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vue-dict

vue-dict是一个vue深入订制的字典集工具,有多种使用方式,方便开发者使用

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Rollup.js 下一代的 ES6 模块打包机

在我们模块化项目时,经常调用一个模块,使用了其中一个方法,其它 N 多的方法我们未调用,我们希望未调用到的方法或者变量忽略它们,并且不打包到 js 文件中,这样在大项目里面可以显著减少文件的体积,特别在移动终端,虽然 4G 非常快,但是我还是希望更省流量。

ES6 帮我们实现了,目前 webpackbrowserify 都还不支持这一屌爆了的功能。如果你现在就想实现这一功能的话,你就可以尝试使用rollup.js

使用方法

使用gulp工具来搞定打包功能。首先在根目录建立gulpfile.jspackage.json 文件这个是 gulp 工具的标配。如果不知道怎么玩儿gulp,得先去研究研究

先安装依赖模块

npm install gulp --save
npm install rollup --save
npm install rollup-plugin-commonjs --save
npm install rollup-plugin-node-resolve --save

gulpfile.js

var gulp = require("gulp");
var fs = require("fs");
var rollup = require("rollup").rollup;
var commonjs = require("rollup-plugin-commonjs");
var nodeResolve = require("rollup-plugin-node-resolve");

gulp.task("script", function () {
    return rollup({
        entry: "src/main.js",
        plugins: [nodeResolve({ jsnext: true }), commonjs()],
    }).then(function (bundle) {
        // 输出 bundle + sourcemap
        var result = bundle.generate({
            // output format - 'amd', 'cjs', 'es6', 'iife', 'umd'
            // amd – 使用像requirejs一样的银木块定义
            // cjs – CommonJS,适用于node和browserify / Webpack
            // es6 (default) – 保持ES6的格式
            // iife – 使用于<script> 标签引用的方式
            // umd – 适用于CommonJs和AMD风格通用模式
            /**
             * output format - 'amd', 'cjs', 'es6', 'iife', 'umd'
             * amd – 使用像requirejs一样的银木块定义
             * cjs – CommonJS,适用于node和browserify / Webpack
             * es6 (default) – 保持ES6的格式
             * iife – 使用于<script> 标签引用的方式
             * umd – 适用于CommonJs和AMD风格通用模式
             */
            format: "cjs",
        });

        fs.writeFileSync("bundle.js", result.code);

        bundle.write({
            format: "cjs",
            dest: "dist/main.js",
        });
    });
});

再去建立 main.jsmain.js ,运行 npm script 进行打包,就可得到你想要的 js 文件了。

rollup 插件

Plugins: https://github.com/rollup/rollup/wiki/Plugins

  • babel – transpile code with Babel
  • browserify-transform – use Browserify transforms as plugins
  • coffee-script – convert CoffeeScript to JS
  • commonjs – convert CommonJS modules to ES6
  • eslint - verify entry and imported scripts
  • includepaths – provide base paths to resolve imports from
  • inject – detect dependencies and inject them
  • istanbul – Instruments code for code coverage with Istanbul
  • json – convert JSON to ES6
  • memory - load entry from memory
  • multi-entry – allows multiple 'entry points' instead of just one
  • node-resolve – use the Node.js module resolution algorithm (e.g. modules from node_modules, installed with npm)
  • pegjs - import PEG.js grammars as parsers
  • postcss - compile postcss and insert to head
  • ractive – precompile Ractive components
  • replace – replace occurrences of a set of strings
  • riot - compile Riot.js tag file
  • string – import text files as strings
  • stylus-css-modules – compile Stylus and inject CSS modules
  • uglify - minify generated bundle
  • vue - compile vue components

参考资料

官网:http://rollupjs.org
Github:https://github.com/rollup/rollup

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Package last updated on 15 Oct 2020

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