While working with JavaScript, I come across a requirement to count a number of properties in a JavaScript object. I found two ways to find the number of properties in an object. They are as follows: Using for loop Using Object.keys Consider an object, “cat”, as demonstrated below: https://gist.github.com/debugmodedotnet/71a86e81addac19528f75e4591767122 You can find a number of … Continue reading How to Count the Number of Properties of the JavaScript Object
JavaScript
Class in JavaScript
Read full article on the Infragistics blog ECMAScript 6 introduced the class keyword to create classes in JavaScript. Now, you can just use the class attribute to create a class in JavaScript. Before ECMA 6, whenever you called a function using a new operator, the function returned a new object. Therefore, the function was acting as a … Continue reading Class in JavaScript
Simplifying function expressions and the function statement in JavaScript
Read full article on the Infragistics blog In JavaScript, a function can be created in three possible ways: Function as an expression Function as a statement Arrow functions In this post, we will learn about function expressions and the function statement. Consider the following code: https://gist.github.com/debugmodedotnet/e4b1dc967bc51b6c8dd1ff98d8d88dc6 When you create a function as shown above, it … Continue reading Simplifying function expressions and the function statement in JavaScript
What are the Call and Apply Methods in JavaScript
Read full article on the Infragistics blog In JavaScript, the apply() and call() methods execute a function in the context (scope) of the first argument you pass to them. Let’s take a look at them in action to learn more. Say that you have an object person as shown below: https://gist.github.com/debugmodedotnet/11ca4e8d58e602ca93813cef93d9601e And in addition, you have a … Continue reading What are the Call and Apply Methods in JavaScript
Four Ways to Create Objects in JavaScript
In JavaScript, there are four methods to use to create an object: Object literals New operator or constructor Object.create method Class In this post, we will learn each of these methods. Object literals An object literal, also called an object initializer, is a comma-separated set of paired names and values. You can create an object … Continue reading Four Ways to Create Objects in JavaScript
What are Template Literals in JavaScript
Read full article on the Infragistics blog In ES6, two types of literals were introduced: Template Literals for string concatenation and expression embedding in a string Tagged Template Literals to tag the Template Literal in a function so the literal can be evaluated in the function Let’s assume that you need to do the string … Continue reading What are Template Literals in JavaScript
Simplifying function expressions and the function statement
Read full article on the Infragistics blog In JavaScript, a function can be created in three possible ways: Function as an expression Function as a statement Arrow functions In this post, we will learn about function expressions and the function statement. Consider the following code: https://gist.github.com/debugmodedotnet/f7f9c0a6e18a62521ad5fd6656adb69e When you create a function as shown above, it … Continue reading Simplifying function expressions and the function statement
What are getters and setters in JavaScript
In JavaScript, you may have heard of getters and setters. Let’s take a look at what these things are.First, a setter is used to set the value of a property. A setter gets called each time the value of the property is changed. In other words, it executes a function for each time a property … Continue reading What are getters and setters in JavaScript
JavaScript Object Property Descriptors
In JavaScript, you can create an object literal as shown in the listing below:At first sight, it looks like the object cat has two properties with a string and number value. However, it’s much more than that to a JavaScript interpreter. In ES5, the concept of a Property Descriptor was introduced. Before we go ahead … Continue reading JavaScript Object Property Descriptors
Arrow functions in JavaScript
The JavaScript arrow function is a shorter way of writing a function expression that was introduced in ECMAScript 6. Usually in JavaScript, you can create a function in two ways:Function as statement Function as expressionA function statement can be created as shown below:The same function can be created as a function expression as shown below:ECMA … Continue reading Arrow functions in JavaScript
