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0

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VueJS conditionally add an attribute for an element

In VueJS we can add or remove a DOM element using v-if:

<button v-if="isRequired">Important Button</button>

but is there a way to add / remove attributes of a dom element eg for the following conditionally set the required attribute:

Username: <input type="text" name="username" required>

by something similar to:

Username: <input type="text" name="username" v-if="name.required" required>

Any ideas?

over 4 years ago · Santiago Trujillo
3 answers
Answer question

0

Try:

<input :required="test ? true : false">

Update: It has changed in Vue 3, see this answer https://stackoverflow.com/a/64598898

over 4 years ago · Santiago Trujillo Report

0

Simplest form:

<input :required="test">   // if true
<input :required="!test">  // if false
<input :required="!!test"> // test ? true : false
over 4 years ago · Santiago Trujillo Report

0

Conditional rendering of attributes changed in Vue 3. To omit an attribute use null or undefined.

Vue 2:

<div :attr="false">
Result: <div>

<div :attr="null">
Result: <div>

Vue 3:

<div :attr="false">
Result: <div attr="false">

<div :attr="null">
Result: <div>
over 4 years ago · Santiago Trujillo Report
Answer question
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