<div class="app-container" :class="isFullscreen?'myin':''" id="myImg" style="background-color: white;">
   <div class="right-menu">
      <svg-icon class="right-menu-item hover-effect" :icon-class="isFullscreen?'exit-fullscreen':'fullscreen'"
        @click="click" />
   </div>
</div>
//方法
click() {
        if (!screenfull.isEnabled) {
          this.$message({
            message: '你的浏览器不支持全屏',
            type: 'warning'
          })
          return false
        }
        screenfull.toggle(this.$refs.myImg);
      },