fix(donate): reset "other" value when switching tiers

src/blocks/donate/frequency-based/index.ts

@@ -2,3 +2,63 @@
  * Internal dependencies
  */
 import './style.scss';
+
+/**
+ * Specify a function to execute when the DOM is fully loaded.
+ *
+ * @see https://github.com/WordPress/gutenberg/blob/trunk/packages/dom-ready/
+ *
+ * @param {Function} callback A function to execute after the DOM is ready.
+ * @return {void}
+ */
+function domReady( callback: () => void ): void {
+	if ( typeof document === 'undefined' ) {
+		return;
+	}
+	if (
+		document.readyState === 'complete' || // DOMContentLoaded + Images/Styles/etc loaded, so we call directly.
+		document.readyState === 'interactive' // DOMContentLoaded fires at this point, so we call directly.
+	) {
+		return void callback();
+	}
+	// DOMContentLoaded has not fired yet, delay callback until then.
+	document.addEventListener( 'DOMContentLoaded', callback );
+}
+
+const resetOtherValue = ( container: HTMLElement ) => {
+	const frequencies = container.querySelectorAll( '.tiers' );
+	if ( ! frequencies?.length ) {
+		return;
+	}
+	const frequencyInputs = container.querySelectorAll( 'input[name="donation_frequency"]' );
+	frequencies.forEach( frequency => {
+		const tiers = frequency.querySelectorAll( 'input[type="radio"]' );
+		const input = <HTMLInputElement>frequency.querySelector( '.money-input input' );
+		if ( ! tiers?.length || ! input ) {
+			return;
+		}
+		const originalValue = input.getAttribute( 'value' );
+		const reset = () => {
+			input.value = originalValue || '';
+		};
+		tiers.forEach( tierInput => {
+			tierInput.addEventListener( 'change', reset );
+		} );
+		frequencyInputs.forEach( frequencyInput => {
+			frequencyInput.addEventListener( 'change', reset );
+		} );
+	} );
+};
+
+export const processFrequencyBasedElements = ( parentEl = document ) => {
+	const elements = parentEl.querySelectorAll(
+		'.wpbnbd--frequency-based'
+	) as NodeListOf< HTMLElement >;
+	elements.forEach( container => {
+		resetOtherValue( container );
+	} );
+};
+
+if ( typeof window !== 'undefined' ) {
+	domReady( () => processFrequencyBasedElements() );
+}