33 lines
754 B
TypeScript
33 lines
754 B
TypeScript
// Handle 16x9, 16:9, 1.78x1, 1.78:1, 1.78
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// Ignore everything else
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const parseOrThrow = (num) => {
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const parsed = parseFloat(num);
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if (isNaN(parsed)) {
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throw new Error(`${num} is not a number`);
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}
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return parsed;
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};
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export default function parseAspectRatio(input: string) {
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if (!input) {
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return null;
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}
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try {
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if (input.endsWith("%")) {
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return { w: 100, h: parseOrThrow(input.substr(0, input.length - 1)) };
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}
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const arr = input.replace(":", "x").split("x");
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if (arr.length === 0) {
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return null;
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}
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return arr.length === 1
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? { w: parseOrThrow(arr[0]), h: 1 }
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: { w: parseOrThrow(arr[0]), h: parseOrThrow(arr[1]) };
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} catch (err: any) {
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// Ignore the error
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}
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return null;
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}
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