Dialog

Dialogs are elements that are overlaid on a web page or app in order to present necessary information and tasks. Dialogs are also sometimes referred to as modals or overlays.

Guidelines

Using dialogs

Dialogs facilitate communication between the system and user. They perform best when used for urgent decisions or as a workflow within a bigger task, as they don’t require loading a new page and keep actions in context.

Dialogs can be intentionally disruptive, since the user needs to interact with or close the dialog before moving on. For this reason, they should be used sparingly and only when necessary (more information below).

Example of a Codex Dialog with a title, paragraph, two action buttons, and a close button.

When to use:

When the user needs to make a decision or provide input to the system before continuing with the task at hand.
When additional information needs to be displayed and separated from the page content.
When the user needs to provide additional confirmation before taking an action.

When not to use:

When the information can be displayed inline within the main interface.
When the information is not important enough to interrupt the user's flow.
When the content within the dialog is so long that it requires scrolling. In this case, split the dialog content into different steps or provide it on a dedicated page.
When dealing with a lengthy form comprising numerous form fields and actions. In this case it's more appropriate to create the form on a separate page.

Specifications

Specification of Dialog.

A dialog contains:

Title
All dialogs should include a title. This should be a short, one-line overview of the purpose of the dialog.
Subtitle (optional)
A subtitle can be used to provide additional information about the dialog.
Body
Any type of content or components can be included within the dialog’s body.
Footer text (optional)
Further text can be included above the action buttons, in order to provide additional information (e.g. terms and conditions to read before publishing).
Permanent action (optional)
A permanent action can be included (e.g. “Don’t show again”). Main action: A primary button (either progressive or destructive) is used to indicate the main action.
Secondary action (optional)
A normal neutral button can be used to indicate a secondary action (e.g. “Cancel”).
Close button (optional)
A quiet, icon-only button may be used to close the dialog. It can also be replaced with a text button in some cases.

Behind every dialog, there is an overlay that displays the color White (#fff) at 65% opacity. This is to provide continued context while the user focuses on the dialog.

A white overlay separating a dialog from a Wikipedia page.

If the action buttons’ text is too long, the main action button may be stacked above the secondary action.

A dialog with stacked buttons due to their lengthy text.

Scrolling

If needed, scrolling is allowed in dialogs, but should be used sparingly. While scrolling, top and bottom dividers appear and both the top and bottom sections become fixed as content scrolls underneath them.

A dialog is being scrolled with fixed head and footer sections.

Closing

A dialog can be dismissed by:

The close button (X)
A dismissive action like “Cancel“
Tapping or clicking anywhere outside of the dialog on the background
Pressing the key ‘esc’

A representation of how dialogs can be closed.

Maximum width and height

All dialogs are vertically and horizontally centered on the canvas. We aim to keep dialogs at a fixed width of 512dp on desktop, while allowing them to use 90% of the width on mobile web. This makes dialogs the focus of the screen.

A desktop and mobile mockup of a Wikipedia page with a dialog displayed on the center of the page.

Refer to the Dialog component in Codex Figma.

Interaction states

Buttons may be disabled until a required action is completed.

Demos

Configurable Dialog

Name	Value
Props
title
subtitle
hideTitle
closeButtonLabel
stackedActions
usePrimaryAction
primaryActionLabel
primaryActionType	progressive destructive
primaryActionDisabled
useDefaultAction
defaultActionLabel
defaultActionDisabled
Slots
default
footer-text
View
Reading direction	Left to right (LTR) Right to left (RTL)

Basic example

This example includes a title, close button label (which enables the appearance of the icon-only close button), primary action, and default action.

