Vue 3 App experiencing issues displaying Bootstrap 5 offcanvas component

I am currently working on integrating the new offcanvas feature of Bootstrap 5 into my Vue app. I have written the code, and after building the app, I am attempting to test it. However, I am facing an issue where the offcanvas menu is not visible. To keep my app lightweight, I have chosen not to load the JavaScript plugin but instead added the 'show' class using a variable binding to toggle the visibility. Can anyone suggest a solution?

<template>
  <nav class="navbar navbar-collapse bg-light fixed-top">
    <div class="container">
      <span class="float-start">
        <button class="navbar-toggler" type="button" @click.prevent="showOffcanvasMenu()">
          <span class="navbar-toggler-icon"></span>
        </button>
      </span>
    </div>
    <div class="offcanvas offcanvas-start" :class="showMenu ? '' : 'show'" tabindex="-1">
      <div class="offcanvas-header">
        <h5 class="offcanvas-title" id="">Offcanvas with backdrop</h5>
        <button type="button" class="btn-close text-reset" @click.prevent="showOffcanvasMenu()"></button>
      </div>
      <div class="offcanvas-body">
        <p>.....</p>
      </div>
    </div>
  </nav>
  
  <router-view/>
</template>

<script>

export default {
  name: 'App',
  data(){
    return {
      showMenu: false
    }
  },
  methods: {
    showOffcanvasMenu(){
      this.showMenu ? this.showMenu = false : this.showMenu = true;
    }
  }
}
</script>

<style lang="scss">
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
</style>

Answer №1

I've noticed a couple of issues that need addressing.

First and foremost, the conditional logic in the :class attribute is incorrect. It should be:

:class="showMenu ? 'show' : ''" 

Secondly, the main issue lies in simply toggling the show class, which won't effectively control the display of the Offcanvas element. The Offcanvas JS component requires more than just toggling the show class - it also involves changing the visibility property and connecting various other methods/events.

Possible Solutions

1 - One solution could be to avoid using Vue to toggle the Offcanvas element and instead utilize the vanilla JS data-bs- attributes.

Alternatively,

2 - Another approach is to also modify the visibility property of the element based on the value of showMenu...

:style="{ visibility: showMenu ? 'visible' : 'hidden' }

See Demo

Or,

3 - Develop a Vue wrapper component specifically for Bootstrap's Offcanvas functionality.

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