Custom Connection Line
If the default connection lines aren't to your liking, or you want to expand on the existing functionality you can pass a custom connection line component to Vue Flow.
Simply pass a component in the designated template slot, and you're good to go.
<template>
<VueFlow>
<template #connection-line="props">
<MyCustomConnectionLine v-bind="props" />
</template>
</VueFlow>
</template>
You can see a working example in the sandbox.