Vuetify — App Bar Behavior

Vuetify is a popular UI framework for Vue apps.

In this article, we’ll look at how to work with the Vuetify framework.

Collapsible Bars

The collapse and collapse-on-scroll props can easily let us control the state of the toolbar that the user interacts with.

For example, we can write:

<template>
  <v-container>
    <v-row class="text-center">
      <v-col col="12">
        <v-card class="overflow-hidden">
          <v-app-bar
            :collapse="!collapseOnScroll"
            :collapse-on-scroll="collapseOnScroll"
            absolute
            color="deep-purple accent-4"
            dark
            scroll-target="#scrolling-techniques-6"
          >
            <v-app-bar-nav-icon></v-app-bar-nav-icon>

            <v-toolbar-title>Collapsing Bar</v-toolbar-title>

            <v-spacer></v-spacer>

            <v-checkbox v-model="collapseOnScroll" color="white" hide-details></v-checkbox>
          </v-app-bar>
          <v-sheet id="scrolling-techniques-6" class="overflow-y-auto" max-height="600">
            <v-container style="height: 1000px;"></v-container>
          </v-sheet>
        </v-card>
      </v-col>
    </v-row>
  </v-container>
</template>

<script>
export default {
  name: "HelloWorld",
  data: () => ({
    collapseOnScroll: false
  }),
};
</script>

to collapse the scroll bar when collapseOnScroll is true .

collapseOnScroll is true when we click check the checkbox.

Elevate Bar on Scroll

The elevate-on-scroll prop with the v-app-bar component.

For example, we can write:

<template>
  <v-container>
    <v-row class="text-center">
      <v-col col="12">
        <v-card class="overflow-hidden">
          <v-app-bar absolute color="white" elevate-on-scroll scroll-target="#scrolling">
            <v-app-bar-nav-icon></v-app-bar-nav-icon>

            <v-toolbar-title>Title</v-toolbar-title>

            <v-spacer></v-spacer>

            <v-btn icon>
              <v-icon>mdi-magnify</v-icon>
            </v-btn>

            <v-btn icon>
              <v-icon>mdi-heart</v-icon>
            </v-btn>

            <v-btn icon>
              <v-icon>mdi-dots-vertical</v-icon>
            </v-btn>
          </v-app-bar>
          <v-sheet id="scrolling" class="overflow-y-auto" max-height="600">
            <v-container style="height: 1500px;"></v-container>
          </v-sheet>
        </v-card>
      </v-col>
    </v-row>
  </v-container>
</template>

<script>
export default {
  name: "HelloWorld",
  data: () => ({}),
};
</script>

We just add the elevate-on-scroll to our v-app-bar to make it show a shadow when we scroll down.

Also, we have to set the scroll-target with the selector of the scroll container to make that work.

Inverted scrolling

The inverted-scroll prop lets us hide the bar until the user scrolls past the designated threshold.

For example, we can write:

<template>
  <v-container>
    <v-row class="text-center">
      <v-col col="12">
        <v-card class="overflow-hidden">
          <v-app-bar
            absolute
            color="primary"
            dark
            inverted-scroll
            scroll-target="#scrolling"
          >
            <v-app-bar-nav-icon></v-app-bar-nav-icon>

            <v-toolbar-title>Title</v-toolbar-title>

            <v-spacer></v-spacer>

            <v-btn icon>
              <v-icon>mdi-magnify</v-icon>
            </v-btn>

            <v-btn icon>
              <v-icon>mdi-heart</v-icon>
            </v-btn>

            <v-btn icon>
              <v-icon>mdi-dots-vertical</v-icon>
            </v-btn>
          </v-app-bar>
          <v-sheet id="scrolling" class="overflow-y-auto" max-height="600">
            <v-container style="height: 1500px;"></v-container>
          </v-sheet>
        </v-card>
      </v-col>
    </v-row>
  </v-container>
</template>

<script>
export default {
  name: "HelloWorld",
  data: () => ({}),
};
</script>

We add the inverted-scroll prop to make the app bar show only when we scroll down.

Conclusion

We can change the behavior of the app bar with various props.