@aurelia-mdc-web/base
Version:
Base classes for Aurelia Material Components Web
36 lines • 2.04 kB
JavaScript
import { __read, __spreadArray } from "tslib";
export function nextElement(element, reverse) {
/*check if an element is defined or use activeElement*/
var activeElem = element instanceof HTMLElement ? element : document.activeElement;
if (!activeElem) {
return;
}
var queryString = [
'a:not([disabled]):not([tabindex="-1"])',
'button:not([disabled]):not([tabindex="-1"])',
'input:not([disabled]):not([tabindex="-1"]):not(.mdc-text-field__input)',
'.mdc-text-field',
'select:not([disabled]):not([tabindex="-1"])',
'[tabindex]:not([disabled]):not([tabindex="-1"])'
/* add custom queries here */
].join(','), queryResult = Array.from(document.querySelectorAll(queryString)).filter(function (elem) {
/*check for visibility while always include the current activeElement*/
return elem.offsetWidth > 0 || elem.offsetHeight > 0 || elem === activeElem;
}), indexedList = queryResult.slice().filter(function (elem) {
/* filter out all indexes not greater than 0 */
return elem.tabIndex == 0 || elem.tabIndex == -1 ? false : true;
}).sort(function (a, b) {
/* sort the array by index from smallest to largest */
return a.tabIndex != 0 && b.tabIndex != 0
? (a.tabIndex < b.tabIndex ? -1 : b.tabIndex < a.tabIndex ? 1 : 0)
: a.tabIndex != 0 ? -1 : b.tabIndex != 0 ? 1 : 0;
}), focusable = __spreadArray(__spreadArray([], __read(indexedList), false), __read(queryResult.filter(function (elem) {
/* filter out all indexes above 0 */
return elem.tabIndex == 0 || elem.tabIndex == -1 ? true : false;
})), false);
/* if reverse is true return the previous focusable element
if reverse is false return the next focusable element */
return reverse ? (focusable[focusable.indexOf(activeElem) - 1] || focusable[focusable.length - 1])
: (focusable[focusable.indexOf(activeElem) + 1] || focusable[0]);
}
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