globalObjectCalls

Reports calling global objects like Math, JSON, or Reflect as functions.

✅ This rule is included in the ts untyped preset.

The global objects Math, JSON, Reflect, and Atomics are not constructors or functions. They are built-in objects that provide utility methods and properties as namespaces. Attempting to call them as functions or instantiate them with new will result in a TypeError at runtime.

Examples

❌ Incorrect

const result = Math();

const data = JSON();

const reflected = Reflect();

const instance = new Atomics();

✅ Correct

const value = Math.abs(-5);

const parsed = JSON.parse("{}");

const keys = Reflect.ownKeys({});

const result = Atomics.add(buffer, 0, 1);

Options

This rule is not configurable.

When Not To Use It

If your codebase redefines these objects, you likely will not want to enable this rule. Otherwise this rule should generally always be enabled, as calling these global objects as functions will always result in a runtime error.

Further Reading

• MDN: Atomics
• MDN: JSON
• MDN: Math
• MDN: Reflect

Equivalents in Other Linters

• Biome: noGlobalObjectCalls
• Deno: no-obj-calls
• ESLint: no-obj-calls
• Oxlint: eslint/no-obj-calls