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24 lines
926 B
24 lines
926 B
///
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/// Copyright © 2016-2024 The Thingsboard Authors
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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import { UntypedFormArray, ValidatorFn } from '@angular/forms';
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export function validateArrayIsNotEmpty(): ValidatorFn {
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return (formArray: UntypedFormArray): { formArrayIsEmpty: boolean } => {
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const length = formArray.length;
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return length ? null : { formArrayIsEmpty: true };
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};
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}
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