Decoding mysterious Vue.js attributes ( Vue + Pug ): A comprehensive guide

Recently, while exploring some vue.js code on GitHub HERE, I stumbled upon the following snippet:

menu-dropdown.task-dropdown(
  v-if="!isRunningYesterdailies",
  :right="task.type === 'reward'",
  ref="taskDropdown",
  v-b-tooltip.hover.top="$t('options')"
)

I'm having trouble grasping the purpose of the :right attribute in this code. As someone new to Vue.js, I've managed to find documentation for most attributes used here except for :right. Can anyone provide insight on what exactly it does?

javascriptvue.js

Answer №1

The use of the : symbol before html attributes serves as a shortcut for the v-bind directive. This allows you to assign a variable value to a specific html attribute. For example, 

v-bind:alt="kittenPhotoDescription"
is equivalent to alt:"kittenPhotoDescription".

Check out the documentation here for more information.

Answer №2

My knowledge of Pug is limited, but from what I gather, the provided Pug code generates a menu-dropdown element with specified attributes. The right attribute is linked to a dynamic value from the Vue model by utilizing the v-bind: directive's short form :.

To locate the definition of the menu-dropdown component in the repository you shared, refer to this file: https://github.com/HabitRPG/habitica/blob/develop/website/client/components/ui/customMenuDropdown.vue

In this document, the right attribute is established as a Vue prop:

<script>
export default {
  props: {
    right: Boolean,
    ...

For more information on props, explore the Vue documentation.

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