refactor: double escape directly

Author: yyx990803

packages/compiler-sfc/src/script/utils.ts

@@ -121,6 +121,8 @@ export function getEscapedPropName(key: string) {
 
 export const cssVarNameEscapeSymbolsRE = /[ !"#$%&'()*+,./:;<=>?@[\\\]^`{|}~]/g
 
-export function getEscapedCssVarName(key: string) {
-  return key.replace(cssVarNameEscapeSymbolsRE, s => `\\${s}`)
+export function getEscapedCssVarName(key: string, doubleEscape: boolean) {
+  return key.replace(cssVarNameEscapeSymbolsRE, s =>
+    doubleEscape ? `\\\\${s}` : `\\${s}`
+  )
 }

packages/compiler-sfc/src/style/cssVars.ts

@@ -21,21 +21,26 @@ export function genCssVarsFromList(
   isSSR = false
 ): string {
   return `{\n  ${vars
-    .map(key => {
-      const varName = genVarName(id, key, isProd)
-      return `"${isSSR ? `--` : ``}${
-        isSSR && !isProd ? varName.replace(/\\/g, '\\\\') : varName
-      }": (${key})`
-    })
+    .map(
+      key =>
+        `"${isSSR ? `--` : ``}${genVarName(id, key, isProd, isSSR)}": (${key})`
+    )
     .join(',\n  ')}\n}`
 }
 
-function genVarName(id: string, raw: string, isProd: boolean): string {
+function genVarName(
+  id: string,
+  raw: string,
+  isProd: boolean,
+  isSSR = false
+): string {
   if (isProd) {
     return hash(id + raw)
   } else {
     // escape ASCII Punctuation & Symbols
-    return `${id}-${getEscapedCssVarName(raw)}`
+    // #7823 need to double-escape in SSR because the attributes are rendered
+    // into an HTML string
+    return `${id}-${getEscapedCssVarName(raw, isSSR)}`
   }
 }