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Vueframework~5 mins

v-model for two-way binding in Vue - Cheat Sheet & Quick Revision

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Recall & Review
beginner
What is v-model in Vue?

v-model is a directive in Vue that creates a two-way binding between form input elements and component data. It keeps the data and the input in sync automatically.

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beginner
How does v-model simplify handling user input?

Instead of writing separate code to listen for input events and update data, v-model automatically updates the data when the user types and updates the input if the data changes.

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beginner
Which HTML elements commonly use v-model for two-way binding?

Common elements are <input> (text, checkbox, radio), <textarea>, and <select>. v-model works with these to sync user input with data.

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intermediate
How do you use v-model with a custom component?

You define a modelValue prop and emit an update:modelValue event. Then v-model binds to modelValue and listens for the event to update the data.

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beginner
What happens if you change the data bound by v-model programmatically?

The input element updates automatically to reflect the new data value. This shows the two-way binding keeps data and UI in sync both ways.

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What does v-model do in Vue?
AOnly updates input when data changes
BCreates two-way binding between data and input
COnly updates data when input changes
DBinds CSS classes to elements
Which event does v-model listen to on a text input by default?
Ainput
Bsubmit
Cchange
Dclick
How do you bind v-model to a custom component's value?
AUse <code>value</code> prop and <code>input</code> event
BUse <code>v-on</code> only
CUse <code>v-bind</code> only
DUse <code>modelValue</code> prop and <code>update:modelValue</code> event
Which of these elements does NOT support v-model by default?
A<code>&lt;input type='text'&gt;</code>
B<code>&lt;select&gt;</code>
C<code>&lt;div&gt;</code>
D<code>&lt;textarea&gt;</code>
If you update the data bound by v-model in code, what happens to the input?
AInput updates to new data value
BInput stays the same
CInput clears
DInput disables
Explain how v-model creates two-way binding in Vue and why it is useful.
Think about how data and input stay in sync automatically.
You got /4 concepts.
    Describe how to implement v-model on a custom Vue component.
    Vue 3 uses a special prop and event for custom components.
    You got /4 concepts.