Ensure event argument is optional (#686)

src/components/PrintContext.tsx

@@ -3,7 +3,7 @@ import * as React from "react";
 const contextEnabled = Object.prototype.hasOwnProperty.call(React, "createContext");
 
 export interface IPrintContextProps {
-    handlePrint: (event: unknown, content?: (() => React.ReactInstance | null)) => void,
+    handlePrint: (event?: unknown, content?: (() => React.ReactInstance | null)) => void,
 }
 
 export const PrintContext = contextEnabled ? React.createContext({} as IPrintContextProps) : null;

src/components/ReactToPrint.tsx

@@ -109,9 +109,7 @@ export class ReactToPrint extends React.Component<IReactToPrintProps> {
     }
 
     public handleClick (
-        /* eslint-disable-next-line no-unused-vars */
-        // @ts-expect-error variable is unused
-        event: unknown, 
+        _event?: unknown, 
         content?: (() => React.ReactInstance | null)
     ) {
         const {

src/hooks/useReactToPrint.ts

@@ -6,7 +6,7 @@ import type { IReactToPrintProps } from "../types/reactToPrintProps";
 import { wrapCallbackWithArgs } from "../utils/wrapCallbackWithArgs";
 
 type UseReactToPrintHookReturn = (
-    event: unknown,
+    event?: unknown,
     content?: (() => React.ReactInstance | null)
 ) => void;
 
@@ -30,11 +30,10 @@ export const useReactToPrint = (props: IReactToPrintProps): UseReactToPrintHookR
     );
 
     return React.useCallback(
-        (event: unknown, content?: (() => React.ReactInstance | null)) => {
+        (event?: unknown, content?: (() => React.ReactInstance | null)) => {
         /* eslint-disable-next-line @typescript-eslint/unbound-method */
         const triggerPrint = wrapCallbackWithArgs(reactToPrint, reactToPrint.handleClick, content);
-        // NOTE: `event` is a no-use argument
-        // (necessary for backward compatibility with older versions)
+        // NOTE: `event` is an unused argument, necessary for backward compatibility with older versions
         return triggerPrint(event);
     }, [reactToPrint]);
 };

src/types/reactToPrintProps.ts

@@ -1,7 +1,7 @@
 import type { Font } from "./font";
 
 export interface ITriggerProps<T> {
-    onClick: (event: unknown) => void;
+    onClick: (event?: unknown) => void;
     ref: (v: T) => void;
 }