fix: Updated regex to capture the negative sign

application/source/dom/dimension.mjs

@@ -74,7 +74,7 @@ function getDeviceDPI() {
  */
 
 function convertToPixels(value, parentElement = document.documentElement, fontSizeElement = document.documentElement) {
-    const regex = /^([\d.]+)(.*)$/;
+    const regex = /^(-?[\d.]+)(.*)$/;
     const matchResult = value.match(regex);
 
     if (!matchResult) {
@@ -82,7 +82,6 @@ function convertToPixels(value, parentElement = document.documentElement, fontSi
     }
 
     const [, num, unit] = matchResult;
-    
     const number = parseFloat(num);
     const dpi = getDeviceDPI();
 

development/test/cases/dom/dimension.mjs

@@ -71,6 +71,15 @@ describe('dimension', () => {
             expect(errorFn).to.throw(Error, `Invalid value format: ${invalidValue}`);
         });
 
+        it("should handle negative values correctly", () => {
+            const negativeValue = "-10px";
+            const expectedResult = -10;
+
+            const result = convertToPixels(negativeValue);
+
+            expect(result).to.equal(expectedResult);
+        });
+
         it('should correctly convert em values', () => {
             const testElement = document.createElement('div');
             testElement.style.fontSize = '16px';