Vue

by Alex Kyriakidis

HTML

<div id="app">
  <h1 v-switching-color:slow="['gold', 'blue', 'purple']">Vue School</h1>
  <h1 v-switching-color:crazy="['gold', 'blue', 'purple']">Vue School</h1>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h1 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

Vue.directive('switching-color', function (el, binding) {
    const speeds = {
      slow: 1000,
      normal: 800,
      fast: 500,
            crazy: 100
    }
    const speedName = binding.arg || 'normal'
    const speed = speeds[speedName] 
    const colors = binding.value
    const limit = colors.length - 1
    let i = 0
    setInterval(() => {
      console.log('coloring')
      el.style.color = colors[i++]
      if (i > limit) {
        i = 0
      }
    }, speed)    
  }
)


new Vue({
  el: "#app",
  data: {}
})