Node.js
The TypeScript runtime used in Juno does not provide full Node.js support. Polyfills are added iteratively to keep the environment stable and predictable.
If you require a specific Node.js feature or are blocked by a missing polyfill, please reach out or open an issue. Features are prioritized based on usage and compatibility.
Globals
Some global functions are supported but come with important limitations or added details.
Math.random
Generates a pseudo-random number between 0 (inclusive) and 1 (exclusive) is supported.
However, the generator is seeded once after upgrade of the Satellite. Use it with caution.
Randomness is unsuitable for use cases requiring unpredictable results, like lotteries.
const value = Math.random();
Console
Logging is fully supported. Objects are stringified and logs are routed to the IC-CDK print() function, making them visible in your Satellite logs including inside the Juno Console UI in development or production.
console.log("Hello from the Satellite");
console.info("Hello", { type: "info", msg: "Something happened" });