Final few components

lib/components/base/DropArea.vue

@@ -0,0 +1,87 @@
+<template>
+  <div
+    ref="drop_area"
+    class="drop-area"
+    @drop.stop.prevent="
+      (event) => {
+        $refs.drop_area.style.visibility = 'hidden'
+        if (event.dataTransfer && event.dataTransfer.files && fileAllowed) {
+          $emit('change', event.dataTransfer.files)
+        }
+      }
+    "
+    @dragenter.prevent="allowDrag"
+    @dragover.prevent="allowDrag"
+    @dragleave.prevent="$refs.drop_area.style.visibility = 'hidden'"
+  />
+</template>
+
+<script>
+import { defineComponent } from 'vue'
+
+export default defineComponent({
+  props: {
+    accept: {
+      type: String,
+      default: '',
+    },
+  },
+  emits: ['change'],
+  data() {
+    return {
+      fileAllowed: false,
+    }
+  },
+  mounted() {
+    document.addEventListener('dragenter', this.allowDrag)
+  },
+  methods: {
+    allowDrag(event) {
+      const file = event.dataTransfer?.items[0]
+      if (
+        file &&
+        this.accept
+          .split(',')
+          .reduce((acc, t) => acc || file.type.startsWith(t) || file.type === t || t === '*', false)
+      ) {
+        this.fileAllowed = true
+        event.dataTransfer.dropEffect = 'copy'
+        event.preventDefault()
+        if (this.$refs.drop_area) {
+          this.$refs.drop_area.style.visibility = 'visible'
+        }
+      } else {
+        this.fileAllowed = false
+        if (this.$refs.drop_area) {
+          this.$refs.drop_area.style.visibility = 'hidden'
+        }
+      }
+    },
+  },
+})
+</script>
+<style lang="scss" scoped>
+.drop-area {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  z-index: 10;
+  visibility: hidden;
+  background-color: hsla(0, 0%, 0%, 0.5);
+  transition: visibility 0.2s ease-in-out, background-color 0.1s ease-in-out;
+  display: flex;
+  &::before {
+    --indent: 4rem;
+    content: ' ';
+    position: relative;
+    top: var(--indent);
+    left: var(--indent);
+    width: calc(100% - (2 * var(--indent)));
+    height: calc(100% - (2 * var(--indent)));
+    border-radius: 1rem;
+    border: 0.25rem dashed var(--color-button-bg);
+  }
+}
+</style>