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82 lines
1.6 KiB
82 lines
1.6 KiB
<script>
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import { createEventDispatcher, onDestroy } from 'svelte';
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const dispatch = createEventDispatcher();
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const close = () => dispatch('close');
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let modal;
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const handle_keydown = e => {
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if (e.key === 'Escape') {
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close();
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return;
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}
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if (e.key === 'Tab') {
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// trap focus
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const nodes = modal.querySelectorAll('*');
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const tabbable = Array.from(nodes).filter(n => n.tabIndex >= 0);
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let index = tabbable.indexOf(document.activeElement);
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if (index === -1 && e.shiftKey) index = 0;
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index += tabbable.length + (e.shiftKey ? -1 : 1);
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index %= tabbable.length;
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tabbable[index].focus();
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e.preventDefault();
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}
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};
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const previously_focused = typeof document !== 'undefined' && document.activeElement;
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if (previously_focused) {
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onDestroy(() => {
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previously_focused.focus();
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});
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}
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</script>
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<svelte:window on:keydown={handle_keydown}/>
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<div class="modal-background" on:click={close}></div>
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<div class="modal" role="dialog" aria-modal="true" bind:this={modal}>
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<slot name="header"></slot>
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<hr>
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<slot></slot>
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<hr>
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<!-- svelte-ignore a11y-autofocus -->
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<button autofocus on:click={close}>close modal</button>
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</div>
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<style>
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.modal-background {
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background: rgba(0,0,0,0.3);
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}
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.modal {
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position: absolute;
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left: 50%;
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top: 50%;
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width: calc(100vw - 4em);
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max-width: 32em;
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max-height: calc(100vh - 4em);
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overflow: auto;
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transform: translate(-50%,-50%);
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padding: 1em;
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border-radius: 0.2em;
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background: white;
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}
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button {
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display: block;
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}
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</style>
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