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Save changes"
			close-button-label="Close"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		>
			<p>Do you want to save your changes?</p>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';

import {
	CdxButton,
	CdxDialog
} from '@wikimedia/codex';

export default defineComponent( {
	name: 'DialogBasic',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Save',
			actionType: 'progressive'
		};

		const defaultAction = {
			label: 'Cancel'
		};

		function onPrimaryAction() {
			open.value = false;
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
		}

		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Save changes"
			close-button-label="Close"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		>
			<p>Do you want to save your changes?</p>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );

const {
	CdxButton,
	CdxDialog
} = require( '@wikimedia/codex' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogBasic',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Save',
			actionType: 'progressive'
		};

		const defaultAction = {
			label: 'Cancel'
		};

		function onPrimaryAction() {
			open.value = false;
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
		}

		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

With expandable menus

Expandable menus, like the one used by the Select component, will extend past the end of the dialog frame (instead of being cut off by it).

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Dialog with expandable menus"
			close-button-label="Close"
			:default-action="defaultAction"
			@default="open = false"
		>
			<cdx-select
				v-model:selected="selected"
				:menu-items="menuItems"
				default-label="Select an option with a really really really long title"
			/>

			<br>
			<br>

			<cdx-combobox
				v-model:selected="inputValue"
				:menu-items="menuItems"
				default-label="Select an option with a really really really long title"
			/>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxButton, CdxDialog, CdxSelect, CdxCombobox } from '@wikimedia/codex';

export default defineComponent( {
	name: 'DialogWithSelect',
	components: {
		CdxButton,
		CdxDialog,
		CdxSelect,
		CdxCombobox
	},
	setup() {
		const open = ref( false );

		const defaultAction = {
			label: 'Close'
		};
		const menuItems = [
			{ label: 'Option A', value: 'a' },
			{ label: 'Option B', value: 'b' },
			{ label: 'Option C', value: 'c' },
			{ label: 'Option D', value: 'd' }
		];
		const selected = ref( null );
		const inputValue = ref( 'a' );
		return {
			open,
			defaultAction,
			menuItems,
			selected,
			inputValue
		};
	}
} );
</script>

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Dialog with expandable menus"
			close-button-label="Close"
			:default-action="defaultAction"
			@default="open = false"
		>
			<cdx-select
				v-model:selected="selected"
				:menu-items="menuItems"
				default-label="Select an option with a really really really long title"
			></cdx-select>

			<br>
			<br>

			<cdx-combobox
				v-model:selected="inputValue"
				:menu-items="menuItems"
				default-label="Select an option with a really really really long title"
			></cdx-combobox>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxButton, CdxDialog, CdxSelect, CdxCombobox } = require( '@wikimedia/codex' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogWithSelect',
	components: {
		CdxButton,
		CdxDialog,
		CdxSelect,
		CdxCombobox
	},
	setup() {
		const open = ref( false );

		const defaultAction = {
			label: 'Close'
		};
		const menuItems = [
			{ label: 'Option A', value: 'a' },
			{ label: 'Option B', value: 'b' },
			{ label: 'Option C', value: 'c' },
			{ label: 'Option D', value: 'd' }
		];
		const selected = ref( null );
		const inputValue = ref( 'a' );
		return {
			open,
			defaultAction,
			menuItems,
			selected,
			inputValue
		};
	}
} );
</script>

With overflowing content

When content in the default slot (the dialog body) is longer than the available space, the body section will scroll while the dialog header and footer will remain in view.

