routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/eslint-plugin-unicorn/rules/prefer-event-target.js

@@ -0,0 +1,119 @@
+import {findVariable} from '@eslint-community/eslint-utils';
+import {getAncestor} from './utils/index.js';
+import {isStaticRequire, isStringLiteral, isMemberExpression} from './ast/index.js';
+
+const MESSAGE_ID = 'prefer-event-target';
+const messages = {
+	[MESSAGE_ID]: 'Prefer `EventTarget` over `EventEmitter`.',
+};
+
+const packagesShouldBeIgnored = new Set([
+	'@angular/core',
+	'eventemitter3',
+]);
+
+const isConstVariableDeclarationId = node =>
+	node.parent.type === 'VariableDeclarator'
+	&& node.parent.id === node
+	&& node.parent.parent.type === 'VariableDeclaration'
+	&& node.parent.parent.kind === 'const'
+	&& node.parent.parent.declarations.includes(node.parent);
+
+function isAwaitImportOrRequireFromIgnoredPackages(node) {
+	if (!node) {
+		return false;
+	}
+
+	let source;
+	if (isStaticRequire(node)) {
+		[source] = node.arguments;
+	} else if (node.type === 'AwaitExpression' && node.argument.type === 'ImportExpression') {
+		({source} = node.argument);
+	}
+
+	if (isStringLiteral(source) && packagesShouldBeIgnored.has(source.value)) {
+		return true;
+	}
+
+	return false;
+}
+
+function isFromIgnoredPackage(node) {
+	if (!node) {
+		return false;
+	}
+
+	const importDeclaration = getAncestor(node, 'ImportDeclaration');
+	if (packagesShouldBeIgnored.has(importDeclaration?.source.value)) {
+		return true;
+	}
+
+	// `const {EventEmitter} = ...`
+	if (
+		node.parent.type === 'Property'
+		&& node.parent.value === node
+		&& node.parent.key.type === 'Identifier'
+		&& node.parent.key.name === 'EventEmitter'
+		&& node.parent.parent.type === 'ObjectPattern'
+		&& node.parent.parent.properties.includes(node.parent)
+		&& isConstVariableDeclarationId(node.parent.parent)
+		&& isAwaitImportOrRequireFromIgnoredPackages(node.parent.parent.parent.init)
+	) {
+		return true;
+	}
+
+	// `const EventEmitter = (...).EventEmitter`
+	if (
+		isConstVariableDeclarationId(node)
+		&& isMemberExpression(node.parent.init, {property: 'EventEmitter', optional: false, computed: false})
+		&& isAwaitImportOrRequireFromIgnoredPackages(node.parent.init.object)
+	) {
+		return true;
+	}
+
+	return false;
+}
+
+/** @param {import('eslint').Rule.RuleContext} context */
+const create = context => {
+	context.on('Identifier', node => {
+		if (!(
+			node.name === 'EventEmitter'
+			&& (
+				(
+					(node.parent.type === 'ClassDeclaration' || node.parent.type === 'ClassExpression')
+					&& node.parent.superClass === node
+				)
+				|| (node.parent.type === 'NewExpression' && node.parent.callee === node)
+			)
+		)) {
+			return;
+		}
+
+		const scope = context.sourceCode.getScope(node);
+		const variableNode = findVariable(scope, node)?.defs[0]?.name;
+		if (isFromIgnoredPackage(variableNode)) {
+			return;
+		}
+
+		return {
+			node,
+			messageId: MESSAGE_ID,
+		};
+	});
+};
+
+/** @type {import('eslint').Rule.RuleModule} */
+const config = {
+	create,
+	meta: {
+		type: 'suggestion',
+		docs: {
+			description: 'Prefer `EventTarget` over `EventEmitter`.',
+			recommended: 'unopinionated',
+		},
+		messages,
+	},
+};
+
+export default config;