EvanHerman
/ check-if-element-in-viewport-on-scroll.js
Last active
May 31, 2023 13:23
Check when an element comes into view (jQuery)
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| function isOnScreen(elem) { | |
| // if the element doesn't exist, abort | |
| if( elem.length == 0 ) { | |
| return; | |
| } | |
| var $window = jQuery(window) | |
| var viewport_top = $window.scrollTop() | |
| var viewport_height = $window.height() | |
| var viewport_bottom = viewport_top + viewport_height | |
| var $elem = jQuery(elem) |
rauschma
/ callbacks-promises-asyncfuncs.js
Last active
March 13, 2023 12:22
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| // From callbacks to Promises to async functions | |
| function callbackFunc(x, callback) { | |
| f1(x, (err1, result1) => { | |
| if (err1) { | |
| console.error(err1); | |
| callback(err1); | |
| return; | |
| } | |
| f2(result1, (err2, result2) => { |