A Popover is a dialog that appears on top of the current page. It can be used for anything, but generally it is used for overflow actions that don't fit in the navigation bar.
There are two ways to use ion-popover: inline or via the popoverController. Each method comes with different considerations, so be sure to use the approach that best fits your use case.
ion-popover can be used by writing the component directly in your template. This reduces the number of handlers you need to wire up in order to present the popover. See Usage for an example of how to write a popover inline.
When using ion-popover with Angular, React, or Vue, the component you pass in will be destroyed when the popover is dismissed. As this functionality is provided by the JavaScript framework, using ion-popover without a JavaScript framework will not destroy the component you passed in. If this is a needed functionality, we recommend using the popoverController instead.
When using inline modals, developers have access to the isOpen property which allows them to control the state of the modal through the state of their application. This is helpful for opening a modal after a state change without needing to explicitly call the present method on ion-modal.
Note that isOpen uses a one way data binding. This means that a reactive variable that sets isOpen to true will not be automatically set to false when the modal dismisses. Developers need to listen for the ionModalDidDismiss or didDismiss events and set the reactive variable to false themselves.
The reason for this is it prevents the internals of ion-modal from being tightly coupled with the state of the application. With a one way data binding, the modal only needs to concern itself with the boolean value that the reactive variable provides. With a two way data binding, the modal needs to concern itself with both the boolean value as well as the existence of the reactive variable itself. This can lead to non-deterministic behaviors and make applications harder to debug.
Since the component you passed in needs to be created when the popover is presented and destroyed when the popover is dismissed, we are unable to project the content using <ng-content> internally. Instead, we use <ng-container> which expects an <ng-template> to be passed in. As a result, when passing in your component you will need to wrap it in an <ng-template>:
Using a popover inline is useful when you do not want to explicitly wire up click events to open the popover. For example, you can use the trigger property to designate a button that should present the popover when clicked. You can also use the trigger-action property to customize whether the popover should be presented when the trigger is left clicked, right clicked, or hovered over.
If you need fine grained control over when the popover is presented and dismissed, we recommend you use the popoverController.
ion-popover can also be presented programmatically by using the popoverController imported from Ionic Framework. This allows you to have complete control over when a popover is presented above and beyond the customization that inline popovers give you. See Usage for an example of how to use the popoverController.
We typically recommend that you write your popovers inline as it streamlines the amount of code in your application. You should only use the popoverController for complex use cases where writing a popover inline is impractical. When using a controller, your popover is not created ahead of time, so properties such as trigger and trigger-action are not applicable here. In addition, nested popovers are not compatible with the controller approach because the popover is automatically added to the root of your application when the create method is called.
Popovers are presented at the root of your application so they overlay your entire app. This behavior applies to both inline popovers and popovers presented from a controller. As a result, custom popover styles can not be scoped to a particular component as they will not apply to the popover. Instead, styles must be applied globally. For most developers, placing the custom styles in global.css is sufficient.
note
If you are building an Ionic Angular app, the styles need to be added to a global stylesheet file. Read Style Placement in the Angular section below for more information.
A trigger for an ion-popover is the element that will open a popover when interacted with. The interaction behavior can be customized by setting the trigger-action property. Note that trigger-action="context-menu" will prevent your system's default context menu from opening. View the Usage section for an example of how to use triggers.
note
Triggers are not applicable when using the popoverController because the ion-popover is not created ahead of time.
When presenting a popover, Ionic Framework needs a reference point to present the popover relative to. With reference="event", the popover will be presented relative to the x-y coordinates of the pointer event that was dispatched on your trigger element. With reference="trigger", the popover will be presented relative to the bounding box of your trigger element.
Regardless of what you choose for your reference point, you can position a popover to the top, right, left, or bottom of your reference point by using the side property. You can also use the start or end values if you would like the side to switch based on LTR or RTL modes.
The alignment property allows you to line up an edge of your popover with a corresponding edge on your trigger element. The exact edge that is used depends on the value of the side property.
If you need finer grained control over the positioning of your popover you can use the --offset-x and --offset-y CSS Variables. For example, --offset-x: 10px will move your popover content to the right by 10px.
When making dropdown menus, you may want to have the width of the popover match the width of the trigger element. Doing this without knowing the trigger width ahead of time is tricky. You can set the size property to 'cover' and Ionic Framework will ensure that the width of the popover matches the width of your trigger element. If you are using the popoverController, you must provide an event via the event option and Ionic Framework will use event.target as the reference element.
