first commit

历届学生/王凯/18-11-23/gulpfile.js

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+var gulp = require('gulp');
+var babel = require("gulp-babel");
+var watch = require('gulp-watch');
+
+
+gulp.task('babel', function () {
+  return watch('src/**/*.js', function () {
+      gulp
+      .src('src/**/*.js')
+      .pipe(babel())
+      .pipe(gulp.dest('dist/'));
+  });
+});