javascript - 当屏幕尺寸发生变化时，向下滚动过程跟踪线无法正常工作，尤其是对于移动设备

Question

我正在制作一个流程轨迹动画，向下滚动以显示我网站的步骤(教程)。

我正在使用以下 JavaScript 代码来触发动画。

问题是当屏幕尺寸改变时像素计算出错。动画效果不正常，尤其是移动端。我怎样才能使动画响应。

如图所示，当屏幕尺寸改变时，连接 2 和 3 的 div 行没有连接

$(window).scroll(function (event) 
							{
   
							var scroll1 = $(window).scrollTop();
							//document.getElementById('test').innerHTML = scroll1;
	 if( scroll1>1000)
	 {
		$('#step1 #span1').addClass('active');
		$('#bar1').addClass('bar');
		if(scroll1<=1123)
			{
				var x=scroll1-1000;
				//var bar= document.getElementsByClassName("barblue");
				//bar[0].style.height= x+"px";
				//$(".bar").height(x);
				document.getElementById('bar1').style.height= x+"px";
			}
	 }
	 else
	 {
		$('#step1 #span1').removeClass('active');
		$('#bar1').removeClass('bar');
	 }
	 
	 if( scroll1>1123)
	 {
	 $('#step2 #span2').addClass('active');
	 $('#bar2').addClass('bar');
	 if(scroll1<=1300)
			{
				var x2=scroll1-1123;
				 //document.getElementById('scroll').innerHTML = x2;
				document.getElementById('bar2').style.height= x2+"px";
			}
	 }
	 else
	 {
	 $('#step2 #span2').removeClass('active');
	 $('#bar2').removeClass('bar');
	 }
	 
	 if( scroll1>1246)
	 {
	 $('#step3 #span3').addClass('active');
	 }
	 else
	 {
	 $('#step3 #span3').removeClass('active');
	 }
	 
}
);

<div id="container" style="float:left;width:33%;">		


<div id="process-steps">
						<div id="step1" style="padding-left:120px;" class="scroll-no"><span id="span1" >1</span></div>
						
						<div style="padding-left:140px;"><div id="bar1" class=""></div></div>
						
						<div id="step2" style="padding-left:120px;" class="scroll-no"><span id="span2">2</span></div>
						
						<div style="padding-left:140px;"><div id="bar2" class=""></div></div>						
						
						<div id="step3" style="padding-left:120px;" class="scroll-no"><span id="span3">3</span></div>
					</div>
  
  </div>

Answer 1

你可以试试这个:

我不确定

.timeline {
    list-style: none;
    padding: 20px 0 20px;
    position: relative;
}

    .timeline:before {
        top: 0;
        bottom: 0;
        position: absolute;
        content: " ";
        width: 3px;
        background-color: #eeeeee;
        left: 50%;
        margin-left: -1.5px;
    }

    .timeline > li {
        margin-bottom: 20px;
        position: relative;
    }

        .timeline > li:before,
        .timeline > li:after {
            content: " ";
            display: table;
        }

        .timeline > li:after {
            clear: both;
        }

        .timeline > li:before,
        .timeline > li:after {
            content: " ";
            display: table;
        }

        .timeline > li:after {
            clear: both;
        }

        .timeline > li > .timeline-panel {
            width: 46%;
            float: left;
            border: 1px solid #d4d4d4;
            border-radius: 2px;
            padding: 20px;
            position: relative;
            -webkit-box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
        }

            .timeline > li > .timeline-panel:before {
                position: absolute;
                top: 26px;
                right: -15px;
                display: inline-block;
                border-top: 15px solid transparent;
                border-left: 15px solid #ccc;
                border-right: 0 solid #ccc;
                border-bottom: 15px solid transparent;
                content: " ";
            }

            .timeline > li > .timeline-panel:after {
                position: absolute;
                top: 27px;
                right: -14px;
                display: inline-block;
                border-top: 14px solid transparent;
                border-left: 14px solid #fff;
                border-right: 0 solid #fff;
                border-bottom: 14px solid transparent;
                content: " ";
            }

        .timeline > li > .timeline-badge {
            color: #fff;
            width: 50px;
            height: 50px;
            line-height: 50px;
            font-size: 1.4em;
            text-align: center;
            position: absolute;
            top: 16px;
            left: 50%;
            margin-left: -25px;
            background-color: #999999;
            z-index: 100;
            border-top-right-radius: 50%;
            border-top-left-radius: 50%;
            border-bottom-right-radius: 50%;
            border-bottom-left-radius: 50%;
        }

        .timeline > li.timeline-inverted > .timeline-panel {
            float: right;
        }

            .timeline > li.timeline-inverted > .timeline-panel:before {
                border-left-width: 0;
                border-right-width: 15px;
                left: -15px;
                right: auto;
            }

            .timeline > li.timeline-inverted > .timeline-panel:after {
                border-left-width: 0;
                border-right-width: 14px;
                left: -14px;
                right: auto;
            }

.timeline-badge.primary {
    background-color: #2e6da4 !important;
}

.timeline-badge.success {
    background-color: #3f903f !important;
}

.timeline-badge.warning {
    background-color: #f0ad4e !important;
}

.timeline-badge.danger {
    background-color: #d9534f !important;
}

.timeline-badge.info {
    background-color: #5bc0de !important;
}

.timeline-title {
    margin-top: 0;
    color: inherit;
}

.timeline-body > p,
.timeline-body > ul {
    margin-bottom: 0;
}

    .timeline-body > p + p {
        margin-top: 5px;
    }

@media (max-width: 767px) {
    ul.timeline:before {
        left: 40px;
    }

    ul.timeline > li > .timeline-panel {
        width: calc(100% - 90px);
        width: -moz-calc(100% - 90px);
        width: -webkit-calc(100% - 90px);
    }

    ul.timeline > li > .timeline-badge {
        left: 15px;
        margin-left: 0;
        top: 16px;
    }

    ul.timeline > li > .timeline-panel {
        float: right;
    }

        ul.timeline > li > .timeline-panel:before {
            border-left-width: 0;
            border-right-width: 15px;
            left: -15px;
            right: auto;
        }

        ul.timeline > li > .timeline-panel:after {
            border-left-width: 0;
            border-right-width: 14px;
            left: -14px;
            right: auto;
        }
}

Refer this demo page