修复纯文本不能复制的错误

src/components/richtext/rich-edit.vue

@@ -76,12 +76,15 @@ const handleCreated = (editor) => {
 }
 
 const customPaste = (editor, event, callback) => {
-  console.log(event)
+  // console.log(event)
   // 显示蒙版
   loadingShow.value = true
-
   let htmlData = event.clipboardData.getData('text/html') // 获取粘贴的 html
-  console.log(htmlData)
+  // console.log(htmlData)
+  if (htmlData == "") {
+    htmlData = event.clipboardData.getData('text/plain') // 获取粘贴的 html
+    // console.log(htmlData)
+  }
   let rtfData = event.clipboardData.getData('text/rtf') // 获取粘贴的 html
   // console.log('-------------- rtfData --------------', rtfData)