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experiment: add virtual-list base styles #9668

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experiment: add virtual-list base styles #9668

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4a6344a
base styles
jouni Jul 9, 2025
6e3b893
Update virtual-list.html
jouni Jul 9, 2025
13cf085
fix lint error
jouni Jul 9, 2025
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15 changes: 11 additions & 4 deletions dev/virtual-list.html
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Original file line number Diff line number Diff line change
Expand Up @@ -18,13 +18,20 @@
root.innerHTML = `<div>${item.label}</div>`;
};

const list = document.querySelector('vaadin-virtual-list');
list.items = items;
list.renderer = renderer;
document.querySelectorAll('vaadin-virtual-list').forEach((list) => {
list.items = items;
list.renderer = renderer;
});
</script>
</head>

<body>
<vaadin-virtual-list style="height: 400px"></vaadin-virtual-list>
<section>
<vaadin-virtual-list style="height: 200px"></vaadin-virtual-list>
</section>
<section>
<h2 class="heading">Overflow Indicators</h2>
<vaadin-virtual-list style="height: 200px" theme="overflow-indicators"></vaadin-virtual-list>
</section>
</body>
</html>
8 changes: 8 additions & 0 deletions packages/virtual-list/src/styles/vaadin-virtual-list-base-styles.d.ts
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@@ -0,0 +1,8 @@
/**
* @license
* Copyright (c) 2017 - 2025 Vaadin Ltd.
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
import type { CSSResult } from 'lit';

export const virtualListStyles: CSSResult;
51 changes: 51 additions & 0 deletions packages/virtual-list/src/styles/vaadin-virtual-list-base-styles.js
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@@ -0,0 +1,51 @@
/**
* @license
* Copyright (c) 2017 - 2025 Vaadin Ltd.
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
import '@vaadin/component-base/src/style-props.js';
import { css } from 'lit';

export const virtualListStyles = css`
:host {
display: block;
height: 400px;
overflow: auto;
flex: auto;
align-self: stretch;
}

:host([hidden]) {
display: none !important;
}

:host(:not([grid])) #items > ::slotted(*) {
width: 100%;
}

#items {
position: relative;
}

:host([theme~='overflow-indicators'])::before,
:host([theme~='overflow-indicators'])::after {
content: '';
display: none;
position: sticky;
inset: 0;
z-index: 9999;
height: 1px;
margin-bottom: -1px;
background: var(--vaadin-virtual-list-border-color, var(--vaadin-border-color));
}

:host([theme~='overflow-indicators'])::after {
margin-bottom: 0;
margin-top: -1px;
}

:host([theme~='overflow-indicators'][overflow~='top'])::before,
:host([theme~='overflow-indicators'][overflow~='bottom'])::after {
display: block;
}
`;