Add components

slider/node_modules/eslint/lib/rules/no-empty.js

@@ -0,0 +1,153 @@
+/**
+ * @fileoverview Rule to flag use of an empty block statement
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		hasSuggestions: true,
+		type: "suggestion",
+
+		defaultOptions: [
+			{
+				allowEmptyCatch: false,
+			},
+		],
+
+		docs: {
+			description: "Disallow empty block statements",
+			recommended: true,
+			url: "https://eslint.org/docs/latest/rules/no-empty",
+		},
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					allowEmptyCatch: {
+						type: "boolean",
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			unexpected: "Empty {{type}} statement.",
+			suggestComment: "Add comment inside empty {{type}} statement.",
+		},
+	},
+
+	create(context) {
+		const [{ allowEmptyCatch }] = context.options;
+		const sourceCode = context.sourceCode;
+
+		return {
+			BlockStatement(node) {
+				// if the body is not empty, we can just return immediately
+				if (node.body.length !== 0) {
+					return;
+				}
+
+				// a function is generally allowed to be empty
+				if (astUtils.isFunction(node.parent)) {
+					return;
+				}
+
+				if (allowEmptyCatch && node.parent.type === "CatchClause") {
+					return;
+				}
+
+				// any other block is only allowed to be empty, if it contains a comment
+				if (sourceCode.getCommentsInside(node).length > 0) {
+					return;
+				}
+
+				context.report({
+					node,
+					messageId: "unexpected",
+					data: { type: "block" },
+					suggest: [
+						{
+							messageId: "suggestComment",
+							data: { type: "block" },
+							fix(fixer) {
+								const range = [
+									node.range[0] + 1,
+									node.range[1] - 1,
+								];
+
+								return fixer.replaceTextRange(
+									range,
+									" /* empty */ ",
+								);
+							},
+						},
+					],
+				});
+			},
+
+			SwitchStatement(node) {
+				if (
+					typeof node.cases === "undefined" ||
+					node.cases.length === 0
+				) {
+					const openingBrace = sourceCode.getTokenAfter(
+						node.discriminant,
+						astUtils.isOpeningBraceToken,
+					);
+
+					const closingBrace = sourceCode.getLastToken(node);
+
+					if (
+						sourceCode.commentsExistBetween(
+							openingBrace,
+							closingBrace,
+						)
+					) {
+						return;
+					}
+
+					context.report({
+						node,
+						loc: {
+							start: openingBrace.loc.start,
+							end: closingBrace.loc.end,
+						},
+						messageId: "unexpected",
+						data: { type: "switch" },
+						suggest: [
+							{
+								messageId: "suggestComment",
+								data: { type: "switch" },
+								fix(fixer) {
+									const range = [
+										openingBrace.range[1],
+										closingBrace.range[0],
+									];
+
+									return fixer.replaceTextRange(
+										range,
+										" /* empty */ ",
+									);
+								},
+							},
+						],
+					});
+				}
+			},
+		};
+	},
+};