## UniElement

<!-- CUSTOMTYPEJSON.UniElement.description -->

<!-- CUSTOMTYPEJSON.UniElement.extends -->

<!-- CUSTOMTYPEJSON.UniElement.param -->

### 方法
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<!-- CUSTOMTYPEJSON.UniElement.methods.getNodeId.tutorial -->

<!-- CUSTOMTYPEJSON.UniElement.methods.appendChild.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.setAttribute.name -->

<!-- CUSTOMTYPEJSON.UniElement.methods.setAttribute.description -->

**注意**
setAttribute从HBuilderX 3.93起，调整为只能保存string类型属性值，需要保存其它类型数据请使用dataset属性。

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<!-- CUSTOMTYPEJSON.UniElement.methods.getAttribute.name -->

<!-- CUSTOMTYPEJSON.UniElement.methods.getAttribute.description -->

**注意**
getAttribute返回值从HBuilderX 3.93起，调整为string类型，不要使用此方法获取非string类型的属性值。如有非string需求，请使用对象的点操作符直接访问dateset属性，不通过getAttribute方法。

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<!-- CUSTOMTYPEJSON.UniElement.methods.hasAttribute.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.removeAttribute.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.getBoundingClientRect.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.getBoundingClientRect.tutorial -->

<!-- CUSTOMTYPEJSON.UniElement.methods.getDrawableContext.name -->

<!-- CUSTOMTYPEJSON.UniElement.methods.getDrawableContext.description -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.addEventListener.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.removeEventListener.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.removeChild.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.dispatchEvent.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.scrollTo.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.scrollBy.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.focus.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.blur.name -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.takeSnapshot.name -->

<!-- CUSTOMTYPEJSON.UniElement.methods.takeSnapshot.description -->

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<!-- CUSTOMTYPEJSON.UniElement.methods.takeSnapshot.returnValue -->

<!-- CUSTOMTYPEJSON.UniElement.methods.takeSnapshot.compatibility -->

<!-- CUSTOMTYPEJSON.UniElement.methods.takeSnapshot.tutorial -->


```ts
// 找到需要截图节点
const view = uni.getElementById('snapshot-content')!
// 进行截图
view.takeSnapshot({
    success: function (res) {
        // 打印截图文件临时路径
        console.log(res.tempFilePath)
        uni.showToast({
            title: '截图成功，路径：' + res.tempFilePath,
            icon: "none"
        })
    },
    fail: function (res) {
        console.log(res)
        uni.showToast({
            icon: 'error',
            title: '截图失败'
        })
    }
})
```

完整示例代码参考[hello uni-app x](https://gitcode.net/dcloud/hello-uni-app-x/-/blob/alpha/pages/API/element-takesnapshot/element-takesnapshot.uvue)

* 截图会在应用沙盒目录的cache目录产生临时文件，位置[详见](../api/file-system-spec.md#cache)。
* app端如需主动删除临时文件，使用[uni.getFileSystemManager](../api/get-file-system-manager.md)。
* app端list-view、web-view组件性能优化仅渲染屏幕显示的内容，所以截图仅能截取到当前屏幕展示的内容。