File size: 3,353 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | import { graphql } from 'gatsby';
import PropTypes from 'prop-types';
import React from 'react';
import { Container } from 'react-bootstrap';
import Layout from '../components/Layout';
import Example from '../components/Example';
const propTypes = {
location: PropTypes.object.isRequired,
data: PropTypes.shape({
site: PropTypes.shape({
siteMetadata: PropTypes.shape({
componentPages: PropTypes.arrayOf(
PropTypes.shape({
path: PropTypes.string.isRequired,
displayName: PropTypes.string.isRequired,
})
).isRequired,
}).isRequired,
}).isRequired,
}).isRequired,
};
const WithReactRouter = ({ data, location }) => (
<Layout data={data} location={location}>
<Container>
<h1>Usage with React Router</h1>
<p>
People often want to animate route transitions, which can result in
delightful UX when used in moderation. The first instinct might be to
use wrap all routes in <code>TransitionGroup</code>, but that approach
requires hacks and falls apart easily when used with trickier components
of React Router like <code>Redirect</code>. You should use{' '}
<code>CSSTransition</code> for each route and manage their{' '}
<code>in</code> prop on their own.
</p>
<p>
The main challenge is the <strong>exit</strong> transition because React
Router changes to a new route instantly, so we need to keep the old
route around long enough to transition out of it. Fortunately,{' '}
<code>Route</code>
's <code>children</code> prop also accepts a <em>function</em>, which
should not be confused with the <code>render</code> prop! Unlike the{' '}
<code>render</code> prop, <code>children</code> function runs whether
the route is matched or not. React Router passes the object containing a{' '}
<code>match</code> object, which exists if the route matches, otherwise
it's <code>null</code>. This enables us to manage the <code>in</code>{' '}
prop of <code>CSSTransition</code> based on the presence of{' '}
<code>match</code>.
</p>
<p>
Exit transitions will cause the content of routes to linger until they
disappear, which might pose some styling challenges. Make sure that
routes don't affect each other's layout, for example you can remove them
from the flow of the document by using absolute or fixed positioning.
</p>
<blockquote>
<p>
<b>Note</b>: When using React Transition Group with React Router, make
sure to avoid using the <code>Switch</code> component because it only
executes the first matching <code>Route</code>. This would make the
exit transition impossible to achieve because the exiting route will
no longer match the current URL and the <code>children</code> function
won't execute.
</p>
</blockquote>
</Container>
<Example
codeSandbox={{
title: 'CSSTransition + React Router',
id: '38qm5m0mz1',
}}
/>
</Layout>
);
WithReactRouter.propTypes = propTypes;
export default WithReactRouter;
export const pageQuery = graphql`
query WithReactRouterQuery {
site {
...Layout_site
}
}
`;
|