Add components

slider/node_modules/eslint/lib/rules/arrow-spacing.js

@@ -0,0 +1,188 @@
+/**
+ * @fileoverview Rule to define spacing before/after arrow function's arrow.
+ * @author Jxck
+ * @deprecated in ESLint v8.53.0
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		deprecated: {
+			message: "Formatting rules are being moved out of ESLint core.",
+			url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
+			deprecatedSince: "8.53.0",
+			availableUntil: "10.0.0",
+			replacedBy: [
+				{
+					message:
+						"ESLint Stylistic now maintains deprecated stylistic core rules.",
+					url: "https://eslint.style/guide/migration",
+					plugin: {
+						name: "@stylistic/eslint-plugin",
+						url: "https://eslint.style",
+					},
+					rule: {
+						name: "arrow-spacing",
+						url: "https://eslint.style/rules/arrow-spacing",
+					},
+				},
+			],
+		},
+		type: "layout",
+
+		docs: {
+			description:
+				"Enforce consistent spacing before and after the arrow in arrow functions",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/arrow-spacing",
+		},
+
+		fixable: "whitespace",
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					before: {
+						type: "boolean",
+						default: true,
+					},
+					after: {
+						type: "boolean",
+						default: true,
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			expectedBefore: "Missing space before =>.",
+			unexpectedBefore: "Unexpected space before =>.",
+
+			expectedAfter: "Missing space after =>.",
+			unexpectedAfter: "Unexpected space after =>.",
+		},
+	},
+
+	create(context) {
+		// merge rules with default
+		const rule = Object.assign({}, context.options[0]);
+
+		rule.before = rule.before !== false;
+		rule.after = rule.after !== false;
+
+		const sourceCode = context.sourceCode;
+
+		/**
+		 * Get tokens of arrow(`=>`) and before/after arrow.
+		 * @param {ASTNode} node The arrow function node.
+		 * @returns {Object} Tokens of arrow and before/after arrow.
+		 */
+		function getTokens(node) {
+			const arrow = sourceCode.getTokenBefore(
+				node.body,
+				astUtils.isArrowToken,
+			);
+
+			return {
+				before: sourceCode.getTokenBefore(arrow),
+				arrow,
+				after: sourceCode.getTokenAfter(arrow),
+			};
+		}
+
+		/**
+		 * Count spaces before/after arrow(`=>`) token.
+		 * @param {Object} tokens Tokens before/after arrow.
+		 * @returns {Object} count of space before/after arrow.
+		 */
+		function countSpaces(tokens) {
+			const before = tokens.arrow.range[0] - tokens.before.range[1];
+			const after = tokens.after.range[0] - tokens.arrow.range[1];
+
+			return { before, after };
+		}
+
+		/**
+		 * Determines whether space(s) before after arrow(`=>`) is satisfy rule.
+		 * if before/after value is `true`, there should be space(s).
+		 * if before/after value is `false`, there should be no space.
+		 * @param {ASTNode} node The arrow function node.
+		 * @returns {void}
+		 */
+		function spaces(node) {
+			const tokens = getTokens(node);
+			const countSpace = countSpaces(tokens);
+
+			if (rule.before) {
+				// should be space(s) before arrow
+				if (countSpace.before === 0) {
+					context.report({
+						node: tokens.before,
+						messageId: "expectedBefore",
+						fix(fixer) {
+							return fixer.insertTextBefore(tokens.arrow, " ");
+						},
+					});
+				}
+			} else {
+				// should be no space before arrow
+				if (countSpace.before > 0) {
+					context.report({
+						node: tokens.before,
+						messageId: "unexpectedBefore",
+						fix(fixer) {
+							return fixer.removeRange([
+								tokens.before.range[1],
+								tokens.arrow.range[0],
+							]);
+						},
+					});
+				}
+			}
+
+			if (rule.after) {
+				// should be space(s) after arrow
+				if (countSpace.after === 0) {
+					context.report({
+						node: tokens.after,
+						messageId: "expectedAfter",
+						fix(fixer) {
+							return fixer.insertTextAfter(tokens.arrow, " ");
+						},
+					});
+				}
+			} else {
+				// should be no space after arrow
+				if (countSpace.after > 0) {
+					context.report({
+						node: tokens.after,
+						messageId: "unexpectedAfter",
+						fix(fixer) {
+							return fixer.removeRange([
+								tokens.arrow.range[1],
+								tokens.after.range[0],
+							]);
+						},
+					});
+				}
+			}
+		}
+
+		return {
+			ArrowFunctionExpression: spaces,
+		};
+	},
+};