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gulp-usels

v1.0.5

Published

a front-end build system that use localstorage to cache files

Downloads

5

Readme

gulp-usels

A front-end build system that use localstorage to cache res

gulp-usels是什么?

gulp-usels(gulp-use-localstorage)是一个前端构建工具,类似于gulp-useref, 可以同lsrequire.js结合使用,从而做到基于localstorage的缓存

gulp-usels能做什么?

  • 通过特点语法解析页面中jscss的引用
  • 将引用的jscss进行合并、注入
  • 自带版本控制,基于md5文件重命名,缓存控制更科学,更简单
  • 结合lsrequire.js,可以做到用localstorage本地缓存js甚至css文件,提高缓存命中率,节省浏览,极大减少请求数
  • 基于gulp,RPY,自由搭配各种工具如uglifyjs、cssmin、imagemin等等

gulp-usels怎么用?

var gulp = require('gulp')
var gulpif = require('gulp-if')
var uglify = require('gulp-uglify')
var cssmin = require('gulp-cssmin')
var usels = require('gulp-usels')
var prefix = {
        "{{res}}": "../res",
        '//geekie.online': '../res'
}
gulp.task('test',function(){
    gulp.src('./src/website/**/*.html')
        .pipe(usels(prefix))
        //.pipe(gulpif('*.js',uglify()))
        //.pipe(gulpif('*.css',cssmin()))
        .pipe(gulp.dest('./dist/website'))
        .pipe(usels.rewrite())
        .pipe(gulp.dest('./dist/website'))
})

API

usels(prefix)

var usels = require('gulp-usels')
var prefix = {
        "{{res}}": "../res",
        '//geekie.online': '../res'
}
gulp.task('test',function(){
    gulp.src('./src/website/**/*.html')
        .pipe(usels(prefix))
        //stream流过的时候,通过gulpif判断类型
        //可以做压缩处理
        //.pipe(gulpif('*.js',uglify()))
        //.pipe(gulpif('*.css',cssmin()))
        .pipe(gulp.dest('./dist/website'))
        //如果用到了@path模式,需要重写path中的引用文件
        //以适配lsrequire.js
        .pipe(usels.rewrite())
        .pipe(gulp.dest('./dist/website'))
})

prefix

prefix是一个key-value对象,用来对路径中的全局变量,域名等特殊字符做处理

key为路径中要替换的文本 value为相对于gulp构建时base的实际路径

比如有些文件在开发时并不是都放在web站点的根目录下,例如cdn,那么可以自定义前缀,让gulp-usels在编译时将此类特殊变量(如域名,后台模板的变量)转义成指定目录。

gulp-usels语法说明

说明

[],表示变量

解析标识块

<!--@start-->
<!--@end-->

<!--@start--><!--@end-->中的内容,会被gulp-usels解析

编译目标语言

<!--@compile:[param]-->

表示代码块内的内容,是那种语言,[param]可以是jscss

合并文件

<!--@file:[file]-->

代码块内的引用文件,会合并为[file]的指定文件

例子

<!--@start-->
<!--@compile: js-->
<!--@file: /static/js/concat.js-->
<script src="/static/js/file1.js"></script>
<script src="/static/js/file2.js"></script>
<script src="/static/js/file3.js"></script>
<!--@end-->

编译后输出为

<script src="/static/js/concat.[md5].js"></script>

注入文件

<!--@inject: true-->

代码块内的引用文件,会合并并注入到html中

path模式(适配lsrequire.js)

<!--@base: [base]-->
<!--@ignore: [path to ignore]-->
<!--@path: [path]-->

例子

源码

<!--@start-->
<!--@compile: js-->
<!--@base: //blog.geekie.online-->
<!--@ignore: /static/js/-->
<!--@path: js-->
<script type="text/javascript" src="/static/js/test-path/test-path-1.js"></script>
<script type="text/javascript" src="/static/js/test-path/test-path-2.js"></script>
<script type="text/javascript" src="/static/js/test-path/test-path-3.js"></script>
    <!--@start-->
    <!--@compile: js-->
    <!--@file: //blog.geekie.online/js/test-path-file-combo.js-->
    <script type="text/javascript" src="{{res}}/js/test-path/test-path-file-1.js"></script>
    <script type="text/javascript" src="{{res}}/js/test-path/test-path-file-2.js"></script>
    <!--@end-->
<!--@end-->

输出后

<script type='text/javascript'>
if(typeof __require__ == 'undefined'){
    var __require__ = {
        requireArray:[],
        config: function(param){
            this.requireArray.push(param)
        }
    }
}
__require__.config({
    baseUrl: '//blog.geekie.online',
    deps: {"js/test-path/test-path-1.js":"11a942de37","js/test-path/test-path-2.js":"6a371c9354","js/test-path/test-path-3.js":"60d8df8802","js/test-path-file-combo.js":"3bc8b5d5ec"},
})
</script>

代码块内的文件,输出到path的指定路径

@base

path块中,包裹的js或css将会输出到指定路径的根目录

@base可以匹配prefix中的规则,输出到指定路径

@path

path块中,包裹的js或css将会输出到从@base指定的根目录出发的 相对路径

举例 prefix: { "//blog.geekie.online": "[glob]" }

@base: //blog.geekie.online

@path: js/foojs/

此时,文件将输出到[glob]/js

@ignore

@path中的src的路径将会被忽略的部分 举例 @ignore: /static,那么@path中的src如 src="/static/js/foo.js"在编译时将会忽略/static

结合之前的例子,那么脚本将会被输出到 [glob]/js/foojs/js/foo.js

嵌套

@path中可以嵌套@path@file

# 路线图

  • 支持amd规范(有可能会支持cmd、commonjs规范)
  • 支持prefix配置绝对路径(目前还只支持相对于gulp.dist目录的相对路径)
  • ...