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📄 no-dynamic-delete

📊 Analysis Summary

Metric	Count
🔧 Functions	2
📦 Imports	3

📚 Table of Contents

• Default Export
• Imports
• Functions

🛠️ File Location:

📂 packages/eslint-plugin/src/rules/no-dynamic-delete.ts

📤 Default Export

export default createRule({ ... })

Property	Value
name	'no-dynamic-delete'
meta.type	'suggestion'
meta.docs.description	'Disallow using the delete operator on computed key expressions'
meta.docs.recommended	'strict'
meta.messages.dynamicDelete	'Do not delete dynamically computed property keys.'
meta.schema	[]
defaultOptions	[]

Entry point: create — documented under Functions.

---

📦 Imports

Name	Source
TSESTree	@typescript-eslint/utils
AST_NODE_TYPES	@typescript-eslint/utils
createRule	../util

---

Functions

create(context: any): { 'UnaryExpression[operator=delete]'(node: TSESTree.UnaryEx…

Parameters:

• context any

Returns: { 'UnaryExpression[operator=delete]'(node: TSESTree.UnaryExpression): void; }

Calls:

• isAcceptableIndexExpression
• context.report

Code

create(context) {
    return {
      'UnaryExpression[operator=delete]'(node: TSESTree.UnaryExpression): void {
        if (
          node.argument.type !== AST_NODE_TYPES.MemberExpression ||
          !node.argument.computed ||
          isAcceptableIndexExpression(node.argument.property)
        ) {
          return;
        }

        context.report({
          node: node.argument.property,
          messageId: 'dynamicDelete',
        });
      },
    };
  }

isAcceptableIndexExpression(property: TSESTree.Expression): boolean

Parameters:

• property TSESTree.Expression

Returns: boolean

Calls:

• ['number', 'string'].includes

Code

function isAcceptableIndexExpression(property: TSESTree.Expression): boolean {
  return (
    (property.type === AST_NODE_TYPES.Literal &&
      ['number', 'string'].includes(typeof property.value)) ||
    (property.type === AST_NODE_TYPES.UnaryExpression &&
      property.operator === '-' &&
      property.argument.type === AST_NODE_TYPES.Literal &&
      typeof property.argument.value === 'number')
  );
}

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