Console

Using the console

• Console
  • Console output
    • String output
    • Delimetered output
    • Literals
  • Clear
  • Grouped output
  • Output timer
  • Table
  • Coloured output prefixes

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Console output

String output

Outputs to the terminal

console.log('my message');
console.log('my' + ' other message');

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Delimetered output

Outputs to the terminal

const a = 'my';
const b = 'message';
console.log(a,b); // outputs with a space inbetween

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Literals

Outputs to the terminal. Uses back-ticks and ${} syntax

const b = 'message';
console.log(`my ${b}`}; // outputs 'my message'

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Clear

Clears the console

console.clear()

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Grouped output

Output messages as a group with indentation

// group content auto-indented under group heading
console.group("My Settings");
console.log(mySettings.timeOutValueMS);
console.log(mySettings.isDebug);
console.log(mySettings.uniqueId);
console.groupEnd();

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Output timer

Elapsed time operations

console.time("step-1");  // start timer
console.timeLog("step-1");  // current progress of timer
setTimeout(() => {
    console.log('Timer is complete');
    console.timeEnd("step-1"); // stops timer and outputs ellapsed time
}, 5000);

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Table

Outputs object or arrays in a table format

const mySettings = {
    timeOutValueMS: 5000,
    isDebug: true,
    uniqueId: "27832-38927-a86d9-a7f56"
}

// console.table() - prints objects and arrays in a table format
console.table(mySettings);

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Coloured output prefixes

Console Formatting - reference

import { styleText } from 'node:util';
import { errorMonitor } from 'node:events';
const danger = styleText(['yellow', 'bgRed', 'bold'], 'Error!');
const warning = styleText(['yellow', 'bgBlack', 'bold'], 'Warning');
const info = styleText(['white', 'bgBlue', 'bold'], 'Information');

console.log(danger,'oops');
console.log(warning,'uh oh');
console.log(info,'Well then..');

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