How to use referrer on a button in Velo

[CODE-NINJA]

@Seraphel_Kay

import {session} from 'wix-storage-frontend';
import wixLocationFrontend from 'wix-location-frontend';

let navData = {};

$w.onReady(function () {
   navData.previousPageURL = JSON.parse(session.getItem(navData)).previousPageURL;
   navData.currentPageURL =  wixLocationFrontend.url;
   console.log('Navigation-Data: ', navData);
   session.setItem("navData", JSON.stringify(navData));
})

I expanded the example for you, take a look onto it and check the LOGS in CONSOLE…

This is the running code on MASTER-PAGE…

import wixLocation from 'wix-location';
import {session} from 'wix-storage-frontend';

$w.onReady(()=> {let memoryData = JSON.parse(session.getItem('memoryData')); 
	if(memoryData) {
		memoryData.prevPageURL = memoryData.curPageURL
		memoryData.curPageURL = wixLocation.url;
		session.setItem("memoryData", JSON.stringify(memoryData));
		console.log('Mem-Data: ', memoryData);
	}
	else {let memoryData = {};
		memoryData.curPageURL =  wixLocation.url;
		session.setItem("memoryData", JSON.stringify(memoryData));
	}
	//--------------------------
	$w('#btnA').onClick(()=>{wixLocation.to('https://russian-dima.wixstudio.io/test-site-repeater/pagea')});  
	$w('#btnB').onClick(()=>{wixLocation.to('https://russian-dima.wixstudio.io/test-site-repeater/pageb')});  
	$w('#btnC').onClick(()=>{wixLocation.to('https://russian-dima.wixstudio.io/test-site-repeater/pagec')}); 
	//-------------------------	
});

→ navData —> is now —> memoryData → including current and previous URL of a navigated page.

This code is running on master-page.
This way → YOU ALWAYS KNOW WHICH IS THE CURRENT LOCATION AND WHICH ONE WAS THE PREVIOUS ONE.

To create a → BACK-BUTTON ← all you will have to do is to get the previous-URL out of the MEMORY-OBJECT and navigate to this URL.

I implemented a → BACK-BUTTON-FUNCTION only on → PAGE-B…

import wixLocation from 'wix-location';
import {session} from 'wix-storage-frontend';

$w.onReady(()=>{let memoryData = JSON.parse(session.getItem('memoryData')); 
    $w('#btn2Back').onClick(()=>{wixLocation.to(memoryData.prevPageURL)});  
});

Check it out…
https://russian-dima.wixstudio.io/test-site-repeater/pagea