An Electron 11 titlebar demo using Vue, HTML, SCSS

TitleBarElectron.vue

<template>
  <header class="titlebar">
    <div class="spacer">
      <div :class="maximized ? 'drag drag-max' : 'drag drag-min'"/>
    </div>
    <div class="system-bar">
      <button class="sys-btn" @click.stop="onMinimize()">
        <img src="/caption-buttons.svg#minimize">
      </button>
      <button class="sys-btn" @click.stop="onMaximize()">
        <img :src="maximized ? '/caption-buttons.svg#restore' : '/caption-buttons.svg#maximize'"/>
      </button>
      <button class="sys-btn close-btn" @click.stop="onClose()">
        <img src="/caption-buttons.svg#close">
      </button>
    </div>
  </header>
</template>

<script>
import {remote} from 'electron'

export default {
  name: 'TitleBarElectron',
  data: () => ({
    maximized: remote.getCurrentWindow().isMaximized(),
  }),
  computed: {
    win() {
      return remote.getCurrentWindow()
    },
  },
  methods: {
    onMinimize() {
      this.win.minimize();
    },
    onMaximize() {
      if(this.win.isMaximized()) {
        this.win.unmaximize();
      }
      else {
        this.win.maximize();
      }
    },
    onClose() {
      this.win.close();
    },
  },
  mounted() {
    this.win.on("maximize", () => {
      this.maximized = true
    });

    this.win.on("unmaximize", () => {
      this.maximized = false
    })
  },
}
</script>

<style scoped lang="scss">

.titlebar {
  background: #101010;
  color: #FFFFFF;
  height: 24px;
  overflow: hidden;
  display: flex;

  .system-bar {
    height: inherit;
    align-items: flex-start;
    display: flex;
  }

  .spacer {
    flex-grow: 1;
    position: relative;

    .drag {
      display: block;
      position: absolute;
      -webkit-app-region: drag;
    }

    .drag-min {
      top: 6px;
      left: 6px;
      width: calc(100% - 6px);
      height: calc(100% - 6px);
    }

    .drag-max {
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
  }

  .sys-btn {
    margin: 0;
    padding: 0;
    outline: 0;
    border-radius: 0;
    border-style: none;
    min-width: 32px;
    width: 32px;
    height: 24px;
    font-size: 24px;
    align-items: center;
    justify-content: center;
    display: inline-flex;
    flex: 0 0 auto;
    position: relative;
    text-decoration: none;
    background-color: transparent;
    transition: 0.3s;

    &:last-child {
      margin: 0;
    }
    &:hover {
      background: #303030;
    }
  }

  .close-btn:hover {
    background: #ed4245;
  }
}
</style>