Billy Chandler

Billy Chandler

1561004029

JavaScript console is more than console.log()

Did you know about console.warn(), console.error(), console.dir() and console.table()?

One of JavaScript’s most straightforward approach to troubleshoot anything is to log stuff utilizing console.log. But the console provides many other methods that can help you debug better.

Let’s start with it. Logging a string or a lot of JavaScript objects is the very basic use case.

Just like this,

console.log('Where am I?');

Assume we have scenario when we have a lots of objects and need to log them into console.

const foo = { id: 1, height: '200px', width: '100px' };
const bar = { id: 2, height: '250px', width: '200px' };

Only console.log(variable) one after the other is the most intuitive way to log this. When we see how it appears on the console, the problem becomes more apparent.

Variable names are not visible

As you can see, variable names are not visible. Sometimes, it gets hard or annoying when you have lots of outputs and have to expand one by one each of them to understand which object or variable is it.

One solution to avoid this is to use console.log as this:

console.log({ foo, bar });

This also reduces the number of console.log lines in our code.

console.warn() & console.error()

Depending on the situation, you can add logs using console.warn() or console.error() to make sure that your console is more readable. In some browsers, console.info() also displays an ‘i’ icon.

console.error() and console.warn()

console.group()

This can be used when grouping or nesting together relevant details to enable you to read the logs easily.

This can also be used if you have a few log statements within a function and you want the scope of each statement to be clearly visible.

For example, if you log the details of a shopping cart:

console.group('Shopping Cart');
console.log('user: John Doe');
// Group Start
console.group('Shopping item');
console.log('Name: JS Book 1');
console.log('Author: Unknown author');
console.log('ISBN: 048665088X');
console.groupEnd();
// Group strat
console.group('Shopping item');
console.log('Name: JS Book 2');
console.log('Author: Unknown author');
console.log('ISBN: 048665087X');
console.groupEnd();
console.groupEnd();

console.table()

We can take this one step further by putting all these in a table together to make it more readable. Use console.table() every time you have objects with common properties or an array of objects. Console.table({foo, bar }) can be used here and the console displays:

console.table()

console.trace()

This will show you the call path taken to reach the point at which you call <a href="https://developer.mozilla.org/en-US/docs/Web/API/Console/trace" target="_blank">console.trace</a>()

console.time()

Starts a timer you can use to track how long an operation takes. You give each timer a unique name, and may have up to 10,000 timers running on a given page. When you call <a href="https://developer.mozilla.org/en-US/docs/Web/API/Console/timeEnd" target="_blank">console.timeEnd</a>() with the same name, the browser will output the time, in milliseconds, that elapsed since the timer was started.

console.time();
for (let i = 0; i < 100000; i++) {
  // some code
}
console.timeEnd();

console.time()

console.clear()

Clears the console. The Console’s contents will be replaced with an informational message like “Console was cleared”.

console.dir()

console.dir is the way to see all the properties of a specified JavaScript object in console by which the we can easily get the properties of the object.

#javascript

What is GEEK

Buddha Community

JavaScript console is more than console.log()

Alternative libraries for Console.log() for your next JavaScript Project

If you are a JavaScript developer you must be using console.log() for debugging your JavaScript project. But do you know that there are some alternative libraries to console.log() . These libraries can be used in your next Node, React, Angular, or Vue projects. So let us see what are those libraries and how to use them.

#programming #javascript-tips #javascript #console #javascript-development

Rahul Jangid

1622207074

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

  • For single line comment in JavaScript we have to use // (double slashes)
  • For multiple line comments we have to use / * – – * /
<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

Get your business app with JavaScript

For more inquiry click here https://bit.ly/31eZyDZ

Book Free Interview: https://bit.ly/3dDShFg

#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers

Niraj Kafle

1589255577

The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips

Ajay Kapoor

1626321063

JS Development Company India | JavaScript Development Services

PixelCrayons: Our JavaScript web development service offers you a feature-packed & dynamic web application that effectively caters to your business challenges and provide you the best RoI. Our JavaScript web development company works on all major frameworks & libraries like Angular, React, Nodejs, Vue.js, to name a few.

With 15+ years of domain expertise, we have successfully delivered 13800+ projects and have successfully garnered 6800+ happy customers with 97%+ client retention rate.

Looking for professional JavaScript web app development services? We provide custom JavaScript development services applying latest version frameworks and libraries to propel businesses to the next level. Our well-defined and manageable JS development processes are balanced between cost, time and quality along with clear communication.

Our JavaScript development companies offers you strict NDA, 100% money back guarantee and agile/DevOps approach.

#javascript development company #javascript development services #javascript web development #javascript development #javascript web development services #javascript web development company