mirror of
https://github.com/status-im/react-native.git
synced 2025-01-10 01:25:39 +00:00
4978855d72
Summary: In javascriptcore(ios9), this code will run as expected(output 0 1):
```js
for(let i=0; i<2; i++) {
const data = i;
console.log(data);
}
```
But when debug in chrome, the above code will fail without `use strict` prologue (if you add prologue, rn will fail with red screen `Const declarations are not supported in strict mode`): https://code.google.com/p/v8/issues/detail?id=4432.
So it's better to transpile contant by default.
Closes https://github.com/facebook/react-native/pull/2955
Reviewed By: @svcscm
Differential Revision: D2483398
Pulled By: @vjeux
78 lines
1.8 KiB
JavaScript
78 lines
1.8 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* Note: This is a fork of the fb-specific transform.js
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*/
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'use strict';
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const babel = require('babel-core');
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const inlineRequires = require('fbjs-scripts/babel/inline-requires');
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function transform(src, filename, options) {
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const plugins = [];
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if (process.env.NODE_ENV === 'production') {
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plugins.push('node-env-inline', 'dunderscore-dev-inline');
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} else if (process.env.NODE_ENV === 'test') {
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plugins.push({
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position: 'after',
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transformer: inlineRequires,
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});
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}
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const result = babel.transform(src, {
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retainLines: true,
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compact: true,
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comments: false,
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filename,
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whitelist: [
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// Keep in sync with packager/react-packager/.babelrc
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'es6.arrowFunctions',
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'es6.blockScoping',
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'es6.classes',
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'es6.constants',
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'es6.destructuring',
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'es6.parameters',
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'es6.properties.computed',
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'es6.properties.shorthand',
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'es6.spread',
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'es6.templateLiterals',
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'es7.asyncFunctions',
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'es7.trailingFunctionCommas',
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'es7.objectRestSpread',
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'flow',
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'react',
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'react.displayName',
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'regenerator',
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],
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plugins,
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sourceFileName: filename,
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sourceMaps: false,
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extra: options || {},
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});
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return {
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code: result.code
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};
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}
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module.exports = function(data, callback) {
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let result;
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try {
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result = transform(data.sourceCode, data.filename);
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} catch (e) {
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callback(e);
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return;
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}
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callback(null, result);
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};
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// export for use in jest
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module.exports.transform = transform;
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