Gulp usage

npm install gulp
npm install gulp-cli -g
gulp-htmlmin html compression
gulp-csso css compression
gulp-babel JS syntax conversion
gulp-less less syntax conversion css
gulp-uglify compression obfuscation JS
gulp-file-include public file includes
browsersync browser Synchronize

// Create gulpfile.js file
// src source file directory, file directory after dist reconstruction

//gulp.src () Get the file to be processed by the task
//gule.dest () Output file
//gule.task () Create the gulp task
/// gulp.watch () Monitor file changes

const gulp = require("gulp");
//任务命名为first
gulp.task("first", () => {
	//获取要处理的文件
	gulp
		.src("./src/css/a.css")
		//.pipe(引入模块的变量名())
		//拷贝输出文件
		.pipe(gulp.dest("./dist/css"));
});