1 files changed, 68 insertions, 0 deletions
diff --git a/cli/js/web/error_event.ts b/cli/js/web/error_event.ts
new file mode 100644
index 000000000..fbdd19fb5
--- /dev/null
+++ b/cli/js/web/error_event.ts
@@ -0,0 +1,68 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+import { EventImpl as Event } from "./event.ts";
+import { defineEnumerableProps } from "./util.ts";
+
+export class ErrorEventImpl extends Event implements ErrorEvent {
+  #message: string;
+  #filename: string;
+  #lineno: number;
+  #colno: number;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  #error: any;
+
+  get message(): string {
+    return this.#message;
+  }
+  get filename(): string {
+    return this.#filename;
+  }
+  get lineno(): number {
+    return this.#lineno;
+  }
+  get colno(): number {
+    return this.#colno;
+  }
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  get error(): any {
+    return this.#error;
+  }
+
+  constructor(
+    type: string,
+    {
+      bubbles,
+      cancelable,
+      composed,
+      message = "",
+      filename = "",
+      lineno = 0,
+      colno = 0,
+      error = null,
+    }: ErrorEventInit = {}
+  ) {
+    super(type, {
+      bubbles: bubbles,
+      cancelable: cancelable,
+      composed: composed,
+    });
+
+    this.#message = message;
+    this.#filename = filename;
+    this.#lineno = lineno;
+    this.#colno = colno;
+    this.#error = error;
+  }
+
+  get [Symbol.toStringTag](): string {
+    return "ErrorEvent";
+  }
+}
+
+defineEnumerableProps(ErrorEventImpl, [
+  "message",
+  "filename",
+  "lineno",
+  "colno",
+  "error",
+]);