Engine Modules

The engine expose functional interfaces to developers via modules, which exist as ECMAScript modules.

Note: from v3.0, it is strongly recommended not to use the global variable cc to access engine modules or classes.

Function

The module 'cc' provides access to all engine functions. The contents of module 'cc' are dynamic and are related to the Feature Cropping setting in Project Setting.

Engine Log Output

Example:

import { log } from 'cc';
log('Hello world!');

Build-Time Constants

The engine module 'cc/env' exposes a number of build-time constants that represent the execution environment, debug level, or platform identifier, etc.

As these constants are declared with const, they provide good opportunities for code optimization.

Execution Environment

Debug Level

Platform Identifier

The constants in the following table indicate whether the application is running on a particular or a class of platforms, and are all of type boolean.

Output in Debug Mode

Examples are as follows:

import { log } from 'cc';
import { DEV } from 'cc/env';
if (DEV) {
    log('I am in development mode!');
}