Phenomenon problem:
Here, 0-59 is rendered through v-for, so the label selects i-1 to make the content appear 0:
However, the reality is: the case of lebel = 0 cannot be rendered. The reason may be that elementui has dealt with the case of label=0.
problem solved:
Directly place the content to be displayed between the tags, and then
display it through { {}}
Result: it is rendered.