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Turn on Babel helpers #5093

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merged 14 commits into from
Sep 25, 2018
Merged

Turn on Babel helpers #5093

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775387a
Turn on helpers and test importing something with async/await works
Timer Sep 25, 2018
ca2777f
Compiling babel runtime breaks itself
Timer Sep 25, 2018
b86f9bd
Add helpers option to babel plugin with defaults
Timer Sep 25, 2018
937d786
Make helpers off by default and on in our configuration
Timer Sep 25, 2018
b74852a
Hit eject and e2e
Timer Sep 25, 2018
3cdbbfe
meh
Timer Sep 25, 2018
3dbc5f8
copy'n'paste
Timer Sep 25, 2018
2b06e8b
change again
Timer Sep 25, 2018
8ef839d
Turn off helpers by default in /prod, /dev, /test
Timer Sep 25, 2018
55a605b
oops
Timer Sep 25, 2018
071aa4f
Spread undefined
Timer Sep 25, 2018
82c82f8
Use object assign not object spread
Timer Sep 25, 2018
a404acc
Put preset in template since it's needed
Timer Sep 25, 2018
5bb2ee2
Fix e2e tests
Timer Sep 25, 2018
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3 changes: 2 additions & 1 deletion packages/babel-preset-react-app/create.js
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ module.exports = function(api, opts, env) {
var isEnvProduction = env === 'production';
var isEnvTest = env === 'test';
var isFlowEnabled = validateBoolOption('flow', opts.flow, true);
var areHelpersEnabled = validateBoolOption('helpers', opts.helpers, true);
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Wait, shouldn't default be false?

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This is the non-dependency version.

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Ah it's for app code. Hmm.

Would it break these instructions?

https://reactjs.org/docs/add-react-to-a-website.html#run-jsx-preprocessor

If so I think it should still be off by default.

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See https://github.com/facebook/create-react-app/pull/5093/files#diff-e4eb38a3161bed144100754a3e97763dR26

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Right but I don't want this to break non-commonjs usage.

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Or maybe we should have a separate entry point for "standalone" usage.


if (!isEnvDevelopment && !isEnvProduction && !isEnvTest) {
throw new Error(
Expand Down Expand Up @@ -113,7 +114,7 @@ module.exports = function(api, opts, env) {
require('@babel/plugin-transform-runtime').default,
{
corejs: false,
helpers: false,
helpers: areHelpersEnabled,
regenerator: true,
// https://babeljs.io/docs/en/babel-plugin-transform-runtime#useesmodules
// We should turn this on once the lowest version of Node LTS
Expand Down
15 changes: 14 additions & 1 deletion packages/babel-preset-react-app/dependencies.js
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Expand Up @@ -6,6 +6,18 @@
*/
'use strict';

const validateBoolOption = (name, value, defaultValue) => {
if (typeof value === 'undefined') {
value = defaultValue;
}

if (typeof value !== 'boolean') {
throw new Error(`Preset react-app: '${name}' option must be a boolean.`);
}

return value;
};

module.exports = function(api, opts) {
if (!opts) {
opts = {};
Expand All @@ -21,6 +33,7 @@ module.exports = function(api, opts) {
var isEnvDevelopment = env === 'development';
var isEnvProduction = env === 'production';
var isEnvTest = env === 'test';
var areHelpersEnabled = validateBoolOption('helpers', opts.helpers, false);
if (!isEnvDevelopment && !isEnvProduction && !isEnvTest) {
throw new Error(
'Using `babel-preset-react-app` requires that you specify `NODE_ENV` or ' +
Expand Down Expand Up @@ -76,7 +89,7 @@ module.exports = function(api, opts) {
require('@babel/plugin-transform-runtime').default,
{
corejs: false,
helpers: false,
helpers: areHelpersEnabled,
regenerator: true,
// https://babeljs.io/docs/en/babel-plugin-transform-runtime#useesmodules
// We should turn this on once the lowest version of Node LTS
Expand Down
2 changes: 1 addition & 1 deletion packages/babel-preset-react-app/dev.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,5 +9,5 @@
const create = require('./create');

module.exports = function(api, opts) {
return create(api, opts, 'development');
return create(api, Object.assign({ helpers: false }, opts), 'development');
};
2 changes: 1 addition & 1 deletion packages/babel-preset-react-app/prod.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,5 +9,5 @@
const create = require('./create');

module.exports = function(api, opts) {
return create(api, opts, 'production');
return create(api, Object.assign({ helpers: false }, opts), 'production');
};
2 changes: 1 addition & 1 deletion packages/babel-preset-react-app/test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,5 +9,5 @@
const create = require('./create');

module.exports = function(api, opts) {
return create(api, opts, 'test');
return create(api, Object.assign({ helpers: false }, opts), 'test');
};
5 changes: 4 additions & 1 deletion packages/react-error-overlay/webpack.config.iframe.js
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Expand Up @@ -32,12 +32,15 @@ module.exports = {
// Dependencies
{
test: /\.js$/,
exclude: /@babel\/runtime/,
use: {
loader: 'babel-loader',
options: {
babelrc: false,
compact: false,
presets: ['babel-preset-react-app/dependencies'],
presets: [
['babel-preset-react-app/dependencies', { helpers: true }],
],
},
},
},
Expand Down
6 changes: 5 additions & 1 deletion packages/react-scripts/config/webpack.config.dev.js
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Expand Up @@ -275,6 +275,7 @@ module.exports = {
// Unlike the application JS, we only compile the standard ES features.
{
test: /\.js$/,
exclude: /@babel\/runtime/,
use: [
// This loader parallelizes code compilation, it is optional but
// improves compile time on larger projects
Expand All @@ -290,7 +291,10 @@ module.exports = {
babelrc: false,
compact: false,
presets: [
require.resolve('babel-preset-react-app/dependencies'),
[
require.resolve('babel-preset-react-app/dependencies'),
{ helpers: true },
],
],
cacheDirectory: true,
// Don't waste time on Gzipping the cache
Expand Down
6 changes: 5 additions & 1 deletion packages/react-scripts/config/webpack.config.prod.js
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Expand Up @@ -314,6 +314,7 @@ module.exports = {
// Unlike the application JS, we only compile the standard ES features.
{
test: /\.js$/,
exclude: /@babel\/runtime/,
use: [
// This loader parallelizes code compilation, it is optional but
// improves compile time on larger projects
Expand All @@ -324,7 +325,10 @@ module.exports = {
babelrc: false,
compact: false,
presets: [
require.resolve('babel-preset-react-app/dependencies'),
[
require.resolve('babel-preset-react-app/dependencies'),
{ helpers: true },
],
],
cacheDirectory: true,
// Save disk space when time isn't as important
Expand Down
4 changes: 2 additions & 2 deletions tasks/e2e-kitchensink.sh
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Expand Up @@ -146,8 +146,8 @@ PORT=3001 \
nohup yarn start &>$tmp_server_log &
grep -q 'You can now view' <(tail -f $tmp_server_log)

# Before running Mocha, specify that it should use our preset
# TODO: this is very hacky and we should find some other solution
# We haven't ejected yet which means there's no `babel` key
# in package.json yet
echo '{"presets":["react-app"]}' > .babelrc
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Can we just put it in our jest integration config or something? Why does it have to be at the root?

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I dunno what's best, but during eject we add it to package.json. Will file follow up issue.

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I just mean that in this case we only need it for integration test itself. So it's unrelated to our app and I'd like it to stay unrelated (if that makes sense)

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That makes sense. We'll figure something out.


# Test "development" environment
Expand Down