#鸿蒙通关秘籍#在HarmonyOS中如何通过Napi调用自定义ArkTS接口？

namespace ObjectUtil {
    export function isNull(obj) {
        return obj === null;
    }
    export function isUndefined(obj) {
        return obj === undefined;
    }
    export function isNullOrUndefined(obj) {
        return isNull(obj) || isUndefined(obj);
    }
    export function toString(obj, defaultValue = '') {
        if (this.isNullOrUndefined(obj)) {
            return defaultValue;
        } else {
            return obj.toString();
        }
    }
}
export default ObjectUtil;
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"arkOptions": {
    "runtimeOnly": {
        "sources": [
        './src/main/ets/common/ObjectUtil.ts',
        ],
        "packages": [
        ]
    }
},
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static napi_value GetNativeModule(napi_env env, const char *modulePath, const char *key) {
    napi_value module;
    napi_load_module(env, modulePath, &module);

    napi_value outputObject = nullptr;
    napi_get_named_property(env, module, key, &outputObject);
    return outputObject;
}
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static napi_status CallIsNullFun(napi_env env, napi_value inputObject) {
    const char moduleName[] = "/ets/common/ObjectUtil";
    const char funcName[] = "isNull";
    napi_value isNullFun = GetNativeModule(env, moduleName, funcName);

    napi_value inputArgs[1] = inputObject;
    napi_value result;
    napi_call_function(env, nullptr, isNullFun, 1, inputArgs, &result);
    return result;
}
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