markdown 后端为前端导出变量

Posted 2021-05-05

### Template engine:
Usually, we place it in script section of footer.
```js
<script type="application/json" data-from-backend>
    {
      "product_id": "{{ product.id }}",
      "user_address": "{{ userAddress }}"
    }
</script>
```


### JS code:
```js
const jsonObj = JSON.parse($('[data-from-backend]').html());
```