fix: slice check

src/libs/translator.js

@@ -430,9 +430,14 @@ export class Translator {
   }
 
   #getDocDescription() {
+    try {
       const meta = document.querySelector('meta[name="description"]');
       const description = meta ? meta.getAttribute("content") : "";
       return description.slice(0, 200);
+    } catch (err) {
+      kissLog("get description", err);
+    }
+    return "";
   }
 
   // 监控翻译单元的可见性

src/libs/utils.js

@@ -198,6 +198,8 @@ export const isSameSet = (a, b) => {
  * @returns
  */
 export const removeEndchar = (s, c, count = 1) => {
+  if (!s) return "";
+
   let i = s.length;
   while (i > s.length - count && s[i - 1] === c) {
     i--;