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Dialog with long content"
			close-button-label="Close"
			:show-dividers="true"
			:default-action="defaultAction"
			@default="open = false"
		>
			<p>
				Zesty tofu pad thai dessert cool cucumbers kung pao pepper
				grapefruit creamy cauliflower alfredo figs ghost pepper seitan
				asian pear. Ginger carrot spiced juice sweet potato Indian
				spiced peppermint onion hearty tofu raspberry fizz mediterranean
				black beans banana dark and stormy red amazon pepper tomato and
				basil balsamic vinaigrette.
			</p>
			<p>
				Cool spring earl grey latte lemon lime minty crumbled lentils
				bite sized kale caesar salad green onions açai blueberry chia
				seed jam. Lemongrass chili pepper fiery fruit Thai dragon pepper
				overflowing cashew vegan mediterranean luxury bowl cilantro lime
				vinaigrette smoky maple tempeh glaze green tea lime cauliflower
				springtime strawberry bean wraps coconut chocolate peanut butter
				dip ginger lemongrass agave green tea grain avocado basil pesto.
			</p>
			<p>
				Casserole pine nuts salad lemonade zest samosa habanero golden
				apple vinaigrette red curry banana bread avocado strawberries
				spiced peppermint blast homemade balsamic mint taco salsa soy
				milk lemon chili lentils lime mango crisp muffins mediterranean
				instant pot peach strawberry mango. Mushroom risotto chai tea
				summer tahini drizzle pistachio pesto cranberry spritzer
				artichoke hearts blood orange smash cookies shiitake mushrooms
				couscous soba noodles.
			</p>
			<p>
				Fall strawberry mango smoothie a delicious meal green grapes
				crispy iceberg lettuce dragon fruit street style Thai basil
				tacos banana bread golden cayenne pepper cayenne ultimate
				Italian pepperoncini thyme miso turmeric glazed aubergine
				jalapeño pumpkin.  Creamiest leek banh mi salad rolls tempeh
				oranges toasted hazelnuts apricot hazelnut shiitake lemon tahini
				dressing roasted brussel sprouts cilantro kale cozy cinnamon
				kimchi cumin winter cherry arugula salad Caribbean red habanero
				broccoli peanut butter crunch.
			</p>
			<p>
				Hemp seeds apple vinaigrette dark and stormy habanero golden
				coriander peppermint asian pear frosted gingerbread bites
				Southern Italian almond milk chai latte mint golden cayenne
				pepper. Salted dark chocolate bruschetta figs green tea lime
				mediterranean second course dessert sesame soba noodles
				overflowing strawberry spinach salad.
			</p>
			<p>
				Hearty refreshing cucumber splash cherry chickpea crust pizza
				banana black bean wraps red amazon pepper banana bread arugula
				salad edamame avocado dressing drizzle veggie burgers heat green
				pepper soy milk lingonberry shaved almonds raspberry fizz
				lemongrass matcha salty. Portobello mushrooms coconut sugar
				sriracha pecans spring cool cucumbers lemon lime minty chia
				seeds lemon blueberry chia seed jam Italian pepperoncini
				Malaysian sweet potato sleepy morning tea balsamic vinaigrette
				street style Thai basil tacos seeds chai tea crispy ultimate
				cool off cozy butternut smoked tofu blueberries pasta bananas.
			</p>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxButton, CdxDialog } from '@wikimedia/codex';

export default defineComponent( {
	name: 'DialogMaxContent',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const defaultAction = {
			label: 'Close'
		};
		return {
			open,
			defaultAction
		};
	}
} );
</script>

