f9506affb5
* Add JS tips section to frontend documentation
* Replace document.getElementsByTagName('body') with document.body
* Replace querySelectorAll with faster selecting methods where appropriate
* Replace querySelector with faster selecting methods where appropriate
* Fix typo
* Fix forEach and getElementsByClassName
* Change querySelector* to faster methods in erb files
* Change querySelector* to faster methods in ruby files
* Fix runkit tag
* Various fixes
* Update app/assets/javascripts/initializers/initializeEllipsisMenu.js
Co-authored-by: Ridhwana <Ridhwana.Khan16@gmail.com>
* Update app/assets/javascripts/utilities/slideSidebar.js
Co-authored-by: Ridhwana <Ridhwana.Khan16@gmail.com>
* Commenting out flaky spec
Co-authored-by: Ridhwana <Ridhwana.Khan16@gmail.com>
24 lines
849 B
JavaScript
24 lines
849 B
JavaScript
/**
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* Checks if an element is visible in the viewport
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*
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* @example
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* const element = document.getElementById('element');
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* isInViewport(element); // true or false
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*
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* @param {object} element - The HTML element to check
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* @param {number} [offsetTop=0] - Part of the screen to ignore counting from the top
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*
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* @returns {boolean} isInViewport - true if the element is visible in the viewport
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*/
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export function isInViewport(element, offsetTop = 0) {
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const boundingRect = element.getBoundingClientRect();
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const clientHeight =
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window.innerHeight || document.documentElement.clientHeight;
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const clientWidth = window.innerWidth || document.documentElement.clientWidth;
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return (
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boundingRect.top >= offsetTop &&
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boundingRect.left >= 0 &&
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boundingRect.bottom <= clientHeight &&
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boundingRect.right <= clientWidth
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);
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}
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