What are key modifiers?

Peer-reviewed by HireXTech Technical Panel • Updated for 2025/2026 hiring • Editorial standards

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Assesses fundamental understanding of Vue.js conventions, runtime behavior, and memory/performance considerations.

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Comprehensive Model Answer Verified Solution

Vue supports key modifiers on v-on for handling keyboard events. Let's take an example of keyup event with enter
keycode.

<!-- only call `vm.show()` when the `keyCode` is 13 -->
<input v-on:keyup.13="show">

Remembering all the key codes is really difficult. It supports the full list of key codes aliases

Now the above keyup code snippet can be written with aliases as follows,

<input v-on:keyup.enter="submit" />
<!-- OR with shorthand notation -->
<input @keyup.enter="submit" />

Note: The use of keyCode events is deprecated and may not be supported in new browsers.

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