const { src, dest, series } = require("gulp"); const concat = require("gulp-concat"); const watch = require("gulp-watch"); function buildTask() { return src(["src/**/*.js"]).pipe(concat("dec.plugin.demo.js")).pipe(dest("./dist")); } function watchTask() { return watch(["src/**/*.js"], buildTask) } exports.buildTask = buildTask; exports.devTask = series(buildTask, watchTask);