feat: add ssrId option for rendering ssr id on client

* add data-vue-ssr-id for client hydration

* Update addStylesClient.js

Author: cyij

Diff for: index.js

@@ -35,11 +35,12 @@ module.exports.pitch = function (remainingRequest) {
     'if(content.locals) module.exports = content.locals;'
   ]
 
+  var options = loaderUtils.getOptions(this)
   if (!isServer) {
     // on the client: dynamic inject + hot-reload
     var code = [
       '// add the styles to the DOM',
-      'var update = require(' + addStylesClientPath + ')(' + id + ', content, ' + isProduction + ');'
+      'var update = require(' + addStylesClientPath + ')(' + id + ', content, ' + isProduction + ', ' + JSON.stringify(options) + ');'
     ]
     if (!isProduction) {
       code = code.concat([

Diff for: lib/addStylesClient.js

@@ -42,14 +42,18 @@ var singletonElement = null
 var singletonCounter = 0
 var isProduction = false
 var noop = function () {}
+var options = null
+var ssrIdKey = 'data-vue-ssr-id'
 
 // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>
 // tags it will allow on a page
 var isOldIE = typeof navigator !== 'undefined' && /msie [6-9]\b/.test(navigator.userAgent.toLowerCase())
 
-module.exports = function (parentId, list, _isProduction) {
+module.exports = function (parentId, list, _isProduction, _options) {
   isProduction = _isProduction
 
+  options = _options || {}
+
   var styles = listToStyles(parentId, list)
   addStylesToDom(styles)
 
@@ -113,7 +117,7 @@ function createStyleElement () {
 
 function addStyle (obj /* StyleObjectPart */) {
   var update, remove
-  var styleElement = document.querySelector('style[data-vue-ssr-id~="' + obj.id + '"]')
+  var styleElement = document.querySelector('style[' + ssrIdKey + '~="' + obj.id + '"]')
 
   if (styleElement) {
     if (isProduction) {
@@ -195,6 +199,9 @@ function applyToTag (styleElement, obj) {
   if (media) {
     styleElement.setAttribute('media', media)
   }
+  if (options.ssrId) {
+    styleElement.setAttribute(ssridKey, obj.id)
+  }
 
   if (sourceMap) {
     // https://developer.chrome.com/devtools/docs/javascript-debugging