Add scroll-behavior utilities (#5388)

Author: lukewarlow

src/corePlugins.js

@@ -1110,6 +1110,13 @@ export let overscrollBehavior = ({ addUtilities }) => {
   })
 }
 
+export let scrollBehavior = ({ addUtilities }) => {
+  addUtilities({
+    '.scroll-auto': { 'scroll-behavior': 'auto' },
+    '.scroll-smooth': { 'scroll-behavior': 'smooth' },
+  })
+}
+
 export let textOverflow = ({ addUtilities }) => {
   addUtilities({
     '.truncate': { overflow: 'hidden', 'text-overflow': 'ellipsis', 'white-space': 'nowrap' },

tests/raw-content.test.css

@@ -364,6 +364,9 @@
 .overscroll-contain {
   overscroll-behavior: contain;
 }
+.scroll-smooth {
+  scroll-behavior: smooth;
+}
 .truncate {
   overflow: hidden;
   text-overflow: ellipsis;

tests/raw-content.test.html

@@ -96,6 +96,7 @@
     <div class="outline-none outline-black"></div>
     <div class="overflow-hidden"></div>
     <div class="overscroll-contain"></div>
+    <div class="scroll-smooth"></div>
     <div class="p-4 py-2 px-3 pt-1 pr-2 pb-3 pl-4"></div>
     <div class="place-content-start"></div>
     <div class="placeholder-green-300"></div>