> For the complete documentation index, see [llms.txt](https://docs.webmix.cc/javascript-web/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.webmix.cc/javascript-web/3.-bom-liu-lan-qi-wu-jian-mo-xing/3.3-nei-jian-dan-chu-shi-chuang.md).

# 3.3 內建彈出視窗

## alert()

語法：

```javascript
alert("這是訊息視窗。");
```

例：

{% embed url="<https://codepen.io/carlos411/pen/MWybGdp>" %}

## confirm()

跳出一個詢息詢問視窗，讓使用者按下「OK」或「Cancel」，然後會回傳 true 或 false，語法：

```javascript
var is_confirm = confirm("是否確定要執行？");
```

例：

{% embed url="<https://codepen.io/carlos411/pen/ZEWBogy>" %}