/** * Regular expressions for calculating dimensions */ const unitsSplit = /(-?[0-9.]*[0-9]+[0-9.]*)/g; const unitsTest = /^-?[0-9.]*[0-9]+[0-9.]*$/g; /** * Calculate second dimension when only 1 dimension is set */ export function calculateSize( size: string | number, ratio: number, precision?: number ): string | number { if (ratio === 1) { return size; } precision = precision === void 0 ? 100 : precision; if (typeof size === 'number') { return Math.ceil(size * ratio * precision) / precision; } if (typeof size !== 'string') { return size; } // Split code into sets of strings and numbers const oldParts = size.split(unitsSplit); if (oldParts === null || !oldParts.length) { return size; } const newParts = []; let code = oldParts.shift() as string; let isNumber = unitsTest.test(code as string); // eslint-disable-next-line no-constant-condition while (true) { if (isNumber) { const num = parseFloat(code); if (isNaN(num)) { newParts.push(code); } else { newParts.push(Math.ceil(num * ratio * precision) / precision); } } else { newParts.push(code); } // next code = oldParts.shift() as string; if (code === void 0) { return newParts.join(''); } isNumber = !isNumber; } }