@sliit-foss/functions

Just a small set of utility functions

Installation

# using npm
npm install @sliit-foss/functions

# using yarn
yarn add @sliit-foss/functions

Usage

# using require
const { trace, traced, cleanTraced, cleanTrace, bindKey, asyncHandler, tracedAsyncHandler } = require("@sliit-foss/functions");

# using import
import { trace, traced, cleanTraced, cleanTrace, bindKey, asyncHandler, tracedAsyncHandler } from "@sliit-foss/functions";

Examples

• trace

trace(function foo() {
  console.log(123);
});

/*
  foo execution initiated
  123
  foo execution completed - execution_time : 0.2069999985396862
*/

• traced (Same as trace but returns a decorated function)

const tracedFoo = traced(function foo() {
  console.log(123);
})();

tracedFoo();

/*
  foo execution initiated
  123
  foo execution completed - execution_time : 0.2069999985396862
*/

• cleanTraced and cleanTrace (Same as the above two but ignores tracing for anonymous functions to avoid polluting the logs)

• tracing a function with a layer prefix (Works for all 4 functions above)

const tracedFoo = traced["controller"](function foo() {
  console.log(123);
})();

tracedFoo();

/*
  controller >>> foo execution initiated
  123
  controller >>> foo execution completed - execution_time : 0.2069999985396862
*/

• bindKey (Creates a bounded function from a passed object and function key with its context preserved)

const obj = {
  name: "test-object",
  foo() {
    console.log(`Inside ${this.name} function foo`);
  }
};
const preserved = bindKey(obj, "foo");
setTimeout(preserved, 0); // Outputs `Inside test-object function foo`
console.log(preserved.name); // Outputs `bound foo`

• tracedAsyncHandler

tracedAsyncHandler(async function hello(req, res) => {
  res.send("Hello World");
});
/*
  hello execution initiated
  hello execution completed - execution_time : 0.2069999985396862
*/

• asyncHandler (Same as tracedAsyncHandler but without the tracing. Useful when you don't want to trace the execution time of the function)

asyncHandler(async function hello(req, res) => {
  res.send("Hello World");
});

Disabling tracing

• Set the environment variable DISABLE_FUNCTION_TRACING to true or 1 to disable tracing.