<button is="ladda" :loading="isLoading">Submit</button>

vue-ladda.js

import Ladda from 'ladda'
export default {
  props: ['loading'],
  render(h) {
    return h('button', this.$slots.default)
  },
  mounted() {
    this.$el.className += ' ladda-button'
    this.$el['data-spinner-size'] = 35
    this.$el['data-spinner-color'] = '#ffffff'
    this.ladda = Ladda.create(this.$el)
    this.renderLoader()
  },
  methods: {
    renderLoader() {
      if (this.loading == true) {
        !this.ladda.isLoading() && this.ladda.start()
        return
      }
      this.ladda.stop()
    }
  },
  watch: {
    loading(val) {
      this.renderLoader()
    }
  },
  beforeDestroy() {
    this.ladda.remove()
  }
}