Method append

out/cli.cjs:51941–51954

(name, value, filename = void 0)

          throw webidl.errors.conversionFailed({
            prefix: "FormData constructor",
            argument: "Argument 1",
            types: ["undefined"]
          });
        }
        this[kState] = [];
      }
      append(name, value, filename = void 0) {
        webidl.brandCheck(this, _FormData);
        webidl.argumentLengthCheck(arguments, 2, { header: "FormData.append" });
        if (arguments.length === 3 && !isBlobLike3(value)) {
          throw new TypeError(
            "Failed to execute 'append' on 'FormData': parameter 2 is not of type 'Blob'"
          );
        }
        name = webidl.converters.USVString(name);
        value = isBlobLike3(value) ? webidl.converters.Blob(value, { strict: false }) : webidl.converters.USVString(value);
        filename = arguments.length === 3 ? webidl.converters.USVString(filename) : void 0;