Refactoring rrweb-player (#26)

* enable drag and drop in controller

* setup svelte v3 workflow and entry point

* add ts eslint config and do compatibility fallbacks in API

* rewrite replayer in svelte v3

* fix css import

* fix fullscreen API

src/components/Switch.svelte

@@ -0,0 +1,79 @@
+<script lang="ts">
+  export let disabled: boolean;
+  export let checked: boolean;
+  export let id: string;
+  export let label: string;
+</script>
+
+<style>
+  .switch {
+    height: 1em;
+    display: flex;
+    align-items: center;
+  }
+
+  .switch.disabled {
+    opacity: 0.5;
+  }
+
+  .label {
+    margin: 0 8px;
+  }
+
+  .switch input[type='checkbox'] {
+    position: absolute;
+    opacity: 0;
+  }
+
+  .switch label {
+    width: 2em;
+    height: 1em;
+    position: relative;
+    cursor: pointer;
+    display: block;
+  }
+
+  .switch.disabled label {
+    cursor: not-allowed;
+  }
+
+  .switch label:before {
+    content: '';
+    position: absolute;
+    width: 2em;
+    height: 1em;
+    left: 0.1em;
+    transition: background 0.1s ease;
+    background: rgba(73, 80, 246, 0.5);
+    border-radius: 50px;
+  }
+
+  .switch label:after {
+    content: '';
+    position: absolute;
+    width: 1em;
+    height: 1em;
+    border-radius: 50px;
+    left: 0;
+    transition: all 0.2s ease;
+    box-shadow: 0px 2px 5px 0px rgba(0, 0, 0, 0.3);
+    background: #fcfff4;
+    animation: switch-off 0.2s ease-out;
+    z-index: 2;
+  }
+
+  .switch input[type='checkbox']:checked + label:before {
+    background: rgb(73, 80, 246);
+  }
+
+  .switch input[type='checkbox']:checked + label:after {
+    animation: switch-on 0.2s ease-out;
+    left: 1.1em;
+  }
+</style>
+
+<div class="switch" class:disabled>
+  <input type="checkbox" {id} bind:checked {disabled} />
+  <label for={id} />
+  <span class="label">{label}</span>
+</div>