“GoToTop”: a (scroll to top elevator) styled component for React JS with TypeScript

I am sharing here a “GoToTop” React JS component that I created today. This component will render a button (shaped as an arrow) when the user scrolls down, past a certain point. When clicked, this button will execute a handleGoToTop() function that will smoothly scroll the screen back to the top.

This is a styled component, making it very portable. It also uses React hooks and TypeScript.

1. The “GoToTop” component

// src/components/GoToTop/index.tsx

import React, { useState, useEffect } from 'react';
import { Container } from './styles';

const GoToTop: React.FC = () => {
  const [scrolled, setScrolled] = useState(false);

  useEffect(() => {
    window.addEventListener('scroll',() => {
      const isTop = window.scrollY < 150;

      isTop !== true ? setScrolled(true) : setScrolled(false);
  }, []);

  function handleGoToTop() {
      top: 0,
      behavior: "smooth"
  return (
        { scrolled && <button id="goToTop" onClick={() => handleGoToTop()} title="Go to top"></button> }

export default GoToTop;

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Getting Started with Styled Components in React JS and TypeScript

Among the several strategies aimed at increasing the productivity of a development team, the proper organization of the code related to the software being conceived undoubtedly occupies a preponderant place. Over the years, several methods and tools have been created for this purpose. It is important to know them, especially since they can very concretely result in a substantial saving of time, at least in terms of maintenance activities and bug fixing.

In this context, we’ll take a look at how to deploy styled components in a React JS project with TypeScript using the styled-components library. This technique allows components to contain their own styles. This “encapsulation” of styles also involves CSS in JS, using tagged template literals.

Youtube demo:

Github repository: https://github.com/xdth/styled-components-demo

First step: generation of files and installation of project dependencies

Generate React project files with TypeScript

create-react-app styled-components-demo --template typescript

Read more “Getting Started with Styled Components in React JS and TypeScript”