Vue provides two lifecycle hooks that we can use for debugging purposes: onRenderTracked and onRenderTriggered.
These hooks are development-mode-only and not called during server-side rendering.
onRenderTracked
Registers a debug hook to be called when a reactive dependency has been tracked by the component's render effect:
<script setup>
import { ref, onRenderTracked } from 'vue'
const count = ref(0)
const count2 = ref(0)
// Called twice, once for count and once for count2
onRenderTracked((event) => {
console.log(event)
})
</script>
onRenderTriggered
Registers a debug hook to be called when a reactive dependency triggers the component's render effect to be re-run:
<script setup>
import { ref, onRenderTriggered } from 'vue'
const count = ref(0)
// Called when we update count
onRenderTriggered((event) => {
console.log(event)
})
</script>
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