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Dialog with long content"
			close-button-label="Close"
			:show-dividers="true"
			:default-action="defaultAction"
			@default="open = false"
		>
			<p>
				Zesty tofu pad thai dessert cool cucumbers kung pao pepper
				grapefruit creamy cauliflower alfredo figs ghost pepper seitan
				asian pear. Ginger carrot spiced juice sweet potato Indian
				spiced peppermint onion hearty tofu raspberry fizz mediterranean
				black beans banana dark and stormy red amazon pepper tomato and
				basil balsamic vinaigrette.
			</p>
			<p>
				Cool spring earl grey latte lemon lime minty crumbled lentils
				bite sized kale caesar salad green onions açai blueberry chia
				seed jam. Lemongrass chili pepper fiery fruit Thai dragon pepper
				overflowing cashew vegan mediterranean luxury bowl cilantro lime
				vinaigrette smoky maple tempeh glaze green tea lime cauliflower
				springtime strawberry bean wraps coconut chocolate peanut butter
				dip ginger lemongrass agave green tea grain avocado basil pesto.
			</p>
			<p>
				Casserole pine nuts salad lemonade zest samosa habanero golden
				apple vinaigrette red curry banana bread avocado strawberries
				spiced peppermint blast homemade balsamic mint taco salsa soy
				milk lemon chili lentils lime mango crisp muffins mediterranean
				instant pot peach strawberry mango. Mushroom risotto chai tea
				summer tahini drizzle pistachio pesto cranberry spritzer
				artichoke hearts blood orange smash cookies shiitake mushrooms
				couscous soba noodles.
			</p>
			<p>
				Fall strawberry mango smoothie a delicious meal green grapes
				crispy iceberg lettuce dragon fruit street style Thai basil
				tacos banana bread golden cayenne pepper cayenne ultimate
				Italian pepperoncini thyme miso turmeric glazed aubergine
				jalapeño pumpkin.  Creamiest leek banh mi salad rolls tempeh
				oranges toasted hazelnuts apricot hazelnut shiitake lemon tahini
				dressing roasted brussel sprouts cilantro kale cozy cinnamon
				kimchi cumin winter cherry arugula salad Caribbean red habanero
				broccoli peanut butter crunch.
			</p>
			<p>
				Hemp seeds apple vinaigrette dark and stormy habanero golden
				coriander peppermint asian pear frosted gingerbread bites
				Southern Italian almond milk chai latte mint golden cayenne
				pepper. Salted dark chocolate bruschetta figs green tea lime
				mediterranean second course dessert sesame soba noodles
				overflowing strawberry spinach salad.
			</p>
			<p>
				Hearty refreshing cucumber splash cherry chickpea crust pizza
				banana black bean wraps red amazon pepper banana bread arugula
				salad edamame avocado dressing drizzle veggie burgers heat green
				pepper soy milk lingonberry shaved almonds raspberry fizz
				lemongrass matcha salty. Portobello mushrooms coconut sugar
				sriracha pecans spring cool cucumbers lemon lime minty chia
				seeds lemon blueberry chia seed jam Italian pepperoncini
				Malaysian sweet potato sleepy morning tea balsamic vinaigrette
				street style Thai basil tacos seeds chai tea crispy ultimate
				cool off cozy butternut smoked tofu blueberries pasta bananas.
			</p>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxButton, CdxDialog } = require( '@wikimedia/codex' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogMaxContent',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const defaultAction = {
			label: 'Close'
		};
		return {
			open,
			defaultAction
		};
	}
} );
</script>

With stacked actions

When action button text is long, use the stackedActions prop to stack the action buttons vertically.

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Delete all changes?"
			close-button-label="Close"
			:stacked-actions="true"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		/>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxButton, CdxDialog } from '@wikimedia/codex';

export default defineComponent( {
	name: 'DialogStackedActions',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Delete all changes and start over',
			actionType: 'destructive'
		};
		const defaultAction = {
			label: 'Cancel'
		};
		function onPrimaryAction() {
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
			open.value = false;
		}
		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

vue

<template>
	<cdx-button @click="open = true">
		Open dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Delete all changes?"
			close-button-label="Close"
			:stacked-actions="true"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		></cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxButton, CdxDialog } = require( '@wikimedia/codex' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogStackedActions',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Delete all changes and start over',
			actionType: 'destructive'
		};
		const defaultAction = {
			label: 'Cancel'
		};
		function onPrimaryAction() {
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
			open.value = false;
		}
		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

With optional Footer Text

The footer-text slot can accept plain text, links, and basic formatting markup; do not use it to provide images or block-level elements. All content provided is wrapped inside of a <p> tag. Use this slot for situations like showing a disclaimer, linking to help or legal documentation, etc. The footer-text content will appear above the dialog actions.

