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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | 2x 1x 1x | import $ from 'jquery'; export default function checkInView() { if ($.fn.checkInView) { return; } $.fn.checkInView = function(partial = false) { const elem = this; if (!elem.length) { return false; } const container = elem.parent(); const contHeight = container.height(); container.scrollTop(); const elemTop = elem.offset().top - container.offset().top; const elemBottom = elemTop + elem.height(); const isTotal = elemTop >= 0 && elemBottom <= contHeight; const isPart = (elemTop < 0 && elemBottom > 0 || elemTop > 0 && elemTop <= container.height()) && partial; return isTotal || isPart; }; } |