diff --git a/src/editor/init-fns/bind-event.ts b/src/editor/init-fns/bind-event.ts
index 0b04226..b198303 100644
--- a/src/editor/init-fns/bind-event.ts
+++ b/src/editor/init-fns/bind-event.ts
@@ -45,7 +45,7 @@ function _bindChange(editor: Editor): void {
         compositionEnd && change(editor)
     })
     $toolbarElem.on('click', () => {
-        change()
+        change(editor)
     })
 }
 
diff --git a/src/menus/link/create-panel-conf.ts b/src/menus/link/create-panel-conf.ts
index 76d0c79..dbe3d43 100644
--- a/src/menus/link/create-panel-conf.ts
+++ b/src/menus/link/create-panel-conf.ts
@@ -6,7 +6,7 @@
 import editor from '../../editor/index'
 import { PanelConf } from '../menu-constructors/Panel'
 import { getRandom } from '../../utils/util'
-import $ from '../../utils/dom-core'
+import $, { DomElement } from '../../utils/dom-core'
 import isActive from './is-active'
 
 export default function (editor: editor, text: string, link: string): PanelConf {
@@ -19,13 +19,36 @@ export default function (editor: editor, text: string, link: string): PanelConf
     // 是否显示“删除链接”
     const delBtnDisplay = isActive(editor) ? 'inline-block' : 'none'
 
+    let $selectedLink: DomElement
+
+    /**
+     * 选中整个链接元素
+     */
+    function selectLinkElem(): void {
+        if (!isActive(editor)) return
+
+        const $linkElem = editor.selection.getSelectionContainerElem()
+        if (!$linkElem) return
+        editor.selection.createRangeByElem($linkElem)
+        editor.selection.restoreSelection()
+
+        $selectedLink = $linkElem // 赋值给函数内全局变量
+    }
+
     /**
      * 插入链接
      * @param text 文字
      * @param link 链接
      */
     function insertLink(text: string, link: string): void {
-        editor.cmd.do('insertHTML', `<a href="${link}" target="_blank">${text}</a>`)
+        if (isActive(editor)) {
+            // 选区处于链接中，则选中整个菜单，再执行 insertHTML
+            selectLinkElem()
+            editor.cmd.do('insertHTML', `<a href="${link}" target="_blank">${text}</a>`)
+        } else {
+            // 选区未处于链接中，直接插入即可
+            editor.cmd.do('insertHTML', `<a href="${link}" target="_blank">${text}</a>`)
+        }
     }
 
     /**
@@ -35,11 +58,10 @@ export default function (editor: editor, text: string, link: string): PanelConf
         if (!isActive(editor)) {
             return
         }
-        const $selectionELem = editor.selection.getSelectionContainerElem()
-        if (!$selectionELem) {
-            return
-        }
-        const selectionText = editor.selection.getSelectionText()
+        // 选中整个链接
+        selectLinkElem()
+        // 用文本替换链接
+        const selectionText = $selectedLink.text()
         editor.cmd.do('insertHTML', '<span>' + selectionText + '</span>')
     }
 
@@ -71,8 +93,14 @@ export default function (editor: editor, text: string, link: string): PanelConf
                             // 执行插入链接
                             const $link = $('#' + inputLinkId)
                             const $text = $('#' + inputTextId)
-                            const link = $link.val()
-                            const text = $text.val()
+                            let link = $link.val().trim()
+                            let text = $text.val().trim()
+
+                            // 链接为空，则不插入
+                            if (!link) return
+                            // 文本为空，则用链接代替
+                            if (!text) text = link
+
                             insertLink(text, link)
 
                             // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
diff --git a/src/menus/link/index.ts b/src/menus/link/index.ts
index 1b452d5..ac91b2d 100644
--- a/src/menus/link/index.ts
+++ b/src/menus/link/index.ts
@@ -30,9 +30,9 @@ class Link extends PanelMenu implements MenuActive {
             if (!$linkElem) {
                 return
             }
-            // 将该元素都包含在选取之内，以便后面整体替换
-            editor.selection.createRangeByElem($linkElem)
-            editor.selection.restoreSelection()
+
+            // 弹出 panel
+            this.createPanel($linkElem.text(), $linkElem.attr('href'))
         } else {
             // 菜单未被激活，说明选区不在链接里
             if (editor.selection.isSelectionEmpty()) {
diff --git a/test/fns/command-mock.ts b/test/fns/command-mock.ts
index 728fe6b..a2cddb3 100644
--- a/test/fns/command-mock.ts
+++ b/test/fns/command-mock.ts
@@ -4,7 +4,17 @@
  */
 
 export default function (document: Document) {
+    /**
+     * 说明：
+     * document.execCommand 赋值为一个空函数，这是因为 jest 本身不支持 document.execCommand ，所以只能这样模拟。
+     * 所以，执行这个命令，如 document.execCommand('bold')，是**不会**像浏览器一样实现加粗的。
+     *
+     * 但是，有一个例外情况需要注意，就是 editor.cmd.do('insertHTML', xx) ！！！
+     * 根据 src/editor/command.ts 的代码逻辑，在 jest 中执行 editor.cmd.do('insertHTML', xx) 最终会走到 `range.insertNode($(html).elems[0])` 这一行
+     * 所以，可以执行成功
+     */
     document.execCommand = jest.fn()
+
     document.queryCommandValue = jest.fn()
     document.queryCommandState = jest.fn()
     document.queryCommandSupported = jest.fn()
diff --git a/test/menus/link.test.ts b/test/menus/link.test.ts
index a1dfd57..bb86b18 100644
--- a/test/menus/link.test.ts
+++ b/test/menus/link.test.ts
@@ -40,6 +40,7 @@ test('link 菜单：插入链接', () => {
     $inputLink.val(link)
     $btnInsert.click()
 
+    // 此处触发 editor.cmd.do('insertHTML', xx)，可以被 jest 成功执行，具体参考 mockCmdFn 的描述
     expect(
         editor.$textElem.html().indexOf(`<a href="${link}" target="_blank">${text}</a>`)
     ).toBeGreaterThan(0)