Coy  Roberts

Coy Roberts

1603313880

setTimeout, setInterval and How to Schedule Tasks in JavaScript

The setTimeout() and setInterval() are two methods you can use to schedule tasks in JavaScript. This tutorial will show you how to do it. It will introduce you both methods. It will show you how these methods work. It will also show you how to use them to schedule execution of your code.

A quick introduction

Usually, you want to execute your code as you write it. That said, there will be situations when you will want to delay the execution. Or, you may want to repeat the execution in specific intervals. JavaScript provides two methods, one for each of these goals. The setTimeout() to delay execution and setInterval() to repeat it.

There is one interesting thing about these two methods to schedule tasks. None of them is a part of JavaScript language specification. These methods are actually part of HTML Living Standard specification, defined as “timers”. Fortunately, they are supported in all browsers, even in Node.js. So, we can use them safely. Let’s take a look at them.

#javascript #settimeout #setinterval

What is GEEK

Buddha Community

setTimeout, setInterval and How to Schedule Tasks in JavaScript
Coy  Roberts

Coy Roberts

1603313880

setTimeout, setInterval and How to Schedule Tasks in JavaScript

The setTimeout() and setInterval() are two methods you can use to schedule tasks in JavaScript. This tutorial will show you how to do it. It will introduce you both methods. It will show you how these methods work. It will also show you how to use them to schedule execution of your code.

A quick introduction

Usually, you want to execute your code as you write it. That said, there will be situations when you will want to delay the execution. Or, you may want to repeat the execution in specific intervals. JavaScript provides two methods, one for each of these goals. The setTimeout() to delay execution and setInterval() to repeat it.

There is one interesting thing about these two methods to schedule tasks. None of them is a part of JavaScript language specification. These methods are actually part of HTML Living Standard specification, defined as “timers”. Fortunately, they are supported in all browsers, even in Node.js. So, we can use them safely. Let’s take a look at them.

#javascript #settimeout #setinterval

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

setTimeout, setInterval and How to Schedule Tasks in JavaScript

The setTimeout() and setInterval() are two methods you can use to schedule tasks in JavaScript. This tutorial will show you how to do it. It will introduce you both methods. It will show you how these methods work. It will also show you how to use them to schedule execution of your code.

A quick introduction

Usually, you want to execute your code as you write it. That said, there will be situations when you will want to delay the execution. Or, you may want to repeat the execution in specific intervals. JavaScript provides two methods, one for each of these goals. The setTimeout() to delay execution and setInterval() to repeat it.

There is one interesting thing about these two methods to schedule tasks. None of them is a part of JavaScript language specification. These methods are actually part of HTML Living Standard specification, defined as “timers”. Fortunately, they are supported in all browsers, even in Node.js. So, we can use them safely. Let’s take a look at them.

The setTimeout method

The setTimeout() method allows you to execute your code after a delay. You set this delay, in milliseconds, as one the parameters this method accepts. When the setTimeout() method executes your code, after the delay, it executes it only once. So, no need to worry about your code being executed multiple times.

The delay parameter is optional. You can use it, but don’t have to. You will soon learn why. Another parameter this method accepts is a callback function. When the delay runs out, the setTimeout() method executes the callback function you passed as an argument, and whatever content you put inside it.

Aside these two parameters, you can also pass an infinite number of additional arguments. There are two things you have to remember if you want to pass any additional arguments. First, these will not work in versions of Internet Explorer below 9. This is probably not a problem nowadays.

The second might be more important. If you want to access these additional arguments you have to add parameters to your callback function. You can then use these parameters inside the callback function to access the data you want. One last thing. As a callback function, you can use either normal function or arrow function, both will work.

// setTimeout method syntax
setTimeout(callbackFunction, delay, argument1, argument2, ...)

// setTimeout method example no.1: with normal function
// Create a setTimeout method that waits for 2 seconds
// and then prints a message to console
setTimeout(function() {
  console.log('The time is up.')
}, 2000) // Delay is specified in milliseconds
// Output (after 2 seconds):
'The time is up.'
// setTimeout method example no.2: with arrow function
setTimeout(() => {
  console.log('The time is up.')
}, 2000) // Delay is specified in milliseconds
// Output (after 2 seconds):
'The time is up.'
// setTimeout method example no.3: additional arguments
// The "name" parameter is for accessing the 'John Doe'
// The "message" parameter is for accessing the 'Welcome back'
setTimeout((name, message) => {
  console.log(`${message} ${name}.`)
}, 2000, 'John Doe', 'Welcome back')
// Output (after 2 seconds):
'Welcome back John Doe.'

#web-development #javascript-development #development #programming #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.

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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