as follows, a simple component, data does not have return because it does not need data.
<template>
<div>A</div>
</template>
<script type="text/javascript">
export default {
name: "app",
data() {
// return;
}
}
</script>then switch from this page (which contains only this component) to another page and report an error:
Why?
to
export default {
name: 'app',
data() {
return {}
}
}or
export default {
name: 'app'
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