When using ion-popover inline, you can nested popovers to create nested dropdown menus. When doing this, only the backdrop on the first popover will appear so that the screen does not get progressively darker as you open more popovers. See the Usage section for an example on how to write a nested popover.
You can use the dismissOnSelect property to automatically close the popover when the popover content has been clicked. This behavior does not apply when clicking a trigger element for another popover.
note
Nested popovers cannot be created when using the popoverController because the popover is automatically added to the root of your application when the create method is called.
Below you will find all of the options available to you when using the popoverController. These options should be supplied when calling popoverController.create().
ion-popover has basic keyboard support for navigating between focusable elements inside of the popover. The following table details what each key does:
Key
Function
Tab
Moves focus to the next focusable element.
Shift + Tab
Moves focus to the previous focusable element.
Esc
Closes the popover.
Space or Enter
Clicks the focusable element.
ion-popover has full arrow key support for navigating between ion-item elements with the button property. The most common use case for this is as a dropdown menu in a desktop-focused application. In addition to the basic keyboard support, the following table details arrow key support for dropdown menus:
Key
Function
ArrowUp
Moves focus to the previous focusable element.
ArrowDown
Moves focus to the next focusable element.
Home
Moves focus to the first focusable element.
End
Moves focus to the last focusable element.
ArrowLeft
When used in a child popover, closes the popover and returns focus to the parent popover.
Space, Enter, and ArrowRight
When focusing a trigger element, opens the associated popover.
<!-- Default --> <ion-popover[isOpen]="true"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- No Arrow --> <ion-popover[isOpen]="true"[arrow]="false"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Use a trigger --> <ion-buttonid="trigger-button">Click to open popover</ion-button> <ion-popovertrigger="trigger-button"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Hover over trigger to open --> <ion-buttonid="hover-button">Hover to open popover</ion-button> <ion-popovertrigger="hover-button"triggerAction="hover"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Show popover above trigger --> <ion-buttonid="side-button">Click to open popover</ion-button> <ion-popovertrigger="side-button"side="top"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Align popover to end of trigger --> <ion-buttonid="alignment-button">Click to open popover</ion-button> <ion-popovertrigger="alignment-button"side="top"alignment="end"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Make popover the same size as the trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"size="cover"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Make popover show relative to click coordinates rather than trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"reference="event"> <ng-template> <ion-content>Popover Content</ion-content> </ng-template> </ion-popover> <!-- Nested Popover --> <ion-buttonid="nested-button">Click to open popover</ion-button> <ion-popovertrigger="nested-button"[dismissOnSelect]="true"> <ng-template> <ion-content> <ion-list> <ion-item[button]="true"[detail]="false"> <ion-label>Option 1</ion-label> </ion-item> <ion-item[button]="true"[detail]="false"> <ion-label>Option 2</ion-label> </ion-item> <ion-item[button]="true"[detail]="true"id="nested-trigger"> <ion-label>Option 3</ion-label> </ion-item> <ion-popovertrigger="nested-trigger"[dismissOnSelect]="true"side="end"> <ng-template> <ion-content> <ion-item[button]="true"> <ion-label>Nested Option</ion-label> </ion-item> </ion-content> </ng-template> </ion-popover> </ion-list> </ion-content> </ng-template> </ion-popover>
In Angular, the CSS of a specific page is scoped only to elements of that page. Even though the Popover can be presented from within a page, the ion-popover element is appended outside of the current page. This means that any custom styles need to go in a global stylesheet file. In an Ionic Angular starter this can be the src/global.scss file or you can register a new global style file by adding to the styles build option in angular.json.
