详解vue项目中如何引入全局sass/less变量、function、mixin
让我们考虑下场景:当使用rem/vw开发移动端的时候,你定义了一个px转rem的函数,或者是网站配色的全局变量等,然后到工程里为每个vue文件或者组件@import ‘publicfilename.scss',那得重复做这样的工作很多很多...次,万一这些公用文件目录路径变怎么办呢,哭都来不及,想想都觉得恐怖呀!
宁都网站建设公司创新互联建站,宁都网站设计制作,有大型网站制作公司丰富经验。已为宁都上千家提供企业网站建设服务。企业网站搭建\外贸网站制作要多少钱,请找那个售后服务好的宁都做网站的公司定做!
接下来拯救我们的神器就要登场了---sass-resources-loader,它可以省去重复性的引入,还支持less,postcss等,具体用法如下:
npm install -d sass-resource-loader
首先我们找到项目里build目录,在该目录下找到util.js
更新前util.js代码如下:
'use strict'
const path = require('path')
const config = require('../config')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const packageConfig = require('../package.json')
exports.assetsPath = function (_path) {
const assetsSubDirectory = process.env.NODE_ENV === 'production'
? config.build.assetsSubDirectory
: config.dev.assetsSubDirectory
return path.posix.join(assetsSubDirectory, _path)
}
exports.cssLoaders = function (options) {
options = options || {}
const cssLoader = {
loader: 'css-loader',
options: {
sourceMap: options.sourceMap
}
}
// generate loader string to be used with extract text plugin
function generateLoaders (loader, loaderOptions) {
const loaders = options.usePostCSS ? [cssLoader, postcssLoader] : [cssLoader]
if (loader) {
loaders.push({
loader: loader + '-loader',
options: Object.assign({}, loaderOptions, {
sourceMap: options.sourceMap
})
})
}
// Extract CSS when that option is specified
// (which is the case during production build)
if (options.extract) {
return ExtractTextPlugin.extract({
use: loaders,
fallback: 'vue-style-loader'
})
} else {
return ['vue-style-loader'].concat(loaders)
}
}
// https://vue-loader.vuejs.org/en/configurations/extract-css.html
return {
css: generateLoaders(),
postcss: generateLoaders(),
less: generateLoaders('less'),
sass: generateLoaders('sass', { indentedSyntax: true }),
scss: generateLoaders('sass'),
stylus: generateLoaders('stylus'),
styl: generateLoaders('stylus')
}
}
// Generate loaders for standalone style files (outside of .vue)
exports.styleLoaders = function (options) {
const output = []
const loaders = exports.cssLoaders(options)
for (const extension in loaders) {
const loader = loaders[extension]
output.push({
test: new RegExp('\\.' + extension + '$'),
use: loader
})
}
return output
}
exports.createNotifierCallback = () => {
const notifier = require('node-notifier')
return (severity, errors) => {
if (severity !== 'error') return
const error = errors[0]
const filename = error.file && error.file.split('!').pop()
notifier.notify({
title: packageConfig.name,
message: severity + ': ' + error.name,
subtitle: filename || '',
icon: path.join(__dirname, 'logo.png')
})
}
}
/**
* 增加 hljs 的 classname
*/
exports.wrapCustomClass = function (render) {
return function (...args) {
return render(...args)
.replace('', '')
}
}
/**
* Format HTML string
*/
exports.convertHtml = function (str) {
return str.replace(/()(\w{4});/gi, $0 => String.fromCharCode(parseInt(encodeURIComponent($0).replace(/(%26%23x)(\w{4})(%3B)/g, '$2'), 16)))
}
看util.js文件,我们首先找到我需要修改目标在哪:
// https://vue-loader.vuejs.org/en/configurations/extract-css.html return { css: generateLoaders(), postcss: generateLoaders(), less: generateLoaders('less'), sass: generateLoaders('sass', { indentedSyntax: true }), scss: generateLoaders('sass'), stylus: generateLoaders('stylus'), styl: generateLoaders('stylus') }
我们那sass为例,用sass-resources-loader对其改造:
/** * sass Less 源文件 * @param name classFile * @returns {string} */ function resolveResouce(name) { return path.resolve(__dirname, '../static/' + name); } //导入全局sass mixin function等 function generateSassResourceLoader(){ var loaders = [ cssLoader, //'postcss-loader', 'sass-loader', { loader:'sass-resources-loader', options: { //需要一个全局路径 resources: [resolveResouce('index.scss')] } } ] if(options.extract){ return ExtractTextPlugin.extract({ use:loaders, fallback: 'vue-style-loader' }) }else{ return ['vue-style-loader'].concat(loaders) } }
工具写好好了,接下来直接把上门return对象做些调整,代码如下
// https://vue-loader.vuejs.org/en/configurations/extract-css.html return { css: generateLoaders(), postcss: generateLoaders(), less: generateLoaders('less'), sass:generateSassResourceLoader(), scss:generateSassResourceLoader(), stylus: generateLoaders('stylus'), styl: generateLoaders('stylus') }
从代码中可以看出,我们把sass和scss的loader换成我们自己根据sass-resources-loader写的方法了,这样就实现了我们的目标。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持创新互联。
文章题目:详解vue项目中如何引入全局sass/less变量、function、mixin
网页路径:http://pwwzsj.com/article/jgighj.html