---
name: "MapContext.getScale"
mode: "api"
versionRequirements:
  - { name: "Base Library", version: "2.21.8" }
title: "MapContext.getScale - 获取当前地图的缩放级别"
---

## MapContext.getScale

> [VERSION] Base Library >= 2.21.8

### Description

Get the current map zoom level

### Parameters

`Params`

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `option` | `GetScaleOption` | Yes | Callback options |

### Return Value

None


### Referenced Types

##### `interface` GetScaleOption

| Property | Type | Description |
| --- | --- | --- |
| `success` | `(result: GetScaleResult) => void` | Callback invoked on successful API call |
| `fail` | `(result: MapFailResult) => void` | Callback on failure |
| `complete` | `() => void` | Callback on complete (success or failure) |

##### `interface` GetScaleResult

| Property | Type | Description |
| --- | --- | --- |
| `scale` | `number` | Zoom level |

##### `interface` MapFailResult

| Property | Type | Description |
| --- | --- | --- |
| `errorCode` | `string` | Error code |
| `errorMsg` | `string` | Error message |


### Examples

#### Get zoom level

```ts
const mapCtx = ty.createMapContext('myMap');
mapCtx.getScale({
  success(res) {
    console.log('Zoom level', res.scale);
  },
});
```