Updated ProgressEvent to extend Event.

Author: KristofferStrube

src/KristofferStrube.Blazor.FileAPI/ProgressEvent.cs

@@ -1,35 +1,44 @@
-using KristofferStrube.Blazor.WebIDL;
+using KristofferStrube.Blazor.DOM;
+using KristofferStrube.Blazor.WebIDL;
 using Microsoft.JSInterop;
 
 namespace KristofferStrube.Blazor.FileAPI;
 
 /// <summary>
 /// <see href="https://xhr.spec.whatwg.org/#progressevent">ProgressEvent browser specs</see>
 /// </summary>
-public class ProgressEvent : BaseJSWrapper, IJSCreatable<ProgressEvent>
+public class ProgressEvent : Event, IJSCreatable<ProgressEvent>
 {
+    /// <summary>
+    /// A lazily loaded task that evaluates to a helper module instance from the Blazor.FileAPI library.
+    /// </summary>
+    protected readonly Lazy<Task<IJSObjectReference>> fileApiHelperTask;
+
     /// <inheritdoc/>
-    public static async Task<ProgressEvent> CreateAsync(IJSRuntime jSRuntime, IJSObjectReference jSReference)
+    public static new async Task<ProgressEvent> CreateAsync(IJSRuntime jSRuntime, IJSObjectReference jSReference)
     {
         return await CreateAsync(jSRuntime, jSReference, new());
     }
 
     /// <inheritdoc/>
-    public static Task<ProgressEvent> CreateAsync(IJSRuntime jSRuntime, IJSObjectReference jSReference, CreationOptions options)
+    public static new Task<ProgressEvent> CreateAsync(IJSRuntime jSRuntime, IJSObjectReference jSReference, CreationOptions options)
     {
         return Task.FromResult(new ProgressEvent(jSRuntime, jSReference, options));
     }
 
     /// <inheritdoc cref="CreateAsync(IJSRuntime, IJSObjectReference, CreationOptions)"/>
-    protected internal ProgressEvent(IJSRuntime jSRuntime, IJSObjectReference jSReference, CreationOptions options) : base(jSRuntime, jSReference, options) { }
+    protected internal ProgressEvent(IJSRuntime jSRuntime, IJSObjectReference jSReference, CreationOptions options) : base(jSRuntime, jSReference, options)
+    {
+        fileApiHelperTask = new(jSRuntime.GetHelperAsync);
+    }
 
     /// <summary>
     /// Indicates whether the total can be calculated.
     /// </summary>
     /// <returns>A <see langword="bool"/> indicating if the total length was computable.</returns>
     public async Task<bool> GetLengthComputableAsync()
     {
-        IJSObjectReference helper = await helperTask.Value;
+        IJSObjectReference helper = await fileApiHelperTask.Value;
         return await helper.InvokeAsync<bool>("getAttribute", JSReference, "lengthComputable");
     }
 
@@ -39,7 +48,7 @@ public async Task<bool> GetLengthComputableAsync()
     /// <returns>The length of the currently loaded part.</returns>
     public async Task<ulong> GetLoadedAsync()
     {
-        IJSObjectReference helper = await helperTask.Value;
+        IJSObjectReference helper = await fileApiHelperTask.Value;
         return await helper.InvokeAsync<ulong>("getAttribute", JSReference, "loaded");
     }
 
@@ -49,7 +58,19 @@ public async Task<ulong> GetLoadedAsync()
     /// <returns>The total length of the read.</returns>
     public async Task<ulong> GetTotalAsync()
     {
-        IJSObjectReference helper = await helperTask.Value;
+        IJSObjectReference helper = await fileApiHelperTask.Value;
         return await helper.InvokeAsync<ulong>("getAttribute", JSReference, "total");
     }
+
+    /// <inheritdoc/>
+    public new async ValueTask DisposeAsync()
+    {
+        if (fileApiHelperTask.IsValueCreated)
+        {
+            IJSObjectReference module = await helperTask.Value;
+            await module.DisposeAsync();
+        }
+        await base.DisposeAsync();
+        GC.SuppressFinalize(this);
+    }
 }