series和 paralle

series 串行執行任務

特性：等待慢的一塊兒輸出

const { series } = require('gulp');

function javascript(cb) {
  // body omitted
  cb();
}

function css(cb) {
  // body omitted
  cb();
}

exports.build = series(javascript, css);

paralle 並行執行任務

const { parallel } = require('gulp');

function javascript(cb) {
  // body omitted
  cb();
}

function css(cb) {
  // body omitted
  cb();
}

exports.build = parallel(javascript, css);

優勢

避免重複任務

運行組合操做時，每次提供時都會執行每一個任務

若是你有這樣的代碼

const { series, parallel } = require('gulp');

const clean = function(cb) {
  // body omitted
  cb();
};

const css = series(clean, function(cb) {
  // body omitted
  cb();
});

const javascript = series(clean, function(cb) {
  // body omitted
  cb();
});

exports.build = parallel(css, javascript);

改良後

const { series, parallel } = require('gulp');

function clean(cb) {
  // body omitted
  cb();
}

function css(cb) {
  // body omitted
  cb();
}

function javascript(cb) {
  // body omitted
  cb();
}

exports.build = series(clean, parallel(css, javascript));

詳情參考網址

https://gulpjs.com/docs/en/api/parallel