From e76941f2f139895e44129c597a5d80d2ff845c3c Mon Sep 17 00:00:00 2001
From: Chalarangelo <chalarangelo@gmail.com>
Date: Mon, 8 Nov 2021 15:52:33 +0200
Subject: [PATCH] Add onWindow hooks

---
 snippets/useOnWindowResize.md | 37 +++++++++++++++++++++++++++++++++++
 snippets/useOnWindowScroll.md | 35 +++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 snippets/useOnWindowResize.md
 create mode 100644 snippets/useOnWindowScroll.md

diff --git a/snippets/useOnWindowResize.md b/snippets/useOnWindowResize.md
new file mode 100644
index 000000000..c929f7011
--- /dev/null
+++ b/snippets/useOnWindowResize.md
@@ -0,0 +1,37 @@
+---
+title: useOnWindowResize
+tags: hooks,effect,intermediate
+firstSeen: 2021-12-01T05:00:00-04:00
+---
+
+Executes a callback whenever the window is resized.
+
+- Use the `useRef()` hook to create a variable, `listener`, which will hold the listener reference.
+- Use the `useEffect()` hook and `EventTarget.addEventListener()` to listen to the `'resize'` event of the `window` global object.
+- Use `EventTarget.removeEventListener()` to remove any existing listeners and clean up when the component unmounts.
+
+```jsx
+const useOnWindowResize = callback => {
+  const listener = React.useRef(null);
+
+  React.useEffect(() => {
+    if (listener.current)
+      window.removeEventListener('resize', listener.current);
+    listener.current = window.addEventListener('resize', callback);
+    return () => {
+      window.removeEventListener('resize', listener.current);
+    };
+  }, [callback]);
+};
+```
+
+```jsx
+const App = () => {
+  useOnWindowResize(() =>
+    console.log(`window size: (${window.innerWidth}, ${window.innerHeight})`)
+  );
+  return <p>Resize the window and check the console</p>;
+};
+
+ReactDOM.render(<App />, document.getElementById('root'));
+```
diff --git a/snippets/useOnWindowScroll.md b/snippets/useOnWindowScroll.md
new file mode 100644
index 000000000..f31fb7756
--- /dev/null
+++ b/snippets/useOnWindowScroll.md
@@ -0,0 +1,35 @@
+---
+title: useOnWindowScroll
+tags: hooks,effect,intermediate
+firstSeen: 2021-12-08T05:00:00-04:00
+---
+
+Executes a callback whenever the window is scrolled.
+
+- Use the `useRef()` hook to create a variable, `listener`, which will hold the listener reference.
+- Use the `useEffect()` hook and `EventTarget.addEventListener()` to listen to the `'scroll'` event of the `window` global object.
+- Use `EventTarget.removeEventListener()` to remove any existing listeners and clean up when the component unmounts.
+
+```jsx
+const useOnWindowScroll = callback => {
+  const listener = React.useRef(null);
+
+  React.useEffect(() => {
+    if (listener.current)
+      window.removeEventListener('scroll', listener.current);
+    listener.current = window.addEventListener('scroll', callback);
+    return () => {
+      window.removeEventListener('scroll', listener.current);
+    };
+  }, [callback]);
+};
+```
+
+```jsx
+const App = () => {
+  useOnWindowScroll(() => console.log(`scroll Y: ${window.pageYOffset}`));
+  return <p style={{ height: '300vh' }}>Scroll and check the console</p>;
+};
+
+ReactDOM.render(<App />, document.getElementById('root'));
+```