CSS不能算是嚴(yán)格意義的編程語言，但是在前端體系中卻不能小覷。 CSS 是以描述為主的樣式表，如果描述得混亂、沒有規(guī)則，對(duì)于其他開發(fā)者一定是一個(gè)定時(shí)炸彈，特別是有強(qiáng)迫癥的人群。CSS 看似簡單，想要寫出漂亮的 CSS 還是相當(dāng)困難。所以校驗(yàn) CSS 規(guī)則的行動(dòng)迫在眉睫。stylelint是一個(gè)強(qiáng)大的現(xiàn)代 CSS 檢測器，可以讓開發(fā)者在樣式表中遵循一致的約定和避免錯(cuò)誤。本文將詳細(xì)介紹CSS代碼檢查工具stylelint

概述

stylelint擁有超過150條的規(guī)則，包括捕捉錯(cuò)誤、最佳實(shí)踐、控制可以使用的語言特性和強(qiáng)制代碼風(fēng)格規(guī)范。它支持最新的CSS語法，并且靈活可配置

Vue

下面在Vue框架下安裝使用stylelint

1、安裝stylelint、stylint-config-standard和stylelint-order

npm install stylelint --save-devnpm install stylelint-config-standard --save-devnpm install stylelint-order --save-dev

其中，stylelint是運(yùn)行工具，stylelint-config-standard是stylelint的推薦配置，stylelint-order是CSS屬性排序插件

安裝完成后，package.json文件中會(huì)自動(dòng)添加如下字段

"stylelint": "^9.1.3","stylelint-config-standard": "^18.2.0","stylelint-order": "^0.8.1",

2、在根目錄下創(chuàng)建.stylelintrc配置文件

{ "extends": "stylelint-config-standard", "plugins": ["stylelint-order"],"rules": {"order/order": ["declarations","custom-properties","dollar-variables","rules","at-rules"],"order/properties-order": ["position","z-index",   "top","bottom","left",     "right","float","clear","columns","columns-width","columns-count","column-rule","column-rule-width","column-rule-style","column-rule-color","column-fill","column-span","column-gap",   "display","grid","grid-template-rows","grid-template-columns","grid-template-areas","grid-auto-rows","grid-auto-columns","grid-auto-flow","grid-column-gap","grid-row-gap","grid-template","grid-template-rows","grid-template-columns","grid-template-areas","grid-gap","grid-row-gap","grid-column-gap","grid-area","grid-row-start","grid-row-end","grid-column-start","grid-column-end","grid-column","grid-column-start","grid-column-end","grid-row","grid-row-start","grid-row-end",   "flex","flex-grow","flex-shrink","flex-basis","flex-flow","flex-direction","flex-wrap","justify-content","align-content","align-items","align-self","order","table-layout","empty-cells","caption-side","border-collapse","border-spacing","list-style","list-style-type","list-style-position","list-style-image","ruby-align","ruby-merge","ruby-position","box-sizing","width","min-width","max-width","height","min-height","max-height","padding","padding-top","padding-right","padding-bottom","padding-left","margin","margin-top","margin-right","margin-bottom","margin-left",   "border","border-width","border-top-width","border-right-width","border-bottom-width","border-left-width","border-style","border-top-style","border-right-style","border-bottom-style","border-left-style","border-color","border-top-color","border-right-color","border-bottom-color","border-left-color","border-image","border-image-source","border-image-slice","border-image-width","border-image-outset","border-image-repeat","border-top","border-top-width","border-top-style","border-top-color","border-top","border-right-width","border-right-style","border-right-color","border-bottom","border-bottom-width","border-bottom-style","border-bottom-color","border-left","border-left-width","border-left-style","border-left-color","border-radius","border-top-right-radius","border-bottom-right-radius","border-bottom-left-radius","border-top-left-radius","outline","outline-width","outline-color","outline-style","outline-offset","overflow","overflow-x","overflow-y","resize","visibility","font","font-style","font-variant","font-weight","font-stretch","font-size","font-family","font-synthesis","font-size-adjust","font-kerning",    "line-height","text-align","text-align-last","vertical-align",   "text-overflow","text-justify","text-transform","text-indent","text-emphasis","text-emphasis-style","text-emphasis-color","text-emphasis-position","text-decoration","text-decoration-color","text-decoration-style","text-decoration-line","text-underline-position","text-shadow",   "white-space","overflow-wrap","word-wrap","word-break","line-break","hyphens","letter-spacing","word-spacing","quotes","tab-size","orphans","writing-mode","text-combine-upright","unicode-bidi","text-orientation","direction","text-rendering","font-feature-settings","font-language-override","image-rendering","image-orientation","image-resolution","shape-image-threshold","shape-outside","shape-margin","color","background","background-image","background-position","background-size","background-repeat","background-origin","background-clip","background-attachment","background-color","background-blend-mode","isolation","clip-path","mask","mask-image","mask-mode","mask-position","mask-size","mask-repeat","mask-origin","mask-clip","mask-composite","mask-type","filter","box-shadow","opacity","transform-style","transform","transform-box","transform-origin","perspective","perspective-origin","backface-visibility","transition","transition-property","transition-duration","transition-timing-function","transition-delay","animation","animation-name","animation-duration","animation-timing-function","animation-delay","animation-iteration-count","animation-direction","animation-fill-mode","animation-play-state","scroll-behavior","scroll-snap-type","scroll-snap-destination","scroll-snap-coordinate","cursor","touch-action","caret-color","ime-mode","object-fit","object-position","content","counter-reset","counter-increment","will-change","pointer-events","all","page-break-before","page-break-after","page-break-inside","widows"],  "no-empty-source": null,"property-no-vendor-prefix": [true, {"ignoreProperties": ["background-clip"]}],"number-leading-zero": "never","number-no-trailing-zeros": true,"length-zero-no-unit": true,"value-list-comma-space-after": "always","declaration-colon-space-after": "always","value-list-max-empty-lines": 0,"shorthand-property-no-redundant-values": true,"declaration-block-no-duplicate-properties": true,"declaration-block-no-redundant-longhand-properties": true,"declaration-block-semicolon-newline-after": "always","block-closing-brace-newline-after": "always","media-feature-colon-space-after": "always","media-feature-range-operator-space-after": "always","at-rule-name-space-after": "always","indentation": 2,"no-eol-whitespace": true,"string-no-newline": null}}

