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Merge pull request #32 from wswebcreation/fix/issue-13-fullpage-scroll
Fix/issue 31 fullpage scroll
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@@ -1,10 +1,18 @@ | ||
/** | ||
* Hide the scrollbars | ||
* | ||
* There is a `try/catch` for this issue | ||
* https://github.com/wswebcreation/webdriver-image-comparison/issues/30 | ||
* Some browsers don't wrap XML into a body element, so this will fail | ||
*/ | ||
export default function hideScrollBars(hide: boolean): void { | ||
if (hide) { | ||
document.body.style.overflow = 'hidden'; | ||
} else { | ||
document.body.style.overflow = ''; | ||
try { | ||
if (hide) { | ||
document.body.style.overflow = 'hidden'; | ||
} else { | ||
document.body.style.overflow = ''; | ||
} | ||
} catch (e) { | ||
// Do nothing | ||
} | ||
} |
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@@ -1,57 +1,8 @@ | ||
/** | ||
* Scroll to a x = 0 and y = variable position in the screen | ||
* Sometimes a scroll can't be done on the window, so the scroll needs to be done on the largest | ||
* element on the screen | ||
* Scroll to y = variable position in the screen | ||
*/ | ||
/* istanbul ignore next */ | ||
export default function scrollToPosition(yPosition: number): void { | ||
const initialScroll = document.documentElement.scrollTop; | ||
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// If for some reason the scroll didn't work, find the first largest element and use that to scroll on | ||
let largestNode: HTMLElement; | ||
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// Scroll with the default way of scrolling | ||
window.scrollTo(0, yPosition); | ||
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/* istanbul ignore else */ | ||
if (initialScroll === document.documentElement.scrollTop && yPosition > 0) { | ||
largestFirstNode(document.documentElement.childNodes).scrollTo(0, yPosition); | ||
} | ||
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/** | ||
* Find the first largest node in the page so it can be used for scrolling | ||
*/ | ||
function largestFirstNode(nodesList: any) { | ||
let node: HTMLElement; | ||
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// Loop over the nodes | ||
for (let i = nodesList.length - 1; i >= 0; i--) { | ||
node = nodesList[i]; | ||
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// Stop if the largest node has been found | ||
/* istanbul ignore next */ | ||
if (largestNode) { | ||
break; | ||
} | ||
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// Check if the element has a scroll / client height | ||
/* istanbul ignore next */ | ||
if (node.scrollHeight && node.clientHeight) { | ||
const viewPortHeight = Math.max(document.documentElement.clientHeight, window.innerHeight || 0); | ||
const elHeight = Math.max(node.scrollHeight, node.clientHeight); | ||
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// If the element is bigger than the viewport, then we got our scroll container | ||
if (elHeight > viewPortHeight) { | ||
largestNode = node; | ||
break; | ||
} | ||
} | ||
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if (node.childNodes.length) { | ||
largestFirstNode(node.childNodes); | ||
} | ||
} | ||
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// If the largestNode is the body then return the window | ||
return (document.body === largestNode || !largestNode) ? window : largestNode; | ||
} | ||
(document.scrollingElement || document.documentElement).scrollTop = yPosition; | ||
} |
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