64 lines
1.4 KiB
JavaScript
64 lines
1.4 KiB
JavaScript
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow strict-local
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*/
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'use strict';
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const invariant = require('invariant');
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function processAspectRatio(aspectRatio?: number | string): ?number {
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if (typeof aspectRatio === 'number') {
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return aspectRatio;
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}
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if (typeof aspectRatio !== 'string') {
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if (__DEV__) {
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invariant(
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!aspectRatio,
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'aspectRatio must either be a number, a ratio string or `auto`. You passed: %s',
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aspectRatio,
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);
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}
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return;
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}
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const matches = aspectRatio.split('/').map(s => s.trim());
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if (matches.includes('auto')) {
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if (__DEV__) {
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invariant(
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matches.length,
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'aspectRatio does not support `auto <ratio>`. You passed: %s',
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aspectRatio,
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);
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}
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return;
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}
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const hasNonNumericValues = matches.some(n => Number.isNaN(Number(n)));
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if (__DEV__) {
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invariant(
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!hasNonNumericValues && (matches.length === 1 || matches.length === 2),
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'aspectRatio must either be a number, a ratio string or `auto`. You passed: %s',
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aspectRatio,
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);
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}
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if (hasNonNumericValues) {
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return;
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}
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if (matches.length === 2) {
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return Number(matches[0]) / Number(matches[1]);
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}
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return Number(matches[0]);
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}
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module.exports = processAspectRatio;
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