harmony 鸿蒙SysCap

2023-06-24
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SysCap

SystemCapability (SysCap) refers to a standalone feature in the operating system. Different devices support different SysCap sets. Each SysCap corresponds to one or more APIs. You can determine whether an API can be used by checking SysCap support.

NOTE

The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.

canIUse

canIUse(syscap: string): boolean

Checks whether a SysCap is supported.

System capability: SystemCapability.ArkUI.ArkUI.Full

Parameters

Name	Type	Mandatory	Description
syscap	string	Yes	Name of the SysCap to check.

Return value

Type	Description
boolean	Check result. The value true means that the SysCap is supported, and false means the opposite.

Example

import geoLocationManager from '@ohos.geoLocationManager'
import { BusinessError } from '@ohos.base';

const isLocationAvailable = canIUse('SystemCapability.Location.Location.Core');
if (isLocationAvailable) {
    geoLocationManager.getCurrentLocation((err: BusinessError, location: geoLocationManager.Location) => {
        if (err) {
            console.log('err=' + JSON.stringify(err));
        }
        if (location) {
            console.log('location=' + JSON.stringify(location));
        }
    });
} else {
    console.log('Location not by this device.');
}