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Defer babel loading #100

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Merged
bvaughn merged 8 commits into from
Oct 11, 2017
Merged

Defer babel loading #100

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1d48f75
load babel only when needed
renanpvaz Oct 9, 2017
80b1b83
linting fixes
renanpvaz Oct 9, 2017
7efe10f
update constant name
renanpvaz Oct 9, 2017
b843de7
Merge branch 'master' of https://github.com/reactjs/reactjs.org into …
renanpvaz Oct 9, 2017
a02139b
undo changes to algolia search
renanpvaz Oct 10, 2017
36e1185
render simple placeholder while Babel loads
renanpvaz Oct 11, 2017
0a255fe
Merge branch 'master' of https://github.com/reactjs/reactjs.org into …
renanpvaz Oct 11, 2017
ba6a786
simplify placeholder
renanpvaz Oct 11, 2017
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1 change: 0 additions & 1 deletion src/html.js
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Expand Up @@ -22,7 +22,6 @@ if (process.env.NODE_ENV === `production`) {

const JS_NPM_URLS = [
'//unpkg.com/docsearch.js@2.4.1/dist/cdn/docsearch.min.js',
'//unpkg.com/babel-standalone@6.26.0/babel.min.js',
];

export default class HTML extends Component {
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2 changes: 2 additions & 0 deletions src/layouts/index.js
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Expand Up @@ -19,6 +19,8 @@ import Flex from 'components/Flex';
import Footer from 'components/LayoutFooter';
import Header from 'components/LayoutHeader';
import {media} from 'theme';
import loadScript from 'utils/loadScript';
import {algoliaURL} from 'site-constants';
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@bvaughn bvaughn Oct 10, 2017

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These imports can be removed ^


// Import global styles
import '../prism-styles';
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3 changes: 2 additions & 1 deletion src/site-constants.js
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Expand Up @@ -14,5 +14,6 @@
// the SSR part in node.js we won't have a proper location.
const urlRoot = 'https://reactjs.org';
const version = '16.0.0';
const babelURL = '//unpkg.com/babel-standalone@6.26.0/babel.min.js';

export {urlRoot, version};
export {urlRoot, version, babelURL,};
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@bvaughn bvaughn Oct 10, 2017

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Run yarn prettier to fix this formatting ^ (the trailing comma should be removed)

12 changes: 8 additions & 4 deletions src/templates/home.js
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Expand Up @@ -18,13 +18,17 @@ import React, {Component} from 'react';
import TitleAndMetaTags from 'components/TitleAndMetaTags';
import {colors, media, sharedStyles} from 'theme';
import createOgUrl from 'utils/createOgUrl';
import loadScript from 'utils/loadScript';
import {babelURL} from 'site-constants';

class Home extends Component {
componentDidMount() {
mountCodeExample('helloExample', HELLO_COMPONENT);
mountCodeExample('timerExample', TIMER_COMPONENT);
mountCodeExample('todoExample', TODO_COMPONENT);
mountCodeExample('markdownExample', MARKDOWN_COMPONENT);
loadScript(babelURL).then(() => {
mountCodeExample('helloExample', HELLO_COMPONENT);
mountCodeExample('timerExample', TIMER_COMPONENT);
mountCodeExample('todoExample', TODO_COMPONENT);
mountCodeExample('markdownExample', MARKDOWN_COMPONENT);
});
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@bvaughn bvaughn Oct 9, 2017

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What are your thoughts about showing a loading placeholder in the 4 divs in question until Babel has finished loading?

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@renanpvaz renanpvaz Oct 9, 2017

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It's a good idea, I can see that it is flashing once it loads. To fix this should I style the divs at content/index.md?

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@bvaughn bvaughn Oct 9, 2017

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Probably not. (We actually need to clean up index.md, see #97)

I would try maybe temporarily rendering a placeholder into the container from the Home template.

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@renanpvaz renanpvaz Oct 9, 2017

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So you mean that I should use ReactDOM.render like mountCodeExample does?

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@bvaughn bvaughn Oct 9, 2017

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Probably 😄

}

render() {
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22 changes: 22 additions & 0 deletions src/utils/loadScript.js
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@@ -0,0 +1,22 @@
/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/

'use strict';

export default url =>
new Promise((resolve, reject) =>
document.head.appendChild(
Object.assign(document.createElement('script'), {
async: true,
src: url,
onload: resolve,
onerror: reject,
}),
),
);