addStylesServer.js
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var listToStyles = require('./listToStyles')
module.exports = function (parentId, list, isProduction) {
if (typeof __VUE_SSR_CONTEXT__ !== 'undefined') {
var context = __VUE_SSR_CONTEXT__
var styles = context._styles
if (!styles) {
styles = context._styles = {}
Object.defineProperty(context, 'styles', {
enumberable: true,
get () {
return (
context._renderedStyles ||
(context._renderedStyles = renderStyles(styles))
)
}
})
}
list = listToStyles(parentId, list)
if (isProduction) {
addStyleProd(styles, list)
} else {
addStyleDev(styles, list)
}
}
}
// In production, render as few style tags as possible.
// (mostly because IE9 has a limit on number of style tags)
function addStyleProd (styles, list) {
for (var i = 0; i < list.length; i++) {
var parts = list[i].parts
for (var j = 0; j < parts.length; j++) {
var part = parts[j]
// group style tags by media types.
var id = part.media || 'default'
var style = styles[id]
if (style) {
style.ids.push(part.id)
style.css += '\n' + part.css
} else {
styles[id] = {
ids: [part.id],
css: part.css,
media: part.media
}
}
}
}
}
// In dev we use individual style tag for each module for hot-reload
// and source maps.
function addStyleDev (styles, list) {
for (var i = 0; i < list.length; i++) {
var parts = list[i].parts
for (var j = 0; j < parts.length; j++) {
var part = parts[j]
styles[part.id] = {
ids: [part.id],
css: part.css,
media: part.media
}
}
}
}
function renderStyles (styles) {
var css = ''
for (var key in styles) {
var style = styles[key]
css += `<style data-vue-ssr-id="${
style.ids.join(' ')
}"${
style.media ? ` media="${style.media}"` : ''
}>${style.css}</style>`
}
return css
}