[其它]gulp 4 插件gulp-babel的使用

"devDependencies": {
    "gulp-babel": "^8.0.0",
    "@babel/core": "^7.4.3",
    "@babel/preset-env": "^7.4.3",
}

const babel = require("gulp-babel");
gulp.task("babelJS",function () {
    return gulp.src("./src/public/js/ajaxFn.js")
        .pipe(babel({
            presets:['@babel/preset-env']
        }))
        .pipe(uglify())
        .pipe(gulp.dest("./dist/public/js"))
})