message: [Doc] add props name style guide
diff: @@ -58,3 +58,15 @@ Vue.use(Vant);
  <!-- import script -->
  <script src="https://unpkg.com/vant/lib/vant.min.js"></script>
  ```
  +
  +### Props Named Style
  +HTML attributes are case-insensitive, so when using non-string templates, camelCased prop names need to use their kebab-case (hyphen-delimited) equivalents.
  +
  +``` html
  +<!-- camelCase in JavaScript -->
  +<van-cell isLink />
  +
  +<!-- kebab-case in HTML -->
  +<van-cell is-link />
  +```
  +
  