message: Use MouseEventHandler as type
diff: @@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
  limitations under the License.
  */
  -import React from "react";
  +import React, { MouseEventHandler } from "react";
  import { useWysiwyg } from "@matrix-org/matrix-wysiwyg";
  import classNames from "classnames";
  @@ -39,7 +39,7 @@ function Tooltip({ label, keyCombo }: TooltipProps) {
  interface ButtonProps extends TooltipProps {
  className: string;
  isActive: boolean;
  - onClick: () => void;
  + onClick: MouseEventHandler<HTMLButtonElement>;
  }
  function Button({ label, keyCombo, onClick, isActive, className }: ButtonProps) {
  