<!-- Default --> <ion-popoveris-open="true"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- No Arrow --> <ion-popoveris-open="true"arrow="false"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Use a trigger --> <ion-buttonid="trigger-button">Click to open popover</ion-button> <ion-popovertrigger="trigger-button"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Hover over trigger to open --> <ion-buttonid="hover-button">Hover to open popover</ion-button> <ion-popovertrigger="hover-button"trigger-action="hover"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Show popover above trigger --> <ion-buttonid="side-button">Click to open popover</ion-button> <ion-popovertrigger="side-button"side="top"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Align popover to end of trigger --> <ion-buttonid="alignment-button">Click to open popover</ion-button> <ion-popovertrigger="alignment-button"side="top"alignment="end"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Make popover the same size as the trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"size="cover"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Make popover show relative to click coordinates rather than trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"reference="event"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Nested Popover --> <ion-buttonid="nested-button">Click to open popover</ion-button> <ion-popovertrigger="nested-button"dismiss-on-select="true"> <ion-content> <ion-list> <ion-itembutton="true"detail="false"> <ion-label>Option 1</ion-label> </ion-item> <ion-itembutton="true"detail="false"> <ion-label>Option 2</ion-label> </ion-item> <ion-itembutton="true"detail="true"id="nested-trigger"> <ion-label>Option 3</ion-label> </ion-item> <ion-popovertrigger="nested-trigger"dismiss-on-select="true"side="end"> <ion-content> <ion-itembutton="true"> <ion-label>Nested Option</ion-label> </ion-item> </ion-content> </ion-popover> </ion-list> </ion-content> </ion-popover>
importReact,{ useState }from'react'; import{IonPopover,IonContent,IonItem,IonLabel,IonButton}from'@ionic/react'; exportconstPopoverExample:React.FC=()=>{ return( <> {/* Default */} <IonPopoverisOpen={true}> <IonContent>PopoverContent</IonContent> </IonPopover> {/* No Arrow */} <IonPopoverisOpen={true}arrow={false}> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Use a trigger */} <IonButtonid="trigger-button">Click to open popover</IonButton> <IonPopovertrigger="trigger-button"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Hover over trigger to open */} <IonButtonid="hover-button">Hover to open popover</IonButton> <IonPopovertrigger="hover-button"triggerAction="hover"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Show popover above trigger */} <IonButtonid="side-button">Click to open popover</IonButton> <IonPopovertrigger="side-button"side="top"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Align popover to end of trigger */} <IonButtonid="alignment-button">Click to open popover</IonButton> <IonPopovertrigger="alignment-button"side="top"alignment="end"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Make popover the same size as the trigger */} <IonButtonid="size-button">Click to open popover</IonButton> <IonPopovertrigger="size-button"size="cover"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Make popover show relative to click coordinates rather than trigger */} <IonButtonid="size-button">Click to open popover</IonButton> <IonPopovertrigger="size-button"reference="event"> <IonContent>PopoverContent</IonContent> </IonPopover> {/* Nested Popover */} <IonButtonid="nested-button">Click to open popover</IonButton> <IonPopovertrigger="nested-button"dismissOnSelect={true}> <IonContent> <ion-list> <IonItembutton={true}detail={false}> <IonLabel>Option1</IonLabel> </IonItem> <IonItembutton={true}detail={false}> <IonLabel>Option2</IonLabel> </IonItem> <IonItembutton={true}detail={true}id="nested-trigger"> <IonLabel>Option3</IonLabel> </IonItem> <IonPopovertrigger="nested-trigger"dismissOnSelect={true}side="end"> <IonContent> <IonItembutton={true}> <IonLabel>NestedOption</IonLabel> </IonItem> </IonContent> </IonPopover> </ion-list> </IonContent> </IonPopover> </> ); };
useIonPopover requires being a descendant of <IonApp>. If you need to use a popover outside of an <IonApp>, consider using the component method instead.
import{Component, h }from'@stencil/core'; @Component({ tag:'popover-example', styleUrl:'popover-example.css' }) exportclassPopoverExample{ render(){ return[ <ion-content> {/* Default */} <ion-popoverisOpen={true}> <ion-content>PopoverContent</ion-content> </ion-popover> {/* No Arrow */} <ion-popoverisOpen={true}arrow={false}> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Use a trigger */} <ion-buttonid="trigger-button">Click to open popover</ion-button> <ion-popovertrigger="trigger-button"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Hover over trigger to open */} <ion-buttonid="hover-button">Hover to open popover</ion-button> <ion-popovertrigger="hover-button"triggerAction="hover"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Show popover above trigger */} <ion-buttonid="side-button">Click to open popover</ion-button> <ion-popovertrigger="side-button"side="top"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Align popover to end of trigger */} <ion-buttonid="alignment-button">Click to open popover</ion-button> <ion-popovertrigger="alignment-button"side="top"alignment="end"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Make popover the same size as the trigger */} <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"size="cover"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Make popover show relative to click coordinates rather than trigger */} <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"reference="event"> <ion-content>PopoverContent</ion-content> </ion-popover> {/* Nested Popover */} <ion-buttonid="nested-button">Click to open popover</ion-button> <ion-popovertrigger="nested-button"dismissOnSelect={true}> <ion-content> <ion-list> <ion-itembutton={true}detail={false}> <ion-label>Option1</ion-label> </ion-item> <ion-itembutton={true}detail={false}> <ion-label>Option2</ion-label> </ion-item> <ion-itembutton={true}detail={true}id="nested-trigger"> <ion-label>Option3</ion-label> </ion-item> <ion-popovertrigger="nested-trigger"dismissOnSelect={true}side="end"> <ion-content> <ion-itembutton={true}> <ion-label>NestedOption</ion-label> </ion-item> </ion-content> </ion-popover> </ion-list> </ion-content> </ion-popover> </ion-content> ]; } }
<template> <!-- Default --> <ion-popover:is-open="true"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- No Arrow --> <ion-popover:is-open="true":arrow="false"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Use a trigger --> <ion-buttonid="trigger-button">Click to open popover</ion-button> <ion-popovertrigger="trigger-button"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Hover over trigger to open --> <ion-buttonid="hover-button">Hover to open popover</ion-button> <ion-popovertrigger="hover-button"trigger-action="hover"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Show popover above trigger --> <ion-buttonid="side-button">Click to open popover</ion-button> <ion-popovertrigger="side-button"side="top"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Align popover to end of trigger --> <ion-buttonid="alignment-button">Click to open popover</ion-button> <ion-popovertrigger="alignment-button"side="top"alignment="end"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Make popover the same size as the trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"size="cover"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Make popover show relative to click coordinates rather than trigger --> <ion-buttonid="size-button">Click to open popover</ion-button> <ion-popovertrigger="size-button"reference="event"> <ion-content>Popover Content</ion-content> </ion-popover> <!-- Nested Popover --> <ion-buttonid="nested-button">Click to open popover</ion-button> <ion-popovertrigger="nested-button":dismiss-on-select="true"> <ion-content> <ion-list> <ion-item:button="true":detail="false"> <ion-label>Option 1</ion-label> </ion-item> <ion-item:button="true":detail="false"> <ion-label>Option 2</ion-label> </ion-item> <ion-item:button="true":detail="true"id="nested-trigger"> <ion-label>Option 3</ion-label> </ion-item> <ion-popovertrigger="nested-trigger":dismiss-on-select="true"side="end"> <ion-content> <ion-item:button="true"> <ion-label>Nested Option</ion-label> </ion-item> </ion-content> </ion-popover> </ion-list> </ion-content> </ion-popover> </template> <script> import{IonButton,IonContent,IonItem,IonLabel,IonPopover}from'@ionic/vue'; import{ defineComponent }from'vue'; exportdefaultdefineComponent({ components:{IonButton,IonContent,IonItem,IonLabel,IonPopover} }); </script>
The component to display inside of the popover. You only need to use this if you are not using a JavaScript framework. Otherwise, you can just slot your component inside of ion-popover.
Attribute
component
Type
Function ๏ฝ HTMLElement ๏ฝ null ๏ฝ string ๏ฝ undefined
The data to pass to the popover component. You only need to use this if you are not using a JavaScript framework. Otherwise, you can just set the props directly on your component.
If true, the popover will open. If false, the popover will close. Use this if you need finer grained control over presentation, otherwise just use the popoverController or the trigger property. Note: isOpen will not automatically be set back to false when the popover dismisses. You will need to do that in your code.
Describes what to position the popover relative to. If 'trigger', the popover will be positioned relative to the trigger button. If passing in an event, this is determined via event.target. If 'event', the popover will be positioned relative to the x/y coordinates of the trigger action. If passing in an event, this is determined via event.clientX and event.clientY.
Describes which side of the reference point to position the popover on. The 'start' and 'end' values are RTL-aware, and the 'left' and 'right' values are not.
Describes how to calculate the popover width. If 'cover', the popover width will match the width of the trigger. If 'auto', the popover width will be determined by the content in the popover.
An ID corresponding to the trigger element that causes the popover to open. Use the trigger-action property to customize the interaction that results in the popover opening.
Describes what kind of interaction with the trigger that should cause the popover to open. Does not apply when the trigger property is undefined. If 'click', the popover will be presented when the trigger is left clicked. If 'hover', the popover will be presented when a pointer hovers over the trigger. If 'context-menu', the popover will be presented when the trigger is right clicked on desktop and long pressed on mobile. This will also prevent your device's normal context menu from appearing.
Present the popover overlay after it has been created. Developers can pass a mouse, touch, or pointer event to position the popover relative to where that event was dispatched.