commit 50029cd46cb729928f4a917046532e025424b546 · kitten.sh/use-interactions

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src/__tests__/useDismissable.test.tsx

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       import React, { useState, useRef } from 'react';

     

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       import { mount } from '@cypress/react';

     

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       import { useDismissable } from '../useDismissable';

     

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       const Dialog = ({ focusLoss }: { focusLoss?: boolean }) => {

     

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         const [visible, setVisible] = useState(true);

     

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         const ref = useRef<HTMLDivElement>(null);

     

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         const onDismiss = () => setVisible(false);

     

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         useDismissable(ref, onDismiss, { focusLoss, disabled: !visible });

     

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         return (

     

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           <div ref={ref} role="dialog" style={{ display: visible ? 'block' : 'none' }}>

     

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             <button className="inside">focusable</button>

     

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           </div>

     

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         );

     

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       };

     

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       it('is dismissed by clicking outside', () => {

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').click();

     

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         cy.get('@inside').should('be.visible');

     

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         cy.get('.outside').first().click();

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

     

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       it('is not dismissed by clicking outside when it does not have priority', () => {

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog />

     

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             <Dialog />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').should('be.visible');

     

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         // at first not dismissed

     

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         cy.get('.outside').first().click();

     

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         cy.get('@inside').should('be.visible');

     

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         // dismissed when the second Dialog loses focus

     

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         cy.get('.outside').first().click();

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

     

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       it('is dismissed by pressing Escape', () => {

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').should('be.visible');

     

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         cy.realPress('Escape');

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

     

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       it('is not dismissed by pressing Escape when it does not have priority', () => {

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog />

     

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             <Dialog />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').should('be.visible');

     

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         // at first not dismissed

     

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         cy.realPress('Escape');

     

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         cy.get('@inside').should('be.visible');

     

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         // dismissed when the second Dialog loses focus

     

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         cy.realPress('Escape');

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

     

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       it('is dismissed without priority when it has focus', () => {

     

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         const Second = () => {

     

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           const ref = useRef<HTMLDivElement>(null);

     

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           useDismissable(ref, () => {});

     

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           return <div ref={ref} />;

     

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         };

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog />

     

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             <Second />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').should('be.visible');

     

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         // not dismissed with escape press

     

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         cy.realPress('Escape');

     

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         cy.get('@inside').should('be.visible');

     

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         // is dismissed when it has focus

     

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         cy.get('@inside').focus();

     

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         cy.realPress('Escape');

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

     

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       it('is dismissed when focus moves out of it, with focus loss active', () => {

     

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         mount(

     

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           <main>

     

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             <button className="outside">outside</button>

     

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             <Dialog focusLoss />

     

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           </main>

     

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         );

     

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         cy.get('.inside').as('inside').should('be.visible');

     

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         cy.get('@inside').focus();

     

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         cy.get('@inside').should('be.visible');

     

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         // is dismissed when it loses focus

     

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         cy.realPress(['Shift', 'Tab']);

     

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         cy.focused().contains('outside');

     

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         cy.get('@inside').should('not.be.visible');

     

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       });

+14 -6

src/useDismissable.ts

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       import { useRef } from 'react';

     

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       import { useLayoutEffect } from './utils/react';

     

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       import { contains } from './utils/element';

     

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       import { makePriorityHook } from './usePriority';

     
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       export interface DismissableOptions {

     

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         focusLoss?: boolean;

     

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         disabled?: boolean;

     

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       }

     

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       export function useDismissable<T extends HTMLElement>(

     
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         options?: DismissableOptions

     

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       ) {

     

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         const focusLoss = !!(options && options.focusLoss);

     

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         const hasPriority = usePriority(ref);

     

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         const disabled = !!(options && options.disabled);

     

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         const hasPriority = usePriority(ref, disabled);

     

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         const onDismissRef = useRef(onDismiss);

     

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         useLayoutEffect(() => {

     

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           if (!ref.current || !hasPriority) return;

     

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           onDismissRef.current = onDismiss;

     

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         }, [onDismiss]);

     

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         useLayoutEffect(() => {

     

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           if (!ref.current || disabled) return;

     

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           function onFocusOut(event: FocusEvent) {

     

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             if (event.defaultPrevented) return;

     
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               contains(ref.current, target) &&

     

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               !contains(ref.current, relatedTarget)

     

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             ) {

     

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               onDismiss();

     

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               onDismissRef.current();

     

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             }

     

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           }

     

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               const active = document.activeElement;

     

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               if (hasPriority || (active && contains(ref.current, active))) {

     

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                 event.preventDefault();

     

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                 onDismiss();

     

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                 onDismissRef.current();

     

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               }

     

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             }

     

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           }

     
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             const active = document.activeElement;

     

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             if (hasPriority || (active && contains(ref.current, active))) {

     

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               event.preventDefault();

     

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               onDismiss();

     

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               onDismissRef.current();

     

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             }

     

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           }

     

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             document.removeEventListener('touchstart', onClick);

     

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             document.removeEventListener('keydown', onKey);

     

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           };

     

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         }, [ref, hasPriority, focusLoss, onDismiss]);

     

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         }, [ref, hasPriority, disabled, focusLoss]);

     

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       }