feat: allow string type z-index

src/number-keyboard/README.md

@@ -141,7 +141,7 @@ Use `title` prop to set keyboard title
 | title | Keyboard title | *string* | - |
 | maxlength `v2.0.2` | Value maxlength | *string \| number* | - |
 | transition | Whether to show transition animation | *boolean* | `true` |
-| z-index | Keyboard z-index | *number* | `100` |
+| z-index | Keyboard z-index | *string \| number* | `100` |
 | extra-key | Content of bottom left key | *string* | `''` |
 | close-button-text | Close button text | *string* | `-` |
 | delete-button-text | Delete button text | *string* | `delete` |

src/number-keyboard/README.zh-CN.md

@@ -147,7 +147,7 @@ export default {
 | title | 键盘标题 | *string* | - |
 | maxlength `v2.0.2` | 输入值最大长度 | *string \| number* | - |
 | transition | 是否开启过场动画 | *boolean* | `true` |
-| z-index | 键盘 z-index | *number* | `100` |
+| z-index | 键盘 z-index | *string \| number* | `100` |
 | extra-key | 左下角按键内容 | *string* | `''` |
 | close-button-text | 关闭按钮文字，空则不展示 | *string* | `-` |
 | delete-button-text | 删除按钮文字 | *string* | `删除` |

src/number-keyboard/index.js

@@ -24,7 +24,7 @@ export default createComponent({
   props: {
     show: Boolean,
     title: String,
-    zIndex: Number,
+    zIndex: [Number, String],
     closeButtonText: String,
     deleteButtonText: String,
     theme: {