本文整理汇总了TypeScript中postcss.Root类的典型用法代码示例。如果您正苦于以下问题：TypeScript Root类的具体用法？TypeScript Root怎么用？TypeScript Root使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Root类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1:
export default postcss.plugin('trim', () => (css: Root) => {
css.walk(({ type, raws }) => {
if (type === 'rule' || type === 'atrule') {
raws.before = raws.after = '\n'
}
})
})示例2: rewriteSelector
export default postcss.plugin('add-id', (options: any) => (root: Root) => {
const id: string = options
const keyframes = Object.create(null)
root.each(function rewriteSelector (node: any) {
if (!node.selector) {
// handle media queries
if (node.type === 'atrule') {
if (node.name === 'media' || node.name === 'supports') {
node.each(rewriteSelector)
} else if (/-?keyframes$/.test(node.name)) {
// register keyframes
keyframes[node.params] = node.params = node.params + '-' + id
}
}
return
}
node.selector = selectorParser((selectors: any) => {
selectors.each((selector: any) => {
let node = null
selector.each((n: any) => {
// ">>>" combinator
if (n.type === 'combinator' && n.value === '>>>') {
n.value = ' '
n.spaces.before = n.spaces.after = ''
return false
}
// /deep/ alias for >>>, since >>> doesn't work in SASS
if (n.type === 'tag' && n.value === '/deep/') {
const prev = n.prev()
if (prev && prev.type === 'combinator' && prev.value === ' ') {
prev.remove()
}
n.remove()
return false
}
if (n.type !== 'pseudo' && n.type !== 'combinator') {
node = n
}
})
selector.insertAfter(node, selectorParser.attribute({
attribute: id
}))
})
}).processSync(node.selector)
})
// If keyframes are found in this <style>, find and rewrite animation names
// in declarations.
// Caveat: this only works for keyframes and animation rules in the same
// <style> element.
if (Object.keys(keyframes).length) {
root.walkDecls(decl => {
// individual animation-name declaration
if (/^(-\w+-)?animation-name$/.test(decl.prop)) {
decl.value = decl.value.split(',')
.map(v => keyframes[v.trim()] || v.trim())
.join(',')
}
// shorthand
if (/^(-\w+-)?animation$/.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(',')
}
})
}
})