Merge pull request #73 from Travelopia/fix/tabs-component-nested-tabs

Fix tabs web components nested tabs issues

Author: junaid-travelopia

src/tabs/tp-tabs.ts

@@ -59,11 +59,14 @@ export class TPTabsElement extends HTMLElement {
 			return;
 		}
 
+		// Get current nested tab if has.
+		const currentNestedTab = this.getCurrentNestedTab( currentTab );
+
 		// Update nav items.
 		const navItems: NodeListOf<TPTabsNavItemElement> = this.querySelectorAll( 'tp-tabs-nav-item' );
 		if ( navItems ) {
 			navItems.forEach( ( navItem: TPTabsNavItemElement ): void => {
-				if ( navItem.isCurrentTab( currentTab ) ) {
+				if ( navItem.isCurrentTab( currentTab ) || ( currentNestedTab && navItem.isCurrentTab( currentNestedTab ) ) ) {
 					navItem.setAttribute( 'active', 'yes' );
 				} else {
 					navItem.removeAttribute( 'active' );
@@ -75,7 +78,7 @@ export class TPTabsElement extends HTMLElement {
 		const tabs: NodeListOf<TPTabsTabElement> = this.querySelectorAll( 'tp-tabs-tab' );
 		if ( tabs ) {
 			tabs.forEach( ( tab: TPTabsTabElement ): void => {
-				if ( currentTab === tab.getAttribute( 'id' ) ) {
+				if ( currentTab === tab.getAttribute( 'id' ) || ( currentNestedTab && currentNestedTab === tab.getAttribute( 'id' ) ) ) {
 					tab.setAttribute( 'open', 'yes' );
 				} else {
 					tab.removeAttribute( 'open' );
@@ -92,10 +95,8 @@ export class TPTabsElement extends HTMLElement {
 			return;
 		}
 
-		const urlHash: string = window.location.hash;
-		if ( '' !== urlHash ) {
-			this.setAttribute( 'current-tab', urlHash.replace( '#', '' ) );
-		}
+		// Set current assiociated tab.
+		this.setCurrentTab();
 	}
 
 	/**
@@ -104,6 +105,35 @@ export class TPTabsElement extends HTMLElement {
 	 * @param {string} tabId Tab ID.
 	 */
 	setCurrentTab( tabId: string = '' ): void {
-		this.setAttribute( 'current-tab', tabId );
+		if ( '' !== tabId ) {
+			this.setAttribute( 'current-tab', tabId );
+		}
+
+		// Set current tab based on current url hash.
+		const urlHash: string = window.location.hash;
+		if ( '' !== urlHash ) {
+			const currentLink: HTMLAnchorElement | null = this.querySelector( `a[href="${ urlHash }"]` );
+			const currentTab = currentLink?.closest( 'tp-tabs' );
+			currentTab?.setAttribute( 'current-tab', urlHash.replace( '#', '' ) );
+		}
+	}
+
+	/**
+	 * Get current nested tab.
+	 *
+	 * @param {string} currentTab Tab ID.
+	 *
+	 * @return {string} If has Nested current tab or empty.
+	 */
+	getCurrentNestedTab( currentTab: string = '' ): string {
+		if ( '' === currentTab ) {
+			return '';
+		}
+
+		const currentTabElement = this.querySelector( `tp-tabs-tab[id="${ currentTab }"]` );
+		const currentNestedTabElement = currentTabElement?.querySelector( 'tp-tabs' );
+		const currentNestedTab = currentNestedTabElement?.getAttribute( 'current-tab' );
+
+		return currentNestedTab ?? '';
 	}
 }