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                <!-- Use preprocessors via the lang attribute! e.g. <template lang="pug"> -->
  <div id="app">
    <div class="btn-action">
      <label v-for="item in modes" :key='item'>
        <input type="radio" name="mode" :value="item" v-model="active" />
        mask-mode: {{item}}
    <div id="masked" :style="{'mask-mode':active}"></div>

export default {
  data() {
    return {

<!-- Use preprocessors via the lang attribute! e.g. <style lang="scss"> -->
<style lang='stylus'>
$mask = ""
  width: 227px
  height: 200px
  background blue linear-gradient(red, blue)
  -webkit-mask-image url($mask)
  mask-image url($mask)
  padding 20px
  display flex
  align-items stretch
  width 250px
  padding-right 30px
  display flex
  flex-wrap wrap
  gap 10px 0
    width 100%
    border 2px solid red
    display flex
    align-items center
    cursor pointer