Improve _posFixed to make sure content never gets cut off on very small view ports.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tp/helpers",
-  "version": "2.6.0",
+  "version": "2.7.0",
   "description": "",
   "main": "closest.js",
   "scripts": {

position.js

@@ -52,6 +52,12 @@ export const Position = function(superClass) {
         }
       }
 
+      // Ensure top never goes below 0
+      if (top < 0) {
+        compTop += Math.abs(top);
+        top = 0;
+      }
+
       if (options.halign === 'left') {
         left = anchorRect.left;
       }
@@ -74,6 +80,17 @@ export const Position = function(superClass) {
         left = 0;
       }
 
+      // Constrain height to viewport - calculate available height from final top position
+      const availableHeight = window.innerHeight - top;
+      if (elRect.height > availableHeight) {
+        el.style.maxHeight = availableHeight + 'px';
+        el.style.overflowY = 'auto';
+      } else {
+        // Reset max-height if element fits
+        el.style.maxHeight = '';
+        el.style.overflowY = '';
+      }
+
       el.style.top = (top - fixTop) + 'px';
       el.style.left = (left - fixLeft) + 'px';