chore: add ts-eslint

.eslintrc

@@ -69,6 +69,22 @@
 			"rules": {
 				"no-console": "off"
 			}
+		},
+		{
+			"files": ["**/*.ts"],
+			"extends": ["plugin:@typescript-eslint/recommended"],
+			"parser": "@typescript-eslint/parser",
+			"plugins": ["@typescript-eslint"],
+			"rules": {
+				"node/no-unsupported-features/es-syntax": "off"
+			}
+		},
+		{
+			"files": ["**/*.d.ts"],
+			"rules": {
+				"@typescript-eslint/no-explicit-any": "off",
+				"@typescript-eslint/no-unused-vars": "off"
+			}
 		}
 	]
 }

index.d.ts

@@ -21,7 +21,7 @@
 /**
  * Container for all registered metrics
  */
 export class Registry<RegistryContentType = PrometheusContentType> {
 	/**
 	 * Get string representation for all metrics
 	 */
@@ -70,7 +70,7 @@
 	 * @param labels of name/value pairs:
 	 * { defaultLabel: "value", anotherLabel: "value 2" }
 	 */
-	setDefaultLabels(labels: Object): void;
+	setDefaultLabels(labels: object): void;
 
 	/**
 	 * Get a string representation of a single metric by name
@@ -148,8 +148,8 @@
 	 *   `registry.getMetricsAsJSON()`.
 	 * @return {Registry} aggregated registry.
 	 */
 	static aggregate<T extends RegistryContentType>(
-		metricsArr: Array<Object>,
+		metricsArr: Array<object>,
 	): Registry<T>; // TODO Promise?
 
 	/**
@@ -183,7 +183,7 @@
  */
 export type Aggregator = 'omit' | 'sum' | 'first' | 'min' | 'max' | 'average';
 
 export enum MetricType {
 	Counter,
 	Gauge,
 	Histogram,
@@ -392,7 +392,7 @@
 	 * @return Function to invoke when timer should be stopped. The value it
 	 * returns is the timed duration.
 	 */
 	startTimer(labels?: LabelValues<T>): (labels?: LabelValues<T>) => number;
 
 	/**
 	 * Return the child for given labels
@@ -506,7 +506,7 @@
 	 * @return Function to invoke when timer should be stopped. The value it
 	 * returns is the timed duration.
 	 */
 	startTimer(labels?: LabelValues<T>): (labels?: LabelValues<T>) => number;
 
 	/**
 	 * Start a timer with exemplar. Calling the returned function will observe the duration in
@@ -519,7 +519,7 @@
 	startTimer(
 		labels?: LabelValues<T>,
 		exemplarLabels?: LabelValues<T>,
 	): (labels?: LabelValues<T>, exemplarLabels?: LabelValues<T>) => number;
 
 	/**
 	 * Reset histogram values
@@ -626,7 +626,7 @@
 	 * @param labels Object with label keys and values
 	 * @return Function to invoke when timer should be stopped
 	 */
 	startTimer(labels?: LabelValues<T>): (labels?: LabelValues<T>) => number;
 
 	/**
 	 * Reset all values in the summary
@@ -770,7 +770,7 @@
 	prefix?: string;
 	gcDurationBuckets?: number[];
 	eventLoopMonitoringPrecision?: number;
-	labels?: Object;
+	labels?: object;
 }
 
 export const collectDefaultMetrics: {

package.json

@@ -34,6 +34,8 @@
 	"homepage": "https://github.com/siimon/prom-client",
 	"devDependencies": {
 		"@clevernature/benchmark-regression": "^1.0.0",
+		"@typescript-eslint/eslint-plugin": "^6.21.0",
+		"@typescript-eslint/parser": "^6.21.0",
 		"eslint": "^8.32.0",
 		"eslint-config-prettier": "^9.1.0",
 		"eslint-plugin-node": "^11.0.0",