Vue Academy · Lesson

v-bind Dynamic and Multiple Bindings

Dynamic attribute names :[dynamicAttr], v-bind object syntax, binding multiple attrs at once.

v-bind Dynamic and Multiple Bindings is a free Vue Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Vue Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Binding Attributes Dynamically

The v-bind directive (shorthand :) connects an HTML attribute to a reactive value. It powers dynamic classes, styles, and even dynamically named attributes.

Basic v-bind

Bind any attribute to an expression. When the value changes, Vue updates the attribute.

<img :src="imageUrl" :alt="description" />

Class Binding: Object Syntax

For classes, the object syntax toggles a class based on a truthy value. The key is the class name; the value decides whether it applies.

<div :class="{ active: isActive, disabled: isDisabled }"></div>

Class Binding: Array Syntax

The array syntax applies a list of classes. Mix static strings and reactive variables, or nest an object for conditional entries.

<div :class="[baseClass, isActive ? activeClass : '']"></div>

Combining Array and Object

You can nest the object form inside the array to get the best of both — always-on classes plus conditional ones.

<div :class="[baseClass, { active: isActive }]"></div>

Style Binding: Object Syntax

Bind inline styles with an object. Use camelCase property names (or kebab-case in quotes). Values can be reactive.

<div :style="{ color: textColor, fontSize: size + 'px' }"></div>

Style Binding: Array of Objects

Pass an array of style objects to merge multiple style sources, such as a base style and a theme override.

<div :style="[baseStyles, overrideStyles]"></div>

Binding Many Attributes at Once

v-bind without an argument spreads an entire object of attributes onto the element. Each key becomes an attribute.

<script setup>
const attrs = { id: 'main', class: 'box', 'data-role': 'panel' }
</script>

<template>
  <div v-bind="attrs"></div>
</template>

Dynamic Attribute Names

Use square brackets to compute the attribute name itself at runtime. The bracketed expression is evaluated and used as the attribute key.

<script setup>
const attrName = 'title'
const attrValue = 'Hello'
</script>

<template>
  <div :[attrName]="attrValue"></div>
</template>

When to Use Each

Object class syntax — toggling several classes by condition.
Array class syntax — combining a base class with conditionals.
v-bind="obj" — forwarding a whole set of attributes.
Dynamic name :[name] — when the attribute key is decided at runtime.

A Combined Example

This element uses dynamic class, dynamic style, and spread attributes together — all reactive.

<div
  :class="[base, { active: isActive }]"
  :style="{ color: textColor }"
  v-bind="extraAttrs"
></div>

Quick Check

Test your v-bind knowledge.

Recap

You learned the breadth of v-bind:

Object class syntax toggles classes by condition; array syntax combines them.
Style binding uses objects (camelCase) or arrays of objects.
v-bind="obj" spreads all attributes from an object.
:[name]="val" binds a dynamically named attribute.

Frequently asked questions

Is the “v-bind Dynamic and Multiple Bindings” lesson free?

Yes — the full text of “v-bind Dynamic and Multiple Bindings” is free to read here on the web, and the Vue Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Vue Academy course, upgrade to CoddyKit PRO.

What will I learn in “v-bind Dynamic and Multiple Bindings”?

Dynamic attribute names :[dynamicAttr], v-bind object syntax, binding multiple attrs at once. You practise Vue Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Vue Academy?

No prior experience is required. Vue Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “v-bind Dynamic and Multiple Bindings” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Vue Academy lesson?

Yes. Every Vue Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

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