Use tags to wrap the jump object, concatenate strings, ${child.id} carries parameters for the jump
<navigator hover-class="none" :url="`../detail/detail?id=${child.id}`">
<image :src="imgUrl+child.mainimage" mode=""></image>
<text>{
{
child.smalltitle}}</text>
</navigator>
Value to add a parameter to the onLoad life cycle of uni-app, which is the parameter carried
onLoad(option) {
console.log(option.id);
}