How can javascript test whether q-drawer is in mobile state?

[CWoodman]

My left drawer has a button to toggle mini mode on/off. But in mobile state, mini has no effect.
I want to re-purpose the button to hide the drawer.
How can I test whether we’re in mobile state or not?
I know there’s a CSS class which is active in mobile, but I don’t know how to test for this since I can’t get the ‘drawer’ element as a ref.

[metalsadman]

@CWoodman use platform detection plugin https://quasar.dev/options/platform-detection#Introduction, you can issue a check for this.$q.platform.is.mobile.

[turigeza]

@metalsadman
I don’t think that solves the issue. But I don’t know a Quasar way of doing this either. this.$q.platform.is.mobile will return true for iPad Pro too which will show you the desktop drawer. The breakpoint is set on the drawer by a custom property breakpoint .

I guess you could check the screen width and compare it your set breakpoint … sort of a hack.

[turigeza]

Drawer seems to have a property belowBreakpoint. Which you could use to determine if the drawer is in belowBreakpoint. I presume this is what you mean when you say in mobile state. But you have to reference the drawer I don’t know why you can not reference the drawer ?

https://codepen.io/turigeza/pen/mdeMQaP?editors=1010

<!--
  Forked from:
  https://quasar.dev/layout/drawer#Example--Mini-mode-with-click-trigger
-->
<div id="q-app">
  <div class="q-pa-md">
    <q-layout view="hHh Lpr lff" container style="height: 300px" class="shadow-2 rounded-borders">
      <q-header elevated class="bg-black">
        <q-toolbar>
          <q-btn flat @click="drawer = !drawer" round dense icon="menu"></q-btn>
          <q-toolbar-title>Header</q-toolbar-title>
        </q-toolbar>
      </q-header>

      <q-drawer
        v-model="drawer"
        show-if-above

        :mini="!drawer || miniState"
        @click.capture="drawerClick"

        :width="200"
        :breakpoint="500"
        bordered
        content-class="bg-grey-3"
        ref="drawer"
      >
        <q-scroll-area class="fit">
          <q-list padding>
            <q-item clickable v-ripple>
              <q-item-section avatar>
                <q-icon name="inbox"></q-icon>
              </q-item-section>

              <q-item-section>
                Inbox
              </q-item-section>
            </q-item>

            <q-item active clickable v-ripple>
              <q-item-section avatar>
                <q-icon name="star"></q-icon>
              </q-item-section>

              <q-item-section>
                Star
              </q-item-section>
            </q-item>

            <q-item clickable v-ripple>
              <q-item-section avatar>
                <q-icon name="send"></q-icon>
              </q-item-section>

              <q-item-section>
                Send
              </q-item-section>
            </q-item>

            <q-item clickable v-ripple>
              <q-item-section avatar>
                <q-icon name="drafts"></q-icon>
              </q-item-section>

              <q-item-section>
                Drafts
              </q-item-section>
            </q-item>
          </q-list>
        </q-scroll-area>

        <!--
          in this case, we use a button (can be anything)
          so that user can switch back
          to mini-mode
        -->
        <div class="q-mini-drawer-hide absolute" style="top: 15px; right: -17px">
          <q-btn
            dense
            round
            unelevated
            color="accent"
            icon="chevron_left"
            @click="miniState = true"
          ></q-btn>
        </div>
      </q-drawer>

      <q-page-container>
        <q-page class="q-px-lg q-py-md">
          <q-btn label="Is it belowBreakpoint?" @click="printRef"></q-btn>
          
        </q-page>
      </q-page-container>
    </q-layout>
  </div>
</div>

new Vue({
  el: '#q-app',
  data () {
    return {
      drawer: false,
      miniState: false
    }
  },

  methods: {
    printRef(){
      alert(this.$refs.drawer.belowBreakpoint);
    },
    drawerClick (e) {
      // if in "mini" state and user
      // click on drawer, we switch it to "normal" mode
      if (this.miniState) {
        this.miniState = false

        // notice we have registered an event with capture flag;
        // we need to stop further propagation as this click is
        // intended for switching drawer to "normal" mode only
        e.stopPropagation()
      }
    }
  }
})

[CWoodman]

turigeza that’s perfect! Thanks.