用r.js来打包模块化的js文件实例讲解
前面的话
r.js(下载)是requireJS的优化(Optimizer)工具,可以实现前端文件的压缩与合并,在requireJS异步按需加载的基础上进一步提供前端优化,减小前端文件大小、减少对服务器的文件请求。本文将详细介绍r.js
简单打包
【项目结构】
以一个简单的例子来说明r.js的使用。该项目名称为'demo',在js目录下包含s1.js和s2.js两个文件,使用requirejs进行模块化,内容如下
//s1.jsdefine(function (){return 1; })//s2.jsdefine(function (){return 2; })
使用main.js来调用s1.js和s2.js这两个文件
require(['s1','s2'], function(a,b){ console.log(a+b); });
index.html的内容如下
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script data-main="js/main" src="js/require.js?1.1.11"></script> </head> <body> </body> </html>
运行index.html文件,所依赖资源如下图所示

【打包】
接下来,使用r.js来对javascript文件进行打包,而r.js需要使用build.js文件来进行配置,配置如下
({ baseUrl: "./", name:'main', out:'out.js'})
接下来运行node r.js -o build.js命令

项目根目录下,生成一个out.js文件,内容如下
define("s1",[],function(){return 1}),define("s2",[],function(){return 2}),require(["s1","s2"],function(n,e){console.log(n+e)}),define("main",function(){});
将index.html的入口文件修改为'out.js',文件依然能正常运行
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script data-main="js/out" src="js/require.js?1.1.11"></script> </head> <body> </body> </html>
jQuery打包
一般地,我们并不是使用原生javascript进行开发,更多的使用库进行高效开发,以jQuery为例,对上面的代码进行改造
s1模块和s2模块,分别基于jQuery来获取页面div元素的宽、高,内容如下
//s1.jsdefine(['../common/jquery'],function (){return $('div').height(); })//s2.jsdefine(['../common/jquery'],function (){return $('div').width(); })
项目结构如下所示,js文件夹包括common和module两个子文件夹,common文件夹包含公用的require.js和jquery.js,module文件夹包含模块s1.js和s2.js。页面的根目录下,有index.html、入口文件main.js、以及r.js和build.js

【包含jQuery】
如果打包后的main.js要包含jQuery.js,则代码如下所示
({ appDir: './', //项目根目录dir: './dist', //输出目录,全部文件打包后要放入的文件夹(如果没有会自动新建的)baseUrl:'./', modules: [ //要优化的模块,相对baseUrl的路径,也是省略后缀“.js”{ name:'main' } ], fileExclusionRegExp: /^(r|build)\.js|.*\.scss$/, //过滤,匹配到的文件将不会被输出到输出目录去optimizeCss: 'standard', removeCombined: true //如果为true,将从输出目录中删除已合并的文件})
打包后的main.js内容如下所示


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0,t.target||(t.target=r),n=null==n?[t]:ge.makeArray(n,[t]),f=ge.event.special[d]||{},i||!f.trigger||f.trigger.apply(r,n)!==!1)){if(!i&&!f.noBubble&&!ge.isWindow(r)){for(u=f.delegateType||d,Et.test(u+d)||(a=a.parentNode);a;a=a.parentNode)p.push(a),s=a;s===(r.ownerDocument||ne)&&p.push(s.defaultView||s.parentWindow||e)}for(o=0;(a=p[o++])&&!t.isPropagationStopped();)t.type=o>1?u:f.bindType||d,c=(Pe.get(a,"events")||{})[t.type]&&Pe.get(a,"handle"),c&&c.apply(a,n),c=l&&a[l],c&&c.apply&&Oe(a)&&(t.result=c.apply(a,n),t.result===!1&&t.preventDefault());return t.type=d,i||t.isDefaultPrevented()||f._default&&f._default.apply(p.pop(),n)!==!1||!Oe(r)||l&&ge.isFunction(r[d])&&!ge.isWindow(r)&&(s=r[l],s&&(r[l]=null),ge.event.triggered=d,r[d](),ge.event.triggered=void 0,s&&(r[l]=s)),t.result}},simulate:function(e,t,n){var r=ge.extend(new ge.Event,n,{type:e,isSimulated:!0});ge.event.trigger(r,null,t)}}),ge.fn.extend({trigger:function(e,t){return this.each(function(){ge.event.trigger(e,t,this)})},triggerHandler:function(e,t){var n=this[0];if(n)return ge.event.trigger(e,t,n,!0)}}),ge.each("blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu".split(" "),function(e,t){ge.fn[t]=function(e,n){return arguments.length>0?this.on(t,null,e,n):this.trigger(t)}}),ge.fn.extend({hover:function(e,t){return this.mouseenter(e).mouseleave(t||e)}}),de.focusin="onfocusin"in e,de.focusin||ge.each({focus:"focusin",blur:"focusout"},function(e,t){var n=function(e){ge.event.simulate(t,e.target,ge.event.fix(e))};ge.event.special[t]={setup:function(){var r=this.ownerDocument||this,i=Pe.access(r,t);i||r.addEventListener(e,n,!0),Pe.access(r,t,(i||0)+1)},teardown:function(){var r=this.ownerDocument||this,i=Pe.access(r,t)-1;i?Pe.access(r,t,i):(r.removeEventListener(e,n,!0),Pe.remove(r,t))}}});var 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【不包含jQuery】
如果其他页面也需要用到jQuery,它们打包的时候,也会把jQuery打包。这样,相当于每个页面都打包了一次jQuery,性能很差。更好的做法是,不打包jQuery,其他页面引用jQuery时,就可以使用缓存了。
build.js内容如下所示
({ appDir: './', //项目根目录dir: './dist', //输出目录,全部文件打包后要放入的文件夹(如果没有会自动新建的)baseUrl:'./', modules: [ //要优化的模块,相对baseUrl的路径,也是省略后缀“.js” { name:'main', exclude: ['js/common/jquery']//不打包jQuery } ], fileExclusionRegExp: /^(r|build)\.js|.*\.scss$/, //过滤,匹配到的文件将不会被输出到输出目录去optimizeCss: 'standard', removeCombined: true //如果为true,将从输出目录中删除已合并的文件})
接下来运行node r.js -o build.js命令

