Add components

slider/node_modules/eslint/lib/rules/unicode-bom.js

@@ -0,0 +1,73 @@
+/**
+ * @fileoverview Require or disallow Unicode BOM
+ * @author Andrew Johnston <https://github.com/ehjay>
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		type: "layout",
+
+		defaultOptions: ["never"],
+
+		docs: {
+			description: "Require or disallow Unicode byte order mark (BOM)",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/unicode-bom",
+		},
+
+		fixable: "whitespace",
+
+		schema: [
+			{
+				enum: ["always", "never"],
+			},
+		],
+		messages: {
+			expected: "Expected Unicode BOM (Byte Order Mark).",
+			unexpected: "Unexpected Unicode BOM (Byte Order Mark).",
+		},
+	},
+
+	create(context) {
+		//--------------------------------------------------------------------------
+		// Public
+		//--------------------------------------------------------------------------
+
+		return {
+			Program: function checkUnicodeBOM(node) {
+				const sourceCode = context.sourceCode,
+					location = { column: 0, line: 1 };
+				const [requireBOM] = context.options;
+
+				if (!sourceCode.hasBOM && requireBOM === "always") {
+					context.report({
+						node,
+						loc: location,
+						messageId: "expected",
+						fix(fixer) {
+							return fixer.insertTextBeforeRange(
+								[0, 1],
+								"\uFEFF",
+							);
+						},
+					});
+				} else if (sourceCode.hasBOM && requireBOM === "never") {
+					context.report({
+						node,
+						loc: location,
+						messageId: "unexpected",
+						fix(fixer) {
+							return fixer.removeRange([-1, 0]);
+						},
+					});
+				}
+			},
+		};
+	},
+};