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Save changes"
			close-button-label="Close"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		>
			<p>Do you want to save your changes?</p>

			<template #footer-text>
				Optional dialog footer text can <a href="#">contain links</a>
				and <strong>basic formatting</strong>,
				<em>but other content should not be used here.</em>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxButton, CdxDialog } from '@wikimedia/codex';

export default defineComponent( {
	name: 'DialogFooterText',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Save',
			actionType: 'progressive'
		};

		const defaultAction = {
			label: 'Cancel'
		};

		function onPrimaryAction() {
			open.value = false;
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
		}

		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="Save changes"
			close-button-label="Close"
			:primary-action="primaryAction"
			:default-action="defaultAction"
			@primary="onPrimaryAction"
			@default="open = false"
		>
			<p>Do you want to save your changes?</p>

			<template #footer-text>
				Optional dialog footer text can <a href="#">contain links</a>
				and <strong>basic formatting</strong>,
				<em>but other content should not be used here.</em>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxButton, CdxDialog } = require( '@wikimedia/codex' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogFooterText',
	components: {
		CdxButton,
		CdxDialog
	},
	setup() {
		const open = ref( false );

		const primaryAction = {
			label: 'Save',
			actionType: 'progressive'
		};

		const defaultAction = {
			label: 'Cancel'
		};

		function onPrimaryAction() {
			open.value = false;
			// eslint-disable-next-line no-console
			console.log( 'Primary action taken' );
		}

		return {
			open,
			primaryAction,
			defaultAction,
			onPrimaryAction
		};
	}
} );
</script>

With custom Header and Footer

By default, the Dialog displays a header with an optional title, subtitle, and close button, and a footer with optional buttons and footer text.

The entire content of the header and footer can be replaced with user-provided markup (by using the #header and #footer slots, respectively). This allows for the creation of one-off custom dialogs as well as variant Dialog components that wrap the base Dialog with some additional content and styling.

NPMMediaWiki

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="My custom dialog"
			class="my-custom-dialog"
		>
			<template #header>
				<div>
					<h2>My custom dialog</h2>
				</div>
				<div>
					<cdx-button
						weight="quiet"
						@click="open = false"
					>
						Close
					</cdx-button>
				</div>
			</template>

			<p>
				The header and footer slots of this dialog have been
				completely customized with custom buttons, styles, and
				markup.
			</p>

			<template #footer>
				<cdx-checkbox v-model="checkboxValue" :inline="true">
					Footer checkbox
				</cdx-checkbox>

				<cdx-button
					weight="primary"
					action="progressive"
					aria-label="Next"
					@click="open = false"
				>
					<cdx-icon :icon="cdxIconNext" />
				</cdx-button>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxButton, CdxDialog, CdxCheckbox, CdxIcon } from '@wikimedia/codex';
import { cdxIconNext } from '@wikimedia/codex-icons';

export default defineComponent( {
	name: 'DialogCustomHeader',
	components: {
		CdxButton,
		CdxDialog,
		CdxCheckbox,
		CdxIcon
	},
	setup() {
		const open = ref( false );

		const checkboxValue = ref( false );

		return {
			open,
			checkboxValue,
			cdxIconNext
		};
	}
} );
</script>

<style lang="less">
@import ( reference ) '@wikimedia/codex-design-tokens/theme-wikimedia-ui.less';

.my-custom-dialog {
	header {
		background-color: @background-color-progressive-subtle;
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		// Custom bigger height.
		height: @size-800;
		padding: @spacing-100;

		h2 {
			margin: 0;
			padding: 0;
			font-size: @font-size-large;
		}
	}

	footer {
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		border-top: @border-style-base @border-width-base @border-color-subtle;
		padding: @spacing-100;
	}
}
</style>

vue

<template>
	<cdx-button @click="open = true">
		Open Dialog
	</cdx-button>

	<client-only>
		<cdx-dialog
			v-model:open="open"
			title="My custom dialog"
			class="my-custom-dialog"
		>
			<template #header>
				<div>
					<h2>My custom dialog</h2>
				</div>
				<div>
					<cdx-button
						weight="quiet"
						@click="open = false"
					>
						Close
					</cdx-button>
				</div>
			</template>

