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[fixed] element with display 'contents' is visible and is tabbable #969

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Merged
merged 1 commit into from
Oct 14, 2022
Merged

[fixed] element with display 'contents' is visible and is tabbable #969

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25 changes: 18 additions & 7 deletions src/helpers/tabbable.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,19 @@
* http://api.jqueryui.com/category/ui-core/
*/

const DISPLAY_NONE = "none";
const DISPLAY_CONTENTS = "contents";

const tabbableNode = /input|select|textarea|button|object|iframe/;

function isNotOverflowing(element, style) {
return (
style.getPropertyValue("overflow") !== "visible" ||
// if 'overflow: visible' set, check if there is actually any overflow
(element.scrollWidth <= 0 && element.scrollHeight <= 0)
);
}

function hidesContents(element) {
const zeroSize = element.offsetWidth <= 0 && element.offsetHeight <= 0;

Expand All @@ -21,11 +32,10 @@ function hidesContents(element) {
try {
// Otherwise we need to check some styles
const style = window.getComputedStyle(element);
const displayValue = style.getPropertyValue("display");
return zeroSize
? style.getPropertyValue("overflow") !== "visible" ||
// if 'overflow: visible' set, check if there is actually any overflow
(element.scrollWidth <= 0 && element.scrollHeight <= 0)
: style.getPropertyValue("display") == "none";
? displayValue !== DISPLAY_CONTENTS && isNotOverflowing(element, style)
: displayValue === DISPLAY_NONE;
} catch (exception) {
// eslint-disable-next-line no-console
console.warn("Failed to inspect element style");
Expand Down Expand Up @@ -68,9 +78,10 @@ export default function findTabbableDescendants(element) {
const descendants = [].slice
.call(element.querySelectorAll("*"), 0)
.reduce(
(finished, el) => finished.concat(
!el.shadowRoot ? [el] : findTabbableDescendants(el.shadowRoot)
),
(finished, el) =>
finished.concat(
!el.shadowRoot ? [el] : findTabbableDescendants(el.shadowRoot)
),
[]
);
return descendants.filter(tabbable);
Expand Down