diff --git a/lib/extract/extractText.js b/lib/extract/extractText.js
index 6ec3bb64..dd4c61c0 100644
--- a/lib/extract/extractText.js
+++ b/lib/extract/extractText.js
@@ -77,14 +77,7 @@ export function extractFont(props) {
 
 function parseDelta(delta) {
     if (typeof delta === 'string') {
-        const trim = delta.trim();
-        if (trim.slice(-2) === 'em') {
-            return [trim];
-        } else if (isNaN(+delta)) {
-            return trim.replace(commaReg, ' ').split(spaceReg).map(d => +d || 0);
-        } else {
-            return [+delta];
-        }
+        return delta.trim().replace(commaReg, ' ').split(spaceReg);
     } else if (typeof delta === 'number') {
         return [delta];
     } else {