gulp打包報錯 “Error: Unhandled 'error' event at new JS_Parse_Error”

報錯信息如下：
原因在於gulp打包時未將es6語法轉爲es5

1.首先在項目下進行安裝gulp的babel轉碼

npm install --save-dev gulp-babel babel-core babel-preset-es2015 

2.此時在gulp壓縮配置文件內添加如下babel

var gulp = require('gulp'),
    babel = require("gulp-babel");

gulp.task('minjs', function () {
    gulp.src(src_js+'/**/*.js')
        .pipe(babel())
        .pipe(uglify())
        .pipe(gulp.dest(dest_js));
});

3.再次執行gulp即可