fix: casing

Author: bartveneman

src/destructure-line-height.test.ts

@@ -33,6 +33,8 @@ test('lengths with spec-compliant units', () => {
 	expect.soft(destructure_line_height('1.1px')).toEqual({ value: 1.1, unit: 'px' })
 	expect.soft(destructure_line_height('100px')).toEqual({ value: 100, unit: 'px' })
 	expect.soft(destructure_line_height('1e2rem')).toEqual({ value: 100, unit: 'rem' })
+	expect.soft(destructure_line_height('1REM')).toEqual({ value: 1, unit: 'rem' })
+	expect.soft(destructure_line_height('1PX')).toEqual({ value: 1, unit: 'px' })
 })
 
 test('lenghts with unsupported units', () => {

src/destructure-line-height.ts

@@ -23,10 +23,11 @@ export function destructure_line_height(value: string): Length | number | null {
 			if (value === 0) {
 				return 0
 			}
-			if (ALLOWED_UNITS.has(maybe_dimension.unit)) {
+			let unit = maybe_dimension.unit.toLowerCase()
+			if (ALLOWED_UNITS.has(unit)) {
 				return {
 					value,
-					unit: maybe_dimension.unit as Unit,
+					unit: unit as Unit,
 				}
 			}
 			return null