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app_vue/node_modules/eslint-plugin-vue/lib/rules/no-multiple-objects-in-class.js

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+/**
+ * @author tyankatsu <https://github.com/tyankatsu0105>
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+const { defineTemplateBodyVisitor } = require('../utils')
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+/**
+ * count ObjectExpression element
+ * @param {VDirective & {value: VExpressionContainer & {expression: ArrayExpression}}} node
+ * @return {number}
+ */
+function countObjectExpression(node) {
+  return node.value.expression.elements.filter(
+    (element) => element && element.type === 'ObjectExpression'
+  ).length
+}
+
+module.exports = {
+  meta: {
+    type: 'suggestion',
+    docs: {
+      description: 'disallow to pass multiple objects into array to class',
+      categories: undefined,
+      url: 'https://eslint.vuejs.org/rules/no-multiple-objects-in-class.html'
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      unexpected: 'Unexpected multiple objects. Merge objects.'
+    }
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    return defineTemplateBodyVisitor(context, {
+      /** @param {VDirective & {value: VExpressionContainer & {expression: ArrayExpression}}} node */
+      'VAttribute[directive=true][key.argument.name="class"][key.name.name="bind"][value.expression.type="ArrayExpression"]'(
+        node
+      ) {
+        if (countObjectExpression(node) > 1) {
+          context.report({
+            node,
+            loc: node.loc,
+            messageId: 'unexpected'
+          })
+        }
+      }
+    })
+  }
+}