统一处理null和undefined

wangzhibo

2021-11-02 8a4b8e1f0fc75d144ef4e48f0d0f9554502b4bf6

1
.cesium-lighter .cesium-timeline-bar{background:linear-gradient(to bottom,#eee 0,#fff 50%,#fafafa 100%)}.cesium-lighter .cesium-timeline-ticLabel{color:#000}.cesium-lighter .cesium-timeline-ticMain{position:absolute;bottom:0;left:0;width:1px;height:50%;background:#000}.cesium-lighter .cesium-timeline-ticSub{background:#444}