What does the custom directive in vue start with?

In Vue, custom directives start with the v- prefix to distinguish them from native Vue directives. They allow developers to extend Vue's functionality and create reusable directives to handle specific tasks.

What does a Vue custom directive start with?

In Vue, a custom directive starts with v Starting with - prefix.

Detailed introduction

Custom directives allow developers to extend the functionality of Vue and create reusable directives to handle specific tasks. Directive names must start with the v- prefix to distinguish them from native Vue directives.

The following is an example of a custom directive:

<code class="js">Vue.directive('focus', {
  // 当指令绑定到元素时执行
  bind(el) {
    el.focus();
  }
});</code>

In this example, the v-focus directive automatically calls its method when bound to an element focus(), this method puts the element in focus.

Naming Convention

The naming convention for custom directives is as follows:

• Use a verb or adjective as the directive name (for example: v-focus, v-validate)
• Keep command names short, descriptive, and easy to understand
• Avoid using generic command names, such as v-on or v-bind as they may conflict with native Vue directives

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