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experiment: add select base styles and visual tests
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‎dev/select.html

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@@ -1,32 +1,79 @@
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<!DOCTYPE html>
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Select</title>
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<script type="module" src="./common.js"></script>
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<script type="module">
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import '@vaadin/icon';
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import '@vaadin/icons';
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import '@vaadin/select';
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import '@vaadin/tooltip';
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import '@vaadin/vaadin-lumo-styles/vaadin-iconset.js';
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</script>
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</head>
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<body>
15-
<vaadin-select label="Size">
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<vaadin-tooltip slot="tooltip" text="Stock availability may vary"></vaadin-tooltip>
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</vaadin-select>
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<section>
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<h2>Plain</h2>
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<vaadin-select value="s"></vaadin-select>
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<vaadin-select placeholder="Placeholder"></vaadin-select>
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</section>
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<section>
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<h2>Bells & Whistles</h2>
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<vaadin-select
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label="Label"
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helper-text="Description for this field."
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value="s"
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clear-button-visible
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error-message="You need to write something in this field."
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required
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>
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<vaadin-icon icon="vaadin:search" slot="prefix"></vaadin-icon>
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</vaadin-select>
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</section>
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<section>
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<h2>States</h2>
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<vaadin-select
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label="Read-only"
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helper-text="Description for this field."
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value="s"
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clear-button-visible
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error-message="You need to write something in this field."
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required
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readonly
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>
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<vaadin-icon icon="vaadin:search" slot="prefix"></vaadin-icon>
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</vaadin-select>
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<vaadin-select
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label="Disabled"
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helper-text="Description for this field."
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value="s"
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clear-button-visible
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error-message="You need to write something in this field."
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required
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disabled
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>
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<vaadin-icon icon="vaadin:search" slot="prefix"></vaadin-icon>
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</vaadin-select>
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</section>
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<script>
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const select = document.querySelector('vaadin-select');
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select.items = items = [
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{ label: 'Show all', value: 'all' },
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{ component: 'hr' },
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{ label: 'XS (out of stock)', value: 'xs', disabled: true },
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{ label: 'S', value: 's' },
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{ label: 'M', value: 'm' },
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{ label: 'L', value: 'l' },
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{ label: 'XL', value: 'xl' },
29-
];
66+
document.querySelectorAll('vaadin-select').forEach((select) => {
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select.items = items = [
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{ label: 'Show all', value: 'all' },
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{ component: 'hr' },
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{ label: 'XS (out of stock)', value: 'xs', disabled: true },
71+
{ label: 'S', value: 's' },
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{ label: 'M', value: 'm' },
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{ label: 'L', value: 'l' },
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{ label: 'XL', value: 'xl' },
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];
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});
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</script>
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</body>
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</html>

‎packages/overlay/package.json

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@@ -21,6 +21,8 @@
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"type": "module",
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"files": [
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"src",
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"!src/*-base-styles.d.ts",
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"!src/*-base-styles.js",
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"theme",
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"vaadin-*.d.ts",
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"vaadin-*.js"

