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node_modules/eslint-plugin-react/lib/rules/jsx-first-prop-new-line.js

@@ -0,0 +1,83 @@
+/**
+ * @fileoverview Ensure proper position of the first property in JSX
+ * @author Joachim Seminck
+ */
+
+'use strict';
+
+const docsUrl = require('../util/docsUrl');
+const report = require('../util/report');
+const propsUtil = require('../util/props');
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+const messages = {
+  propOnNewLine: 'Property should be placed on a new line',
+  propOnSameLine: 'Property should be placed on the same line as the component declaration',
+};
+
+/** @type {import('eslint').Rule.RuleModule} */
+module.exports = {
+  meta: {
+    docs: {
+      description: 'Enforce proper position of the first property in JSX',
+      category: 'Stylistic Issues',
+      recommended: false,
+      url: docsUrl('jsx-first-prop-new-line'),
+    },
+    fixable: 'code',
+
+    messages,
+
+    schema: [{
+      enum: ['always', 'never', 'multiline', 'multiline-multiprop', 'multiprop'],
+    }],
+  },
+
+  create(context) {
+    const configuration = context.options[0] || 'multiline-multiprop';
+
+    function isMultilineJSX(jsxNode) {
+      return jsxNode.loc.start.line < jsxNode.loc.end.line;
+    }
+
+    return {
+      JSXOpeningElement(node) {
+        if (
+          (configuration === 'multiline' && isMultilineJSX(node))
+          || (configuration === 'multiline-multiprop' && isMultilineJSX(node) && node.attributes.length > 1)
+          || (configuration === 'multiprop' && node.attributes.length > 1)
+          || (configuration === 'always')
+        ) {
+          node.attributes.some((decl) => {
+            if (decl.loc.start.line === node.loc.start.line) {
+              report(context, messages.propOnNewLine, 'propOnNewLine', {
+                node: decl,
+                fix(fixer) {
+                  const nodeTypeArguments = propsUtil.getTypeArguments(node);
+                  return fixer.replaceTextRange([(nodeTypeArguments || node.name).range[1], decl.range[0]], '\n');
+                },
+              });
+            }
+            return true;
+          });
+        } else if (
+          (configuration === 'never' && node.attributes.length > 0)
+          || (configuration === 'multiprop' && isMultilineJSX(node) && node.attributes.length <= 1)
+        ) {
+          const firstNode = node.attributes[0];
+          if (node.loc.start.line < firstNode.loc.start.line) {
+            report(context, messages.propOnSameLine, 'propOnSameLine', {
+              node: firstNode,
+              fix(fixer) {
+                return fixer.replaceTextRange([node.name.range[1], firstNode.range[0]], ' ');
+              },
+            });
+          }
+        }
+      },
+    };
+  },
+};