In Vue.js, controlling the disabled state of a button is a common UI task especially for forms, validations, or async operations. Vue makes this easy using the :disabled directive, which binds a Boolean condition to the button’s disabled attribute.
Disable Button Based on Data or State
You can bind the disabled attribute to a ref or data property.
Example – Toggle Button Enabled State
<!– ToggleButton.vue –><script setup>import { ref } from ‘vue’;
const isDisabled = ref(true);
function toggleButton() {
isDisabled.value = !isDisabled.value;
}
</script>
<template>
<button :disabled=”isDisabled”>Click Me</button>
<br />
<button @click=”toggleButton”>
Toggle Disabled State
</button>
</template>
Disable Button During Form Validation
Use a computed property to determine if a form is valid, and disable the submit button accordingly.
Example – Basic Validation
<!– FormValidation.vue –><script setup>
import { ref, computed } from ‘vue’;
const name = ref(”);
const email = ref(”);
const isFormValid = computed(() => {
return name.value.trim() !== ” && email.value.includes(‘@’);
});
</script>
<template>
<input v-model=”name” placeholder=”Name” />
<input v-model=”email” placeholder=”Email” />
<button :disabled=”!isFormValid”>Submit</button>
</template>
Disable Button While Async Operation is in Progress
Useful when submitting forms, uploading files, or calling APIs.
Example – Simulate API Call
<!– AsyncButton.vue –><script setup>
import { ref } from ‘vue’;
const loading = ref(false);
function handleClick() {
loading.value = true;
// Simulate async operation
setTimeout(() => {
alert(‘Done!’);
loading.value = false;
}, 2000);
}
</script>
<template>
<button :disabled=”loading” @click=”handleClick”>
{{ loading ? ‘Processing…’ : ‘Submit’ }}
</button>
</template>
Also Read: The Vue JS Best Practices In Detail
Best Practices
- Use :disabled with reactive data or computed properties.
- Provide visual feedback (e.g., spinner or text change) during loading.
- Always handle edge cases where a button may be unintentionally re-enabled too soon.
Key Takeaway
To disable buttons in Vue.js, bind the disabled attribute to a reactive variable or computed condition using :disabled. This ensures your UI reflects the latest logic based on user input, loading states, or validation rules.
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