Babel Stage-X

都怪自己眼瞎，辣么绿的一块都木看仔细

结果就是很悲催，网上找了一通，不行。连 babel-polyfill 都试了，回头再看一遍，Sogo， So easy！

var babel = require('gulp-babel')
gulp.src("./ES7/Exponentiation/demo.js")
        .pipe(babel({presets: ["stage-1"]}))
        .pipe(gulp.dest("./ES7/Exponentiation/dist"));
​

但是但是，好不容易到了终点，居然有 bug： Issue #26 · babel/babylon

具体代码可见： https://github.com/Vanessa219/emulation/tree/master/ES7/Exponentiation

顺带贴一下 ECMAScript 每个阶段的说明

The TC39 categorises proposals into 4 stages:

• stage-0 - Strawman: just an idea, possible Babel plugin.
• stage-1 - Proposal: this is worth working on.
• stage-2 - Draft: initial spec.
• stage-3 - Candidate: complete spec and initial browser implementations.
• stage-4 - Finished: will be added to the next yearly release.
  Also check out the current tc39 proposals and its process document.