运行后,生成一个'dist'文件夹,该文件夹包含的文件都是处理过后的文件,适合上线

打包后的main.js内容如下所示
define("js/module/s1",["../common/jquery"],function(){return $("div").height()}),define("js/module/s2",["../common/jquery"],function(){return $("div").width()}),require(["js/module/s1","js/module/s2"],function(e,n){console.log(parseInt(e)+parseInt(n))}),define("main",function(){});
Atas ialah kandungan terperinci 用r.js来打包模块化的js文件实例讲解. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!

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foobar2000 ialah perisian yang boleh mendengar sumber muzik pada bila-bila masa Ia membawakan anda semua jenis muzik dengan kualiti bunyi tanpa kehilangan Versi pemain muzik yang dipertingkatkan membolehkan anda mendapatkan pengalaman muzik yang lebih komprehensif dan selesa mainkan audio lanjutan pada komputer Peranti dipindahkan ke telefon mudah alih untuk memberikan pengalaman main balik muzik yang lebih mudah dan cekap Reka bentuk antara muka adalah ringkas, jelas dan mudah digunakan Ia menggunakan gaya reka bentuk minimalis tanpa terlalu banyak hiasan dan operasi yang menyusahkan untuk bermula dengan cepat. Ia juga menyokong pelbagai kulit dan Tema, memperibadikan tetapan mengikut pilihan anda sendiri, dan mencipta pemain muzik eksklusif yang menyokong main balik berbilang format audio. Ia juga menyokong fungsi perolehan audio untuk melaraskan kelantangan kepada keadaan pendengaran anda sendiri untuk mengelakkan kerosakan pendengaran yang disebabkan oleh kelantangan yang berlebihan. Seterusnya, izinkan saya membantu anda

NetEase Mailbox, sebagai alamat e-mel yang digunakan secara meluas oleh netizen Cina, sentiasa memenangi kepercayaan pengguna dengan perkhidmatannya yang stabil dan cekap. NetEase Mailbox Master ialah perisian e-mel yang dicipta khas untuk pengguna telefon mudah alih. Ia sangat memudahkan proses menghantar dan menerima e-mel dan menjadikan pemprosesan e-mel kami lebih mudah. Jadi bagaimana untuk menggunakan NetEase Mailbox Master, dan apakah fungsi khusus yang ada di bawah, editor tapak ini akan memberi anda pengenalan terperinci, dengan harapan dapat membantu anda. Mula-mula, anda boleh mencari dan memuat turun aplikasi NetEase Mailbox Master di gedung aplikasi mudah alih. Cari "Induk Peti Mel NetEase" dalam App Store atau Baidu Mobile Assistant, dan kemudian ikut gesaan untuk memasangnya. Selepas muat turun dan pemasangan selesai, kami membuka akaun e-mel NetEase dan log masuk. Antara muka log masuk adalah seperti yang ditunjukkan di bawah

Storan awan telah menjadi bahagian yang amat diperlukan dalam kehidupan dan kerja harian kita pada masa kini. Sebagai salah satu perkhidmatan storan awan terkemuka di China, Baidu Netdisk telah memenangi hati sebilangan besar pengguna dengan fungsi storan yang berkuasa, kelajuan penghantaran yang cekap dan pengalaman operasi yang mudah. Dan sama ada anda ingin menyandarkan fail penting, berkongsi maklumat, menonton video dalam talian atau mendengar muzik, Baidu Cloud Disk boleh memenuhi keperluan anda. Walau bagaimanapun, ramai pengguna mungkin tidak memahami penggunaan khusus aplikasi Baidu Netdisk, jadi tutorial ini akan memperkenalkan anda tentang cara menggunakan aplikasi Baidu Netdisk secara terperinci Jika anda masih keliru, sila ikuti artikel ini untuk mengetahui lebih lanjut! Cara menggunakan Cakera Rangkaian Awan Baidu: 1. Pemasangan Mula-mula, semasa memuat turun dan memasang perisian Baidu Cloud, sila pilih pilihan pemasangan tersuai.

