSetCookie() {
        webidl.brandCheck(this, _Headers);