Using full equal sign to check undefined or null

chinajuns · Apr 17, 2018 · 741490f · 741490f
1 parent aa30ca1
commit 741490f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/lib/tool.js b/src/lib/tool.js
@@ -58,10 +58,10 @@ export function isBoolean(value) {
   return Object.prototype.toString.call(value) == '[object Boolean]';
 }
 export function isUndefined(value) {
-  return Object.prototype.toString.call(value) == '[object Undefined]';
+  return value === undefined;
 }
 export function isNull(value) {
-  return Object.prototype.toString.call(value) == '[object Null]';
+  return value === null;
 }
 export function isSymbol(value) {
   return Object.prototype.toString.call(value) == '[object Symbol]';