3、使用stylelint驗(yàn)證CSS代碼即可，如驗(yàn)證src目錄下的所有vue文件

react

react中使用styled-components來書寫CSS代碼，stylelint同樣提供了插件來校驗(yàn)CSS

1、安裝stylelint、stylelint-processor-styled-components、stylelint-config-styled-components、stylelint-config-recommend、stylelint-order

npm install --save-dev stylelint@9.1.3npm install --save-dev stylelint-processor-styled-componentsnpm install --save-dev stylelint-config-styled-componentsnpm install --save-dev stylelint-config-recommendednpm install --save-dev stylelint-order

注意： 由于stylelint更新到9.2版本后，導(dǎo)致styled-components中的CSS代碼無法正常校驗(yàn)，所以穩(wěn)妥起見，使用9.1.3版本的

2、在根目錄下新建配置文件.stylelintrc

{"processors": ["stylelint-processor-styled-components"],"extends": ["stylelint-config-recommended","stylelint-config-styled-components"],"plugins": ["stylelint-order"],"rules": {"order/order": ["declarations","custom-properties","dollar-variables","rules","at-rules"],...}

3、同樣地，使用stylelint命令即可校驗(yàn)

注意事項(xiàng)

1、fix命令

在stylelint的150多條規(guī)則中，使用fix命令，可以自動(dòng)修復(fù)一些命令。但是，該fix命令一定要慎用。筆者在使用fix命令后，stylelint將React工程中的所有js文件里的代碼全部清除，只留著了下可以識(shí)別的css部分

stylelint "**/*.js" --fix

2、配置scripts

可以在package.json中配置stylelint的快捷方式

"scripts": {"lintcss": "stylelint "src/**/*.js""}

這樣，使用npm run lintcss 命令即可實(shí)現(xiàn)相同效果

3、如果提示如下錯(cuò)誤

Error: No configuration provided for

是因?yàn)樵诟窂较聸]有發(fā)現(xiàn)配置文件，如.stylelintrc

更多關(guān)于CSS代碼檢查工具stylelint的使用方法請(qǐng)查看下面的相關(guān)鏈接