如何将Jquery代码转换为React js？

Question

jQuery(document).ready(function($){
    var $timeline_block = $('.cd-timeline-block');

    $timeline_block.each(function(){
        if($(this).offset().top > $(window).scrollTop()+$(window).height()*0.75) {
            $(this).find('.cd-timeline-img, .cd-timeline-content').addClass('is-hidden');
        }
    });

    $(window).on('scroll', function(){
        $timeline_block.each(function(){
            if( $(this).offset().top <= $(window).scrollTop()+$(window).height()*0.75 && $(this).find('.cd-timeline-img').hasClass('is-hidden') ) {
                $(this).find('.cd-timeline-img, .cd-timeline-content').removeClass('is-hidden').addClass('bounce-in');
            }
        });
    });
});