‎packages/overlay/src/vaadin-overlay-base-styles.js

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/**
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* @license
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* Copyright (c) 2017 - 2025 Vaadin Ltd.
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* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
5+
*/
6+
import '@vaadin/component-base/src/style-props.js';
7+
import { css } from 'lit';
8+
9+
export const overlayStyles = css`
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:host {
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z-index: 200;
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position: fixed;
13+
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/* Despite of what the names say, <vaadin-overlay> is just a container
15+
for position/sizing/alignment. The actual overlay is the overlay part. */
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/* Default position constraints. Themes can
18+
override this to adjust the gap between the overlay and the viewport. */
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inset: 8px;
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bottom: var(--vaadin-overlay-viewport-bottom);
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/* Use flexbox alignment for the overlay part. */
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display: flex;
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flex-direction: column; /* makes dropdowns sizing easier */
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/* Align to center by default. */
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align-items: center;
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justify-content: center;
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/* Allow centering when max-width/max-height applies. */
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margin: auto;
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/* The host is not clickable, only the overlay part is. */
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pointer-events: none;
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/* Remove tap highlight on touch devices. */
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-webkit-tap-highlight-color: transparent;
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/* CSS API for host */
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--vaadin-overlay-viewport-bottom: 8px;
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}
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:host([hidden]),
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:host(:not([opened]):not([closing])),
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:host(:not([opened]):not([closing])) [part='overlay'] {
45+
display: none !important;
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}
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[part='overlay'] {
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background: var(--vaadin-overlay-background, var(--_vaadin-background));
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border: var(--vaadin-overlay-border, 1px solid var(--_vaadin-border-color));
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border-radius: var(--vaadin-overlay-border-radius, var(--_vaadin-radius-m));
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box-shadow: var(--vaadin-overlay-box-shadow, 0 8px 24px -4px hsl(0 0 0 / 0.3));
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box-sizing: border-box;
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max-width: 100%;
55+
overflow: auto;
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overscroll-behavior: contain;
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pointer-events: auto;
58+
-webkit-tap-highlight-color: initial;
59+
}
60+
61+
[part='backdrop'] {
62+
background: var(--vaadin-overlay-backdrop-background, rgba(0, 0, 0, 0.5));
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content: '';
64+
inset: 0;
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pointer-events: auto;
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position: fixed;
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z-index: -1;
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}
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70+
@media (forced-colors: active) {
71+
[part='overlay'] {
72+
border: 3px solid;
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}
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[part='overlay']:focus-visible {
76+
outline: var(--vaadin-focus-ring-width) solid;
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outline-offset: 1px;
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}
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}
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`;

‎packages/overlay/src/vaadin-overlay-core-styles.js

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/**
2+
* @license
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* Copyright (c) 2017 - 2025 Vaadin Ltd.
4+
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
5+
*/
6+
import { css } from 'lit';
7+
8+
export const overlayStyles = css`
9+
:host {
10+
z-index: 200;
11+
position: fixed;
12+
13+
/* Despite of what the names say, <vaadin-overlay> is just a container
14+
for position/sizing/alignment. The actual overlay is the overlay part. */
15+
16+
/* Default position constraints: the entire viewport. Note: themes can
17+
override this to introduce gaps between the overlay and the viewport. */
18+
inset: 0;
19+
bottom: var(--vaadin-overlay-viewport-bottom);
20+
21+
/* Use flexbox alignment for the overlay part. */
22+
display: flex;
23+
flex-direction: column; /* makes dropdowns sizing easier */
24+
/* Align to center by default. */
25+
align-items: center;
26+
justify-content: center;
27+
28+
/* Allow centering when max-width/max-height applies. */
29+
margin: auto;
30+
31+
/* The host is not clickable, only the overlay part is. */
32+
pointer-events: none;
33+
34+
/* Remove tap highlight on touch devices. */
35+
-webkit-tap-highlight-color: transparent;
36+
37+
/* CSS API for host */
38+
--vaadin-overlay-viewport-bottom: 0;
39+
}
40+
41+
:host([hidden]),
42+
:host(:not([opened]):not([closing])),
43+
:host(:not([opened]):not([closing])) [part='overlay'] {
44+
display: none !important;
45+
}
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47+
[part='overlay'] {
48+
-webkit-overflow-scrolling: touch;
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overflow: auto;
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pointer-events: auto;
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/* Prevent overflowing the host */
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max-width: 100%;
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box-sizing: border-box;
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-webkit-tap-highlight-color: initial; /* reenable tap highlight inside */
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}
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59+
[part='backdrop'] {
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z-index: -1;
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content: '';
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background: rgba(0, 0, 0, 0.5);
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position: fixed;
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inset: 0;
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pointer-events: auto;
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}
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`;