MetaMask (juga dipanggil Little Fox Wallet dalam bahasa Cina) ialah perisian dompet penyulitan percuma dan diterima baik. Pada masa ini, BTCC menyokong pengikatan pada dompet MetaMask Selepas mengikat, anda boleh menggunakan dompet MetaMask untuk log masuk dengan cepat, menyimpan nilai, membeli syiling, dsb., dan anda juga boleh mendapatkan bonus percubaan 20 USDT untuk pengikatan pertama. Dalam tutorial dompet BTCCMetaMask, kami akan memperkenalkan secara terperinci cara mendaftar dan menggunakan MetaMask, dan cara mengikat dan menggunakan dompet Little Fox dalam BTCC. Apakah dompet MetaMask? Dengan lebih 30 juta pengguna, MetaMask Little Fox Wallet ialah salah satu dompet mata wang kripto yang paling popular hari ini. Ia percuma untuk digunakan dan boleh dipasang pada rangkaian sebagai sambungan

Teknologi pengesanan dan pengecaman muka adalah teknologi yang agak matang dan digunakan secara meluas. Pada masa ini, bahasa aplikasi Internet yang paling banyak digunakan ialah JS Melaksanakan pengesanan muka dan pengecaman pada bahagian hadapan Web mempunyai kelebihan dan kekurangan berbanding dengan pengecaman muka bahagian belakang. Kelebihan termasuk mengurangkan interaksi rangkaian dan pengecaman masa nyata, yang sangat memendekkan masa menunggu pengguna dan meningkatkan pengalaman pengguna termasuk: terhad oleh saiz model, ketepatannya juga terhad. Bagaimana untuk menggunakan js untuk melaksanakan pengesanan muka di web? Untuk melaksanakan pengecaman muka di Web, anda perlu biasa dengan bahasa dan teknologi pengaturcaraan yang berkaitan, seperti JavaScript, HTML, CSS, WebRTC, dll. Pada masa yang sama, anda juga perlu menguasai visi komputer yang berkaitan dan teknologi kecerdasan buatan. Perlu diingat bahawa kerana reka bentuk bahagian Web

Selepas lama menekan butang main pembesar suara, sambungkan ke wifi dalam perisian dan anda boleh menggunakannya. Tutorial Model Berkenaan: Xiaomi 12 Sistem: EMUI11.0 Versi: Xiaoai Classmate 2.4.21 Analisis 1 Mula-mula cari butang main pembesar suara, dan tekan dan tahan untuk memasuki mod pengedaran rangkaian. 2 Log masuk ke akaun Xiaomi anda dalam perisian Xiaoai Speaker pada telefon anda dan klik untuk menambah Speaker Xiaoai baharu. 3. Selepas memasukkan nama dan kata laluan wifi, anda boleh menghubungi Xiao Ai untuk menggunakannya. Tambahan: Apakah fungsi yang ada pada Xiaoai Speaker 1 Xiaoai Speaker mempunyai fungsi sistem, fungsi sosial, fungsi hiburan, fungsi pengetahuan, fungsi kehidupan, rumah pintar dan rancangan latihan. Ringkasan/Nota: Apl Xiao Ai mesti dipasang pada telefon mudah alih anda terlebih dahulu untuk sambungan dan penggunaan yang mudah.

Apple melancarkan kemas kini iOS 17.4 pada hari Selasa, membawakan pelbagai ciri dan pembaikan baharu kepada iPhone. Kemas kini termasuk emoji baharu, dan pengguna EU juga boleh memuat turunnya daripada kedai aplikasi lain. Di samping itu, kemas kini juga mengukuhkan kawalan keselamatan iPhone dan memperkenalkan lebih banyak pilihan tetapan "Perlindungan Peranti Dicuri" untuk menyediakan pengguna dengan lebih banyak pilihan dan perlindungan. "iOS17.3 memperkenalkan fungsi "Perlindungan Peranti Dicuri" buat kali pertama, menambahkan keselamatan tambahan kepada maklumat sensitif pengguna. Apabila pengguna berada jauh dari rumah dan tempat biasa lain, fungsi ini memerlukan pengguna memasukkan maklumat biometrik untuk pertama kali masa, dan selepas satu jam Anda mesti memasukkan maklumat sekali lagi untuk mengakses dan menukar data tertentu, seperti menukar kata laluan Apple ID anda atau mematikan perlindungan peranti yang dicuri.
