refactoring

Resolve #7779

packages/client/src/directives/sticky-container.ts

@@ -0,0 +1,15 @@
+import { Directive } from 'vue';
+
+export default {
+	mounted(src, binding, vn) {
+		//const query = binding.value;
+
+		const header = src.children[0];
+		const currentStickyTop = getComputedStyle(src).getPropertyValue('--stickyTop') || '0px';
+		src.style.setProperty('--stickyTop', `calc(${currentStickyTop} + ${header.offsetHeight}px)`);
+		header.style.setProperty('--stickyTop', currentStickyTop);
+		header.style.position = 'sticky';
+		header.style.top = 'var(--stickyTop)';
+		header.style.zIndex = '1';
+	},
+} as Directive;