shell-sleeper

An alternative to setTimeout and setInterval powered by the shell sleep command.

Requirements

• Node.js 14 or newer
• A system-level sleep utility (comes with most Linux distros) to get the most from the library

Installation

Exhaustion can be installed using npm:

npm install --save shell-sleeper

Usage

Usage is very straightforward, shell-sleeper can serve as a drop-in replacement for setInterval and setTimeout:

import {
    isSleepAvailable,
    setShellInterval,
    setShellTimeout,
    clearShellTimeout,
    clearShellInterval,
    shellSleep,
} from 'shell-sleeper';

// Check if a system-level shell `sleep` utility is available.
if (isSleepAvailable()) {
    console.log('System-level sleep is available!');
} else {
    console.log('System-level sleep is not available!');
}

// setShellInterval and setShellTimeout function identically to setInterval and setTimeout.
const interval = setShellInterval(() => console.log("Will execute every 5 seconds."), 5000);
const timeout = setShellTimeout(() => console.log("Will execute after 5 seconds."), 5000);

// You can clear them in just the same way too.
clearShellInterval(interval);
clearShellTimeout(timeout);

// An extra `shellSleep` command is also included.
(async () => {
    await shellSleep(10000); // Will block for 10 seconds.
})();

If a system-level shell-based sleep utility it not available, the library will fall back to use setInterval and setTimeout.

Related Projects

This library uses the command-exists package to check for the existence of an available sleep command-line utility.

License

MIT © lambdacasserole.