From 2b21ae8f8eacef8fa5dd1c962bf5eb72d51f3910 Mon Sep 17 00:00:00 2001
From: shengxinjing <316783812@qq.com>
Date: Sat, 2 May 2020 11:17:00 +0800
Subject: [PATCH] refactor(shared): replace switch with config in escapeHtml

---
 packages/shared/src/escapeHtml.ts | 42 +++++++++++++------------------
 1 file changed, 17 insertions(+), 25 deletions(-)

diff --git a/packages/shared/src/escapeHtml.ts b/packages/shared/src/escapeHtml.ts
index 4a6435e6a51..8b849233ca7 100644
--- a/packages/shared/src/escapeHtml.ts
+++ b/packages/shared/src/escapeHtml.ts
@@ -12,33 +12,25 @@ export function escapeHtml(string: unknown) {
   let escaped: string
   let index: number
   let lastIndex = 0
+  const codeToEscapes:any = {
+    34:'&quot;', // "
+    38:'&amp;', // &
+    39:'&#39;', // '
+    60:'&lt;', // <
+    62:'&gt;'  // >
+  }
   for (index = match.index; index < str.length; index++) {
-    switch (str.charCodeAt(index)) {
-      case 34: // "
-        escaped = '&quot;'
-        break
-      case 38: // &
-        escaped = '&amp;'
-        break
-      case 39: // '
-        escaped = '&#39;'
-        break
-      case 60: // <
-        escaped = '&lt;'
-        break
-      case 62: // >
-        escaped = '&gt;'
-        break
-      default:
-        continue
-    }
-
-    if (lastIndex !== index) {
-      html += str.substring(lastIndex, index)
+    const code = str.charCodeAt(index)
+
+    if(codeToEscapes[code]){
+      escaped = codeToEscapes[code]
+      if (lastIndex !== index) {
+        html += str.substring(lastIndex, index)
+      }
+  
+      lastIndex = index + 1
+      html += escaped
     }
-
-    lastIndex = index + 1
-    html += escaped
   }
 
   return lastIndex !== index ? html + str.substring(lastIndex, index) : html