Method append

github-actions/saucelabs/set-saucelabs-env.js:5199–5213

(name, value, filename = void 0)

          if (form !== 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);
          const prefix = "FormData.append";
          webidl.argumentLengthCheck(arguments, 2, prefix);
          if (arguments.length === 3 && !isBlobLike(value)) {
            throw new TypeError(
              "Failed to execute 'append' on 'FormData': parameter 2 is not of type 'Blob'"
            );
          }
          name = webidl.converters.USVString(name, prefix, "name");
          value = isBlobLike(value) ? webidl.converters.Blob(value, prefix, "value", { strict: false }) : webidl.converters.USVString(value, prefix, "value");