v-bind

v-bind is used to dynamically bind one or more attributes to an expression. It's one of the most fundamental directives in pocket-vue.

Shorthand

The : character is a shorthand for v-bind.

<!-- full syntax -->
<a v-bind:href="url">Link</a>

<!-- shorthand (preferred) -->
<a :href="url">Link</a>

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Attribute Binding

You can bind any HTML attribute to a reactive value. If the bound value is null, undefined, or false, the attribute will be removed.

<div v-scope="{ title: 'Hello World', isDisabled: true }">
  <div :title="title">Hover over me</div>
  <button :disabled="isDisabled">Cannot Click Me</button>
</div>

Boolean Attributes

For boolean attributes like disabled, checked, required, etc., the attribute will be present if the expression is truthy and removed if falsy.

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Class Binding

Object Syntax

Pass an object to :class to dynamically toggle classes. The key is the class name, and the value is a boolean that determines if the class should be applied.

<div :class="{ active: isActive, 'text-danger': hasError }"></div>

Array Syntax

Pass an array of class names. You can also nest objects inside the array.

<div :class="[activeClass, { 'is-loading': isLoading }]"></div>

---

Style Binding

Object Syntax

Pass an object to :style. You can use either camelCase (recommended) or kebab-case for the CSS property names.

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

Array Syntax

Pass an array of style objects to apply multiple sets of styles.

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

CSS Custom Properties

You can also bind to CSS variables.

<div :style="{ '--main-color': color }"></div>

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Modifiers

.camel

The .camel modifier converts the attribute name to camelCase. This is primarily useful for SVG attributes like viewBox.

<!-- Renders as viewBox="0 0 100 100" -->
<svg :view-box.camel="viewBox"></svg>

---

Dynamic Binding of Multiple Attributes

You can bind an entire object of attributes by using v-bind without an argument.

<div v-scope="{ attrObj: { id: 'container', class: 'wrapper' } }">
  <div v-bind="attrObj"></div>
</div>