Sha256: 4529781fcc4a2f114cf4ab3f0438aeab5680d402a491b8e9d9d21ac89ddf3b1c
Contents?: true
Size: 1.35 KB
Versions: 375
Compression:
Stored size: 1.35 KB
Contents
/* global dom */
function noParentScrolled(element, offset) {
element = dom.getComposedParent(element);
while (element && element.nodeName.toLowerCase() !== 'html') {
if (element.scrollTop) {
offset += element.scrollTop;
if (offset >= 0) {
return false;
}
}
element = dom.getComposedParent(element);
}
return true;
}
/**
* Determines if element is off screen
* @method isOffscreen
* @memberof axe.commons.dom
* @instance
* @param {Element} element
* @return {Boolean}
*/
dom.isOffscreen = function(element) {
let leftBoundary;
const docElement = document.documentElement;
const styl = window.getComputedStyle(element);
const dir = window
.getComputedStyle(document.body || docElement)
.getPropertyValue('direction');
const coords = dom.getElementCoordinates(element);
// bottom edge beyond
if (
coords.bottom < 0 &&
(noParentScrolled(element, coords.bottom) || styl.position === 'absolute')
) {
return true;
}
if (coords.left === 0 && coords.right === 0) {
//This is an edge case, an empty (zero-width) element that isn't positioned 'off screen'.
return false;
}
if (dir === 'ltr') {
if (coords.right <= 0) {
return true;
}
} else {
leftBoundary = Math.max(
docElement.scrollWidth,
dom.getViewportSize(window).width
);
if (coords.left >= leftBoundary) {
return true;
}
}
return false;
};
Version data entries
375 entries across 375 versions & 1 rubygems