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frontend/node_modules/domexception/lib/DOMException-impl.js

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+"use strict";
+const legacyErrorCodes = require("./legacy-error-codes.json");
+const idlUtils = require("./utils.js");
+
+exports.implementation = class DOMExceptionImpl {
+  constructor(globalObject, [message, name]) {
+    this.name = name;
+    this.message = message;
+  }
+
+  get code() {
+    return legacyErrorCodes[this.name] || 0;
+  }
+};
+
+// A proprietary V8 extension that causes the stack property to appear.
+exports.init = impl => {
+  if (Error.captureStackTrace) {
+    const wrapper = idlUtils.wrapperForImpl(impl);
+    Error.captureStackTrace(wrapper, wrapper.constructor);
+  }
+};