From 3ae33d1fab903737a8aaa1a5de9656ed7271ed7f Mon Sep 17 00:00:00 2001
From: Mehran Dehghanian <mehranmd19@gmail.com>
Date: Fri, 8 Apr 2022 17:24:11 +0430
Subject: [PATCH] Add 'FocusBlur tab detection'

---
 FocusBlur-tab-detection.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 FocusBlur-tab-detection.md

diff --git a/FocusBlur-tab-detection.md b/FocusBlur-tab-detection.md
new file mode 100644
index 0000000..52ca52a
--- /dev/null
+++ b/FocusBlur-tab-detection.md
@@ -0,0 +1,15 @@
+Detect tab change in react, class base:
+
+```
+componentDidMount() {
+    window.addEventListener("focus", this.onFocus)
+}
+
+componentWillUnmount() {
+    window.removeEventListener("focus", this.onFocus)
+}
+
+onFocus = () => {
+    //
+}
+```
\ No newline at end of file