fix: 对齐3.1observe()案例代码 (wangdoc#267)

EnochGao · web-flow · commit d9420c305423 · 2024-01-09T09:34:09.000+08:00
diff --git a/docs/dom/mutationobserver.md b/docs/dom/mutationobserver.md
@@ -44,7 +44,7 @@ var observer = new MutationObserver(function (mutations, observer) {
 ```javascript
 var article = document.querySelector('article');
 
-var  options = {
+var options = {
   'childList': true,
   'attributes':true
 } ;