			<p>
				The header and footer slots of this dialog have been
				completely customized with custom buttons, styles, and
				markup.
			</p>

			<template #footer>
				<cdx-checkbox v-model="checkboxValue" :inline="true">
					Footer checkbox
				</cdx-checkbox>

				<cdx-button
					weight="primary"
					action="progressive"
					aria-label="Next"
					@click="open = false"
				>
					<cdx-icon :icon="cdxIconNext"></cdx-icon>
				</cdx-button>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxButton, CdxDialog, CdxCheckbox, CdxIcon } = require( '@wikimedia/codex' );
const { cdxIconNext } = require( './icons.json' );

// @vue/component
module.exports = defineComponent( {
	name: 'DialogCustomHeader',
	components: {
		CdxButton,
		CdxDialog,
		CdxCheckbox,
		CdxIcon
	},
	setup() {
		const open = ref( false );

		const checkboxValue = ref( false );

		return {
			open,
			checkboxValue,
			cdxIconNext
		};
	}
} );
</script>

<style lang="less">
@import 'mediawiki.skin.variables.less';

.my-custom-dialog {
	header {
		background-color: @background-color-progressive-subtle;
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		// Custom bigger height.
		height: @size-800;
		padding: @spacing-100;

		h2 {
			margin: 0;
			padding: 0;
			font-size: @font-size-large;
		}
	}

	footer {
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		border-top: @border-style-base @border-width-base @border-color-subtle;
		padding: @spacing-100;
	}
}
</style>

Reusable custom Dialog example

The example above demonstrates a unique Dialog instance, suitable for a one-off dialog. For a re-usable custom dialog, consider using a wrapper component.

A wrapper component could pre-apply certain customizations (a consistent custom header or footer, for example) while still accepting <slot> content from the user that gets forwarded to the Dialog's own slots.

An example of how to write such a component can be found below. This example relies on Codex's useModelWrapper composable to pass a v-model binding from the parent context down to the inner Dialog component.

Usage of the custom component would look like this:

vue

<wrapped-dialog
  title="Custom dialog header"
  v-model:open="wrappedDialogState"
>  
	Custom dialog content.  
</wrapped-dialog>

NPMMediaWiki

vue

<!-- WrappedDialog.vue -->
<template>
	<client-only>
		<cdx-dialog
			v-model:open="wrappedModel"
			:title="title"
			class="wrapped-dialog"
		>
			<template #header>
				<div>
					<h2>{{ title }}</h2>
				</div>
				<div>
					<cdx-button
						weight="quiet"
						aria-label="close"
						@click="wrappedModel = false"
					>
						Skip
					</cdx-button>
				</div>
			</template>

			<slot />

			<template #footer>
				<cdx-checkbox v-model="checkboxValue">
					Don't show again
				</cdx-checkbox>

				<!-- This button is wired to emit a custom "next" event instead of
				simply closing the dialog -->
				<cdx-button
					weight="primary"
					action="progressive"
					aria-label="Next"
					@click="$emit( 'next' )"
				>
					<cdx-icon :icon="cdxIconNext" />
				</cdx-button>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
import { defineComponent, ref, toRef } from 'vue';
import { CdxButton, CdxCheckbox, CdxDialog, CdxIcon, useModelWrapper } from '@wikimedia/codex';
import { cdxIconNext } from '@wikimedia/codex-icons';

export default defineComponent( {
	name: 'WrappedDialog',

	components: {
		CdxButton,
		CdxCheckbox,
		CdxDialog,
		CdxIcon
	},

	props: {
		open: {
			type: Boolean,
			default: false
		},

		title: {
			type: String,
			default: 'Title'
		}
	},

	emits: [
		'update:open',
		'next'
	],

	setup( props, { emit } ) {
		const checkboxValue = ref( false );
		const wrappedModel = useModelWrapper( toRef( props, 'open' ), emit, 'update:open' );

		return {
			checkboxValue,
			cdxIconNext,
			wrappedModel
		};
	}
} );
</script>

