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Defer babel loading #100

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Merged
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/components/CodeEditor/CodeEditor.js
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Expand Up @@ -130,7 +130,6 @@ class CodeEditor extends Component {
[media.lessThan('medium')]: {
marginBottom: '0 !important',
},


'& pre.prism-code[contenteditable]': {
outline: 0,
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1 change: 0 additions & 1 deletion src/html.js
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Expand Up @@ -19,7 +19,6 @@ 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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3 changes: 2 additions & 1 deletion src/site-constants.js
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Expand Up @@ -11,5 +11,6 @@
// 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};
28 changes: 24 additions & 4 deletions src/templates/home.js
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Expand Up @@ -15,13 +15,23 @@ 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';
import ReactDOM from 'react-dom';

class Home extends Component {
componentDidMount() {
mountCodeExample('helloExample', HELLO_COMPONENT);
mountCodeExample('timerExample', TIMER_COMPONENT);
mountCodeExample('todoExample', TODO_COMPONENT);
mountCodeExample('markdownExample', MARKDOWN_COMPONENT);
renderExamplePlaceholder('helloExample');
renderExamplePlaceholder('timerExample');
renderExamplePlaceholder('todoExample');
renderExamplePlaceholder('markdownExample');

loadScript(babelURL).then(() => {
mountCodeExample('helloExample', HELLO_COMPONENT);
mountCodeExample('timerExample', TIMER_COMPONENT);
mountCodeExample('todoExample', TODO_COMPONENT);
mountCodeExample('markdownExample', MARKDOWN_COMPONENT);
});
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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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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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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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So you mean that I should use ReactDOM.render like mountCodeExample does?

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Probably 😄

}

render() {
Expand Down Expand Up @@ -163,6 +173,16 @@ Home.propTypes = {
location: PropTypes.object.isRequired,
};

// TODO Improve this temporarily placeholder as part of
// converting the home page from markdown template to a Gatsby
// page (see issue #2)
function renderExamplePlaceholder(containerId) {
ReactDOM.render(
<h4>Loading code example...</h4>,
document.getElementById(containerId),
);
}

const CtaItem = ({children, primary = false}) => (
<div
css={{
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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,
}),
),
);