Log

Console

console.time() and console.timeEnd()

Both these methods are used in conjunction with each other to know the amount of time spent by a block or a function.

console.time("timer");
console.timeEnd("timer");

console.table({ a: 1, b: 2, c: 3 });

console.count()

This method is used to count the number that the function hit by this counting method.

for (let i = 0; i < 3; i++) {
  console.count(i);
}

console.table()

This method generates a table inside a console, for better readability. A table will be automatically generated for an array or an object.

console.group() and console.groupEnd()

These methods group() and groupEnd() allows us to group contents in a separate block, which will be indented.

console.group("group1");
console.warn("warning");
console.error("error");
console.log("I belong to a group");
console.groupEnd("group1");
console.log("I dont belong to any group");

Loglevel

Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods

import * as loglevel from "loglevel";

if (!__PROD__) {
  loglevel.setLevel("debug");
} else {
  loglevel.setLevel("error");
}

export default loglevel;