<style lang="less">
@import ( reference ) '@wikimedia/codex-design-tokens/theme-wikimedia-ui.less';

.wrapped-dialog {
	header {
		background-color: @background-color-progressive-subtle;
		display: flex;
		align-items: flex-start;
		justify-content: space-between;
		// Custom bigger height.
		height: @size-800;
		padding: @spacing-100 @spacing-100 0 @spacing-100;

		h2 {
			margin: 0;
			padding: 0;
			font-size: @font-size-large;
		}
	}

	footer {
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		border-top: @border-style-base @border-width-base @border-color-subtle;
		padding: @spacing-75 @spacing-100 @spacing-50 @spacing-100;
	}
}
</style>

vue

<!-- WrappedDialog.vue -->
<template>
	<client-only>
		<cdx-dialog
			v-model:open="wrappedModel"
			:title="title"
			class="wrapped-dialog"
		>
			<template #header>
				<div>
					<h2>{{ title }}</h2>
				</div>
				<div>
					<cdx-button
						weight="quiet"
						aria-label="close"
						@click="wrappedModel = false"
					>
						Skip
					</cdx-button>
				</div>
			</template>

			<slot></slot>

			<template #footer>
				<cdx-checkbox v-model="checkboxValue">
					Don't show again
				</cdx-checkbox>

				<!-- This button is wired to emit a custom "next" event instead of
				simply closing the dialog -->
				<cdx-button
					weight="primary"
					action="progressive"
					aria-label="Next"
					@click="$emit( 'next' )"
				>
					<cdx-icon :icon="cdxIconNext"></cdx-icon>
				</cdx-button>
			</template>
		</cdx-dialog>
	</client-only>
</template>

<script>
const { defineComponent, ref, toRef } = require( 'vue' );
const { CdxButton, CdxCheckbox, CdxDialog, CdxIcon, useModelWrapper } = require( '@wikimedia/codex' );
const { cdxIconNext } = require( './icons.json' );

// @vue/component
module.exports = defineComponent( {
	name: 'WrappedDialog',

	components: {
		CdxButton,
		CdxCheckbox,
		CdxDialog,
		CdxIcon
	},

	props: {
		open: {
			type: Boolean,
			default: false
		},

		title: {
			type: String,
			default: 'Title'
		}
	},

	emits: [
		'update:open',
		'next'
	],

	setup( props, { emit } ) {
		const checkboxValue = ref( false );
		const wrappedModel = useModelWrapper( toRef( props, 'open' ), emit, 'update:open' );

		return {
			checkboxValue,
			cdxIconNext,
			wrappedModel
		};
	}
} );
</script>

<style lang="less">
@import 'mediawiki.skin.variables.less';

.wrapped-dialog {
	header {
		background-color: @background-color-progressive-subtle;
		display: flex;
		align-items: flex-start;
		justify-content: space-between;
		// Custom bigger height.
		height: @size-800;
		padding: @spacing-100 @spacing-100 0 @spacing-100;

		h2 {
			margin: 0;
			padding: 0;
			font-size: @font-size-large;
		}
	}

	footer {
		display: flex;
		align-items: baseline;
		justify-content: space-between;
		border-top: @border-style-base @border-width-base @border-color-subtle;
		padding: @spacing-75 @spacing-100 @spacing-50 @spacing-100;
	}
}
</style>

Vue usage

The Dialog overtakes the user's entire viewport until it is dismissed, preventing mouse and keyboard interaction with other parts of the page while open. This is a significant interruption in the user experience, so this component should be used with care.

The parent component controls whether the Dialog is open via v-model:open.

A Dialog can offer two kinds of actions (represented by buttons of the appropriate type): primary action (can be progressive or destructive), and default action (typically a safe option like "cancel").

