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Vue Tip: Trigger Watcher Immediately

MH

Michael Hoffmann

@mokkapps

Vue Tip: Trigger Watcher Immediately Image

The watch hook provides an option that its callback function is called immediately:

<template>
  <input v-model="counter" />
</template>

<script setup>
import { ref, watch } from 'vue'

const counter = ref(0)

watch(
  counter,
  (newValue, oldValue) => {
    console.log('The new counter value is: ' + counter.value)
  },
  { immediate: true }
)
</script>

This code will generate the output New counter value is: 0 after the setup method is executed initially. It will also create a log message for all subsequent counter-value changes.

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