javascript - 执行gulp提示JSX错误

Question

执行gulp, 提示错误:

[15:56:31] Using gulpfile ~/snapterest/gulpfile.js
[15:56:31] Starting 'default'...
events.js:154
      throw er; // Unhandled 'error' event
      ^

SyntaxError: /Users/yonghuming/snapterest/source/app.js: Unexpected token (4:16)
  2 | var ReactDOM = require('react-dom');
  3 | var Application = require('./components/Application.react');
> 4 | ReactDOM.render(<Application />, document.getElementById('react-application'));
    |                 ^
  5 |
  6 |
  7 |
    at Parser.pp.raise (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:1375:13)
    at Parser.pp.unexpected (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:2813:8)
    at Parser.pp.parseExprAtom (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:747:12)
    at Parser.pp.parseExprSubscripts (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:502:19)
    at Parser.pp.parseMaybeUnary (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:482:19)
    at Parser.pp.parseExprOps (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:413:19)
    at Parser.pp.parseMaybeConditional (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:395:19)
    at Parser.pp.parseMaybeAssign (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:358:19)
    at Parser.pp.parseExprListItem (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:1204:16)
    at Parser.pp.parseCallExpressionArguments (/Users/yonghuming/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/index.js:578:20)

gulpfile.js文件内容

var gulp = require('gulp');
var browserify = require('browserify');
var babelify = require('babelify');
var source = require('vinyl-source-stream');

gulp.task('default', function(){
    // console.log('I am about to learn the essentials of React.js');
    return browserify('./source/app.js')
           .transform(babelify)
           .bundle()
           .pipe(source('snapterest.js'))
           .pipe(gulp.dest('./build/'));
});

Answer 1

如果是 Babel 6 的话, 需要配置 preset

$ npm install --save-dev babel-preset-es2015 babel-preset-react

browserify('./source/app.js')
  .transform('babelify', {presets: ['es2015', 'react']})
  .bundle()
  .pipe(source('snapterest.js'))
  .pipe(gulp.dest('./build/'));

或者配置.babelrc

{
  "presets": ["es2015", "react"]
}