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

frontend/node_modules/eslint/lib/shared/severity.js

@@ -0,0 +1,49 @@
+/**
+ * @fileoverview Helpers for severity values (e.g. normalizing different types).
+ * @author Bryan Mishkin
+ */
+
+"use strict";
+
+/**
+ * Convert severity value of different types to a string.
+ * @param {string|number} severity severity value
+ * @throws error if severity is invalid
+ * @returns {string} severity string
+ */
+function normalizeSeverityToString(severity) {
+	if ([2, "2", "error"].includes(severity)) {
+		return "error";
+	}
+	if ([1, "1", "warn"].includes(severity)) {
+		return "warn";
+	}
+	if ([0, "0", "off"].includes(severity)) {
+		return "off";
+	}
+	throw new Error(`Invalid severity value: ${severity}`);
+}
+
+/**
+ * Convert severity value of different types to a number.
+ * @param {string|number} severity severity value
+ * @throws error if severity is invalid
+ * @returns {number} severity number
+ */
+function normalizeSeverityToNumber(severity) {
+	if ([2, "2", "error"].includes(severity)) {
+		return 2;
+	}
+	if ([1, "1", "warn"].includes(severity)) {
+		return 1;
+	}
+	if ([0, "0", "off"].includes(severity)) {
+		return 0;
+	}
+	throw new Error(`Invalid severity value: ${severity}`);
+}
+
+module.exports = {
+	normalizeSeverityToString,
+	normalizeSeverityToNumber,
+};