scoped.ts — vue Source File

Source Code

import { PluginCreator, Rule, AtRule } from 'postcss'
import selectorParser from 'postcss-selector-parser'

const animationNameRE = /^(-\w+-)?animation-name$/
const animationRE = /^(-\w+-)?animation$/

const scopedPlugin: PluginCreator<string> = (id = '') => {
  const keyframes = Object.create(null)
  const shortId = id.replace(/^data-v-/, '')

  return {
    postcssPlugin: 'vue-sfc-scoped',
    Rule(rule) {
      processRule(id, rule)
    },
    AtRule(node) {
      if (
        /-?keyframes$/.test(node.name) &&
        !node.params.endsWith(`-${shortId}`)
      ) {
        // register keyframes
        keyframes[node.params] = node.params = node.params + '-' + shortId
      }
    },
    OnceExit(root) {
      if (Object.keys(keyframes).length) {
        // If keyframes are found in this <style>, find and rewrite animation names
        // in declarations.
        // Caveat: this only works for keyframes and animation rules in the same
        // <style> element.
        // individual animation-name declaration
        root.walkDecls(decl => {
          if (animationNameRE.test(decl.prop)) {
            decl.value = decl.value
              .split(',')
              .map(v => keyframes[v.trim()] || v.trim())
              .join(',')
          }
          // shorthand
          if (animationRE.test(decl.prop)) {
            decl.value = decl.value
              .split(',')
              .map(v => {
                const vals = v.trim().split(/\s+/)
                const i = vals.findIndex(val => keyframes[val])
                if (i !== -1) {
                  vals.splice(i, 1, keyframes[vals[i]])
                  return vals.join(' ')
                } else {
                  return v
                }
              })
              .join(',')
          }
        })
      }
    }
  }
}

// ... (144 more lines)