React Route Transition

A tiny (1.4kb gzipped) and simple transition orchestrator for React.

Example. Blog Post.

Install

yarn add react-route-transition
# or npm install --save react-route-transition

API

<RouteTransitionProvider> - for react-route-transition to work you first need to wrap your app with this provider (place it inside of react-router's Router).

useTransitionHistory() - returns an object with a single function named push that accepts a path (string) and an optional state object. Calling this starts the orchestrator, which fires the relevant onLeave animations, waits for them to finish, changes the route and fires the relevant onEnter animations.

useTransition(options: ITransitionOptions) - this hook registers animations for the current components (it tells react-route-transition which route changes this component listens to and which animations it should fire accordingly). It accepts an object that looks as follows:

useTransition({
  // the list of "handlers"
  handlers: [
    {
      // each handler can either define a path, the path can either be a
      // string/regexp (single path), or an array of strings/regexps (multiple
      // paths)
      //
      path: '/signin',
      // each handler should implement either an onEnter callback, that will
      // be fired once entering said path, or an onLeave callback, or both
      //
      onEnter: async () => {
        await gsap.timeline().fromTo(
          '[data-signin-wrapper] > *',
          { y: 20, opacity: 0 },
          {
            y: 0,
            duration: 0.6,
            stagger: 0.125,
            opacity: 1,
          }
        );
      },
      onLeave: async () => {
        await gsap.timeline().to('[data-home-main] > *, [data-home-footer]', {
          duration: 0.6,
          stagger: 0.125,
          opacity: 0,
          y: -20,
        });
      },
    },
    // ... more handlers
  ],
});

Example Usage

If you are using react-router:

App.js:

import { BrowserRouter as Router, Route } from 'react-router-dom';
import { RouteTransitionProvider } from 'react-route-transition';
// import Home and SignIn components...

export default function () {
  return (
    <Router>
      <RouteTransitionProvider>
        <Route path="/" exact>
          <Home />
        </Route>
        <Route path="/signin" exact>
          <SignIn />
        </Route>
      </RouteTransitionProvider>
    </Router>
  );
}

Home.js:

import React from 'react';
import gsap from 'gsap';
import { useTransition, useTransitionHistory } from 'react-route-transition';

export default function () {
  const history = useTransitionHistory();

  // The following tells react-router-transition that whenever the user
  // navigates to '/', call the first function (start the first animation),
  // and whenever the user leaves '/' call the second function *before* pushing
  // the new path to the react-router history.
  //
  useTransition({
    handlers: [
      {
        path: '/',
        onEnter: async () => {
          await gsap
            .timeline()
            .fromTo(
              '[data-home-main] > *, [data-home-footer]',
              { opacity: 0, y: 20 },
              { duration: 0.6, stagger: 0.125, y: 0, opacity: 1 }
            );
        },
        onLeave: async () => {
          await gsap.timeline().to('[data-home-main] > *, [data-home-footer]', {
            duration: 0.6,
            stagger: 0.125,
            opacity: 0,
            y: -20,
          });
        },
      },
    ],
  });

  async function handleSignIn(e) {
    e.preventDefault();
    // remember this is react-route-animation's push() method, which wraps
    // react-router's method and plays the animations
    //
    history.push('/signin');
  }

  return (
    <div>
      <nav>
        <a href="/signin" onClick={handleSignIn}>
          Sign In
        </a>
      </nav>
      <main data-home-main>{/* this content will be animated */}</main>
      <footer data-home-footer>{/* some stuff here as well */}</footer>
    </div>
  );
}

SignIn.js:

// same imports as above...

export default function () {
  const history = useTransitionHistory();

  useTransition({
    handlers: [
      {
        path: '/signin',
        onEnter: async () => {
          gsap.timeline().fromTo(
            '[data-signin-wrapper] > *',
            { y: 20, opacity: 0 },
            {
              y: 0,
              duration: 0.6,
              stagger: 0.125,
              opacity: 1,
            }
          );
        },
        onLeave: async () => {
          await gsap.timeline().to('[data-home-main] > *, [data-home-footer]', {
            duration: 0.6,
            stagger: 0.125,
            opacity: 0,
            y: -20,
          });
        },
      },
    ],
  });

  async function handleBackToHome(e) {
    e.preventDefault();
    history.push('/');
  }

  return <div data-signin-wrapper>{/* this content will be animated */}</div>;
}

If you are not using react-router you can still use react-route-transition, only you need to provide <TransitionProvider> two props:

• push: (path: History.Path, state?: History.LocationState) => void - an object with a single function called push that accepts a path (string) and an optional state. When calling that push method the current route should change.
• location: { pathname: History.Path } - an object with a prop named pathname that listens to path changes and updates accordingly.

Also, you will need to import <TransitionProvider> from react-route-transition/core:

import { TransitionProvider } from 'react-route-transition/core';

More options

Say you want one leave animation to start when the user navigates from the Sign In screen to the App screen but a different one when the user navigates from the Sign In screen to the Home screen.

You can do it by defining a from and a to prop, for example:

useTransition({
  handlers: [
    {
      from: '/signin',
      to: '/app',
      onLeave: async () => {
        // some crazy animation
      },
    },
    {
      from: '/signin',
      to: '/',
      onLeave: async () => {
        // some other crazy animation
      },
    },
  ],
});

License

MIT