add reusable progress-button cmoponent

src/components/progress_button/progress_button.vue

@@ -0,0 +1,35 @@
+<template>
+  <button :disabled="progress || disabled" @click="onClick">
+    <template v-if="progress">
+      <slot name="progress" />
+    </template>
+    <template v-else>
+      <slot />
+    </template>
+  </button>
+</template>
+
+<script>
+export default {
+  props: {
+    disabled: {
+      type: Boolean
+    },
+    click: {
+      type: Function,
+      default: () => Promise.resolve()
+    }
+  },
+  data () {
+    return {
+      progress: false
+    }
+  },
+  methods: {
+    onClick () {
+      this.progress = true
+      this.click().then(() => { this.progress = false })
+    }
+  }
+}
+</script>