max

<div id="app">
  <p>{{ arr | max }}</p>
  <p>{{ arr | max(2) }}</p>
</div>

new Vue({
  el: '#app',
  data: {
    arr: [1, 3, 5, 2, 4]
  },
  filters: {
    max(arr, n) {
      if (arr.length < n) {
        throw new Error('Vue.js filter maxの引数が多すぎます')
        return
      } else if (n > 1) {
        let result = []
        while(result.length < n) {
          let max = Math.max(...arr)
          if (~result.indexOf(max)) continue
          result.push(max)
          arr = arr.filter(v => v !== max)
        }
        return result
      } else {
        return Math.max(...arr)
      }
    }
  }
})