Like ng, when there is the same data in vue's array, it will report Uncaught (in promise) TypeError
E.g:
<li v-for="item in items">
{
{item.message}}
</li> data:{
items:[
{ message: 'Foo' },
{ message: 'Bar' },
{ message: 'Foo' },
{ message: 'Bar' },
{ message: 'Foo' },
{ message: 'Bar' }
],In this case, an error will be reported, thinking that the items array has the same data, the solution is similar to ng, ng is track by $index, vue is track-by="$index"
<li v-for="item in items" track-by="$index">
{
{item.message}}
</li>If you don't have a unique key to track, you can use track-by="$index", which forces v-for to go into in-place update mode: the segment is not moved, but simply refreshed with the new value of the corresponding index. This mode can handle repeated values in the data array
Note: This article is only some experience in my learning process. If you have any questions, please leave a message to exchange
I hope my experience of entering the pit is helpful to you, may the Holy Light be with you