JavaScript modification for widget for e-commerce platform PrestaShop

1. The widget will be generated from: [login to view URL] 2. Customization will be: 2.1. Make the widget appear when you scroll down 95%-100% to the bottom of the webpage. Make it hide again when widget is 0%-94% of users screen view. 3. On mobile phone the widget should appear on all pages, except checkout pages, or simply when user has logged in. 3.1 On desktop the widget should only appear in the Contact Us page, no need to hide/appear according to view, but always visibel as soon you open Contact Us page. 4. On mobile it will be Facebook, WhatsApp, Viber, Phone contact. 4.1. On desktop only phone contact Adding page-specific CSS and Javascript: [login to view URL] You can work locally, with a PrestaShop 1.6.1.23 installation or on my dev site. Demonstrate that it will work with the free widget, which limits to two social apps, then I can provide the rest, if implementation works as planned.