Get Property

element.businessObject

Update Property

const modeling = bpmnJS.get('modeling');

modeling.updateProperties(sequenceFlowElement, {
  conditionExpression: newCondition
});

Update Color

const modeling = bpmnJS.get('modeling');
modeling.setColor(sequenceFlowElement, {
  fill: '#ccc', // 填充色
  stroke: null。// 边框色和label色
})