Global Layers

Global layers allow you to have custom components that persist across slides. This could be useful for having footers, cross-slide animations, global effects, etc.

Slidev provides three layers for this usage, create global-top.vue, global-bottom.vue or custom-nav-controls.vue under your project root and it will pick up automatically.

There are also layers for each slide: layouts/slide-top.vue and layouts/slide-bottom.vue. The usage is similar to the global layers, but they are applied to every slide, so there may be more than one instance of them.

TIP

When exporting, the --per-slide option should be used to ensure the global layers are applied to each slide correctly.

Layers relationship

At z-axis, from top to bottom:

• NavControls
  • Customized Navigation Controls (custom-nav-controls.vue)
• Global Top (global-top.vue) - single instance
• Slide Top (slide-top.vue) - instance per slide
• Slide Content
• Slide Bottom (slide-bottom.vue) - instance per slide
• Global Bottom (global-bottom.vue) - single instance

Example

<!-- global-bottom.vue -->
<template>
  <footer class="absolute bottom-0 left-0 right-0 p-2">Your Name</footer>
</template>

The text Your Name will appear on all your slides.

<!-- custom-nav-controls -->
<template>
  <button class="icon-btn" title="Next" @click="$nav.next">
    <carbon:arrow-right />
  </button>
</template>

The button Next will appear in NavControls.

To enable it conditionally, you can apply it with the Vue Global Context.

<!-- hide the footer from Page 4 -->
<template>
  <footer
    v-if="$nav.currentPage !== 4"
    class="absolute bottom-0 left-0 right-0 p-2"
  >
    Your Name
  </footer>
</template>

<!-- hide the footer from "cover" layout -->
<template>
  <footer
    v-if="$nav.currentLayout !== 'cover'"
    class="absolute bottom-0 left-0 right-0 p-2"
  >
    Your Name
  </footer>
</template>

<!-- an example footer for pages -->
<template>
  <footer
    v-if="$nav.currentLayout !== 'cover'"
    class="absolute bottom-0 left-0 right-0 p-2"
  >
    {{ $nav.currentPage }} / {{ $nav.total }}
  </footer>
</template>

<!-- custom-nav-controls -->
<!-- hide the button in Presenter model -->
<template>
  <button v-if="!$nav.isPresenter" class="icon-btn" title="Next" @click="$nav.next">
    <carbon:arrow-right />
  </button>
</template>