javascript 检查是否在viewport中 - jQuery

Posted 2021-05-03

function checkIfInViewport(element, callback, direction) {
    $(element).each(function() {
      const divPos = $(this).offset().top;
      const topOfWindow = $(window).scrollTop();
      const windowHeight = $(window).height();
      if (divPos < topOfWindow + windowHeight) {
        callback(this, direction);
      }
    });
  }
}


function bounceInAndSetOpacity(element, direction) {
    $(element)
      .addClass(`animated bounceIn${direction}`)
      .css('opacity', 1);
  }