Cesium label 换行

字符串中加换行符 "\n"

label:{
              //文字标签
              text: new Cesium.CallbackProperty((result) => {
                let textTipsArr = textTips;
                if (textTipsArr.length > 10) {
                //模拟文字换行，将字符串拆成两段
                  let a = textTipsArr.slice(0, 8);
                  let b = textTipsArr.slice(8);
                  result = a + "\n" + b
                } else {
                  result = textTipsArr
                }
                return result;
              },false),
              // text: ''+textTips,
              font: '500 30px Helvetica',// 15pt monospace
              scale: 0.6,
              style: Cesium.LabelStyle.FILL,
              fillColor: Cesium.Color.WHITE,
              pixelOffset: new Cesium.Cartesian2(7, 13), //偏移量 
              showBackground: true,
              backgroundColor: new Cesium.Color.fromCssColorString('#6ab4fff2'),
              maximumScale: 0.6,
              minimumScale: 0.6,
              disableDepthTestDistance:99000000,
              heightReference:Cesium.HeightReference.CLAMP_TO_GROUND,
 }