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18 changes: 12 additions & 6 deletions packages/react-scripts/config/env.js
Original file line number Diff line number Diff line change
Expand Up @@ -19,21 +19,27 @@ function getClientEnvironment(publicUrl) {
.keys(process.env)
.filter(key => REACT_APP.test(key))
.reduce((env, key) => {
env[key] = JSON.stringify(process.env[key]);
env[key] = process.env[key];
return env;
}, {
// Useful for determining whether we’re running in production mode.
// Most importantly, it switches React into the correct mode.
'NODE_ENV': JSON.stringify(
process.env.NODE_ENV || 'development'
),
'NODE_ENV': process.env.NODE_ENV || 'development',
// Useful for resolving the correct path to static assets in `public`.
// For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
// This should only be used as an escape hatch. Normally you would put
// images into the `src` and `import` them in code to get their paths.
'PUBLIC_URL': JSON.stringify(publicUrl)
'PUBLIC_URL': publicUrl
});
return {'process.env': processEnv};

processEnv['process.env'] = Object

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Why do you stringify in a second step now? Seems like unnecessary complication to me.

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As @gaearon explanation, We need to stringify values into strings such that we could use process.env.X in js code.

I have changed some code for more explicitly.

.keys(processEnv)
.reduce((env, key) => {
env[key] = JSON.stringify(processEnv[key]);
return env;
}, {});

return processEnv;
}

module.exports = getClientEnvironment;
4 changes: 1 addition & 3 deletions packages/react-scripts/config/webpack.config.dev.js
Original file line number Diff line number Diff line change
Expand Up @@ -205,9 +205,7 @@ module.exports = {
// Makes the public URL available as %PUBLIC_URL% in index.html, e.g.:
// <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
// In development, this will be an empty string.
new InterpolateHtmlPlugin({
PUBLIC_URL: publicUrl
}),
new InterpolateHtmlPlugin(env),

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Could you please update the comment to reflect the new behavior?

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Fixed in 5763d44

// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin({
inject: true,
Expand Down
4 changes: 1 addition & 3 deletions packages/react-scripts/config/webpack.config.prod.js
Original file line number Diff line number Diff line change
Expand Up @@ -218,9 +218,7 @@ module.exports = {
// <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
// In production, it will be an empty string unless you specify "homepage"
// in `package.json`, in which case it will be the pathname of that URL.
new InterpolateHtmlPlugin({
PUBLIC_URL: publicUrl
}),
new InterpolateHtmlPlugin(env),

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This comment as well.

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Fixed in 5763d44

// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin({
inject: true,
Expand Down