When open, the Dialog adds a class to the document body to prevent scrolling; this is applied whether or not teleport is used.

Attributes passed to inner element

This component forwards any attributes applied by the user to the inner .cdx-dialog element, instead of applying them to the outermost backdrop element.

Dialog and <teleport>

Dialogs rely on Vue's built-in <teleport> feature, and a "target" prop can be supplied which will be passed to the teleport's to prop. This prop is optional and defaults to the <body> element on the page (although if Dialog is being used with SSR, a dedicated target should be provided).

An alternative default target can be set using Vue's provide/inject feature, with provide( 'CdxTeleportTarget', '#my-teleport-target' ). This provided target will be used if the "target" prop is not set.

Finally, Dialog teleportation behavior can be disabled by setting renderInPlace: true.

The examples on this page are all wrapped with Vitepress's built-in <client-only> component, since the Codex documentation site (built with Vitepress) uses SSR. Other SSRed applications will need to do something similar (only rendering Dialog after the mounted hook has been fired, etc.).

Use of the Dialog component in features which don't rely on SSR (which includes all MediaWiki usage for now) can dispense with this.

Props

Prop name	Description	Type	Default
`open`	Whether the dialog is visible. Should be provided via a v-model:open binding in the parent scope.	`boolean`	`false`
`title`^(required)	Title for the dialog header. Used for ARIA purposes even if no visible header element is displayed.	`string`
`subtitle`	Optional subtitle for the dialog.	`string`	`null`
`hideTitle`	Whether the dialog header should hide the title & subtitle	`boolean`	`false`
`closeButtonLabel`	Label for the icon-only close button in the header. Including this prop adds the close button.	`string`	`''`
`primaryAction`	Primary user action. This will display a primary button with the specified action (progressive or destructive).	`PrimaryDialogAction`	`null`
`defaultAction`	Default user action. This will display a normal button.	`DialogAction`	`null`
`stackedActions`	Whether action buttons should be vertically stacked and 100% width.	`boolean`	`false`
`target`	Selector or DOM element identifying the container the dialog should be rendered in. The dialog will be `<teleport>`ed to this element. An ID selector is recommended, e.g. `#foo-bar`, but providing an actual element is also supported. If this prop is not set, and the parent or one of its ancestors provides a teleport target using `provide( 'CdxTeleportTarget', '#foo-bar' )`, the provided target will be used. If there is no provided target, the dialog will be teleported to the end of the `<body>` element.	`string\|HTMLElement\|null`	`null`
`renderInPlace`	Whether to disable the use of teleport and render the Dialog in its original location in the document. If this is true, the `target` prop is ignored.	`boolean`	`false`

Events

Event name	Properties	Description
`primary`		When the primary action button is clicked.
`default`		When the default action button is clicked.
`update:open`	newValue `boolean` - The new open/close state (true for open, false for closed)	When the open/close state changes, e.g. when the close button is clicked.

Slots

Name	Description	Bindings
header	Customizable Dialog header
default	Dialog content
footer	Customizable Dialog footer
footer-text	Optional footer text

Dialog ​

Guidelines ​

Using dialogs ​

Specifications ​

Scrolling ​

Closing ​

Maximum width and height ​

Interaction states ​

Demos ​

Configurable Dialog ​

Basic example ​

With expandable menus ​

With overflowing content ​

With stacked actions ​

With optional Footer Text ​

With custom Header and Footer ​

Reusable custom Dialog example ​

Vue usage ​

Props ​

Events ​

Slots ​

Dialog

Guidelines

Using dialogs

Specifications

Scrolling

Closing

Maximum width and height

Interaction states

Demos

Configurable Dialog

Basic example

With expandable menus

With overflowing content

With stacked actions

With optional Footer Text

With custom Header and Footer

Reusable custom Dialog example

Vue usage

Props

Events

Slots