‎packages/overlay/src/vaadin-overlay-styles.js

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@@ -3,65 +3,4 @@
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* Copyright (c) 2017 - 2025 Vaadin Ltd.
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* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
55
*/
6-
import { css } from 'lit';
7-
8-
export const overlayStyles = css`
9-
:host {
10-
z-index: 200;
11-
position: fixed;
12-
13-
/* Despite of what the names say, <vaadin-overlay> is just a container
14-
for position/sizing/alignment. The actual overlay is the overlay part. */
15-
16-
/* Default position constraints: the entire viewport. Note: themes can
17-
override this to introduce gaps between the overlay and the viewport. */
18-
inset: 0;
19-
bottom: var(--vaadin-overlay-viewport-bottom);
20-
21-
/* Use flexbox alignment for the overlay part. */
22-
display: flex;
23-
flex-direction: column; /* makes dropdowns sizing easier */
24-
/* Align to center by default. */
25-
align-items: center;
26-
justify-content: center;
27-
28-
/* Allow centering when max-width/max-height applies. */
29-
margin: auto;
30-
31-
/* The host is not clickable, only the overlay part is. */
32-
pointer-events: none;
33-
34-
/* Remove tap highlight on touch devices. */
35-
-webkit-tap-highlight-color: transparent;
36-
37-
/* CSS API for host */
38-
--vaadin-overlay-viewport-bottom: 0;
39-
}
40-
41-
:host([hidden]),
42-
:host(:not([opened]):not([closing])),
43-
:host(:not([opened]):not([closing])) [part='overlay'] {
44-
display: none !important;
45-
}
46-
47-
[part='overlay'] {
48-
-webkit-overflow-scrolling: touch;
49-
overflow: auto;
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pointer-events: auto;
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52-
/* Prevent overflowing the host */
53-
max-width: 100%;
54-
box-sizing: border-box;
55-
56-
-webkit-tap-highlight-color: initial; /* reenable tap highlight inside */
57-
}
58-
59-
[part='backdrop'] {
60-
z-index: -1;
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content: '';
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background: rgba(0, 0, 0, 0.5);
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position: fixed;
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inset: 0;
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pointer-events: auto;
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}
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`;
6+
export { overlayStyles } from './vaadin-overlay-core-styles.js';

‎packages/select/package.json

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"lit.d.ts",
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"lit.js",
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"src",
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"!src/*-base-styles.d.ts",
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"!src/*-base-styles.js",
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"theme",
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"vaadin-*.d.ts",
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"vaadin-*.js",

‎packages/select/src/vaadin-lit-select-item.js

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* Copyright (c) 2017 - 2025 Vaadin Ltd.
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* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
55
*/
6-
import { css, html, LitElement } from 'lit';
6+
import { html, LitElement } from 'lit';
77
import { defineCustomElement } from '@vaadin/component-base/src/define.js';
88
import { DirMixin } from '@vaadin/component-base/src/dir-mixin.js';
99
import { PolylitMixin } from '@vaadin/component-base/src/polylit-mixin.js';
10+
import { itemStyles } from '@vaadin/item/src/vaadin-item-core-styles.js';
1011
import { ItemMixin } from '@vaadin/item/src/vaadin-item-mixin.js';
1112
import { ThemableMixin } from '@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js';
1213

@@ -25,15 +26,7 @@ class SelectItem extends ItemMixin(ThemableMixin(DirMixin(PolylitMixin(LitElemen
2526
}
2627

2728
static get styles() {
28-
return css`
29-
:host {
30-
display: inline-block;
31-
}
32-
33-
:host([hidden]) {
34-
display: none !important;
35-
}
36-
`;
29+
return itemStyles;
3730
}
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3932
static get properties() {

‎packages/select/src/vaadin-lit-select-list-box.js

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* Copyright (c) 2017 - 2025 Vaadin Ltd.
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* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
55
*/
6-
import { css, html, LitElement } from 'lit';
6+
import { html, LitElement } from 'lit';
77
import { ListMixin } from '@vaadin/a11y-base/src/list-mixin.js';
88
import { defineCustomElement } from '@vaadin/component-base/src/define.js';
99
import { DirMixin } from '@vaadin/component-base/src/dir-mixin.js';
1010
import { PolylitMixin } from '@vaadin/component-base/src/polylit-mixin.js';
11+
import { listBoxStyles } from '@vaadin/list-box/src/vaadin-list-box-core-styles.js';
1112
import { ThemableMixin } from '@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js';
1213

1314
/**
@@ -25,22 +26,7 @@ class SelectListBox extends ListMixin(ThemableMixin(DirMixin(PolylitMixin(LitEle
2526
}
2627

2728
static get styles() {
28-
return css`
29-
:host {
30-
display: flex;
31-
}
32-
33-
:host([hidden]) {
34-
display: none !important;
35-
}
36-
37-
[part='items'] {
38-
height: 100%;
39-
width: 100%;
40-
overflow-y: auto;
41-
-webkit-overflow-scrolling: touch;
42-
}
43-
`;
29+
return listBoxStyles;
4430
}
4531

4632
static get properties() {

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