解决vue vue.runtime.esm.js?2b0e:619 [Vue warn]: Error in nextTick: “TypeError: Cannot convert undefine

报错 这是因为 数据还没到先显示了,图标是表单的时候 

Vue warn]: Invalid prop: type check failed for prop "end". Expected Number with value 0, got String with value "".

Vue warn]: Invalid prop: type check failed for prop "end". Expected Number with value 0, got String with value "".

 设置有值之后再显示就好了

value="barData?barData:''" 这样也会报错的    只有 v-if 可以