diff --git a/src/utils/strUtil.js b/src/utils/strUtil.js
index 0389b58..85395bb 100644
--- a/src/utils/strUtil.js
+++ b/src/utils/strUtil.js
@@ -3,6 +3,7 @@ export function isBlank(value) {
     if (value === "" || value === null || value === undefined) {
         return true;
     }
+    value = value + "";
     value = value.trim();
     if ("" === value || value === "string" || value === "undefined") {
         return true;