用吞噬将es2017缩小

问题描述

嘿，我正在使用uglify-gulp和babel来缩小我的js。它与es2015和es2016非常相称。但是如果我尝试做es2017就会中断。

有谁知道任何解决方法来缩小使用es2017中的新实验性功能的js？

  gulp.src（'build / js / bundled / bundle.js'）
 .pipe（babel（{ 
 compact：false，
预设：[es2017，react]，
 plugins：[transform-decorators-legacy]，
}））
 .pipe（uglify（））
 .pipe（gulp.dest（'build / js / bundled'））; 
  

产生这个错误

  GulpUglifyError：无法缩小JavaScript 
  

如果我将es2017更改为es2015 / es2016它会缩小我没有es2017功能的捆绑套件。但我希望能够使用这些实验性功能并能够缩小我的代码。我认为Uglify不能解析一些ES2015的功能，所以你需要将它们转换成ES5（ es2017 目标Node 5 +）。

通过，特别是预设和插件，您应该能够获得它工作（至少它为我做了，因为我可以通过使用 es2017 来复制类似的Uglify问题）：

<$ p'p> 预设：['es2015'，'es2017'，'react']，
插件：['transform-runtime'，'transform-decorators-legacy'，'transform- class-properties']


Hey guys I'm currently using uglify-gulp with babel to minify my js. And it works great with es2015 and es2016. But it breaks if I try to do es2017.

Does anyone know any workarounds to minify js that is using the new experimental features in es2017?

gulp.src('build/js/bundled/bundle.js')
.pipe(babel({
    compact: false,
    presets: ["es2017", "react"], 
    plugins: ["transform-decorators-legacy"],
}))
.pipe(uglify())
.pipe(gulp.dest('build/js/bundled'));

which generates this error

GulpUglifyError: unable to minify JavaScript

If I change es2017 to es2015/es2016 it will minify my bundles that don't have es2017 features just fine. But I want to be able to use those experimental features and be able to minify my code

解决方案

I think that Uglify can't parse some ES2015 features, so you need to transpile those down to ES5 (es2017 targets Node 5+).

With these webpack instructions, specifically the presets and plugins, you should be able to get it working (at least it did for me, as I could replicate similar Uglify issues by just using es2017):

presets: ['es2015', 'es2017', 'react'],
plugins: ['transform-runtime', 'transform-decorators-legacy', 'transform-class-properties']

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