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Web Development Articles
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How to delete a setter using the delete operator in JavaScript?
To delete a setter using the delete operator in JavaScript, you use the delete keyword followed by the property name. This removes both the getter and setter methods associated with that property. Syntax delete obj.propertyName Example: Deleting a Setter Here's how to delete a setter along with its corresponding getter: var department = { deptName: "Marketing", deptZone: "North", deptID: 101, get details() { return ...
Read MoreHow to delete a getter using the delete operator in JavaScript?
In this tutorial, we are going to learn how we can delete a getter function using the delete operator in JavaScript. Getter functions are used to get the property of an object and bind the property with the getter function i.e., whenever the property is called the getter function will also be called with it. You can only have one getter or setter per name on an object as we cannot create more than two getters using the same name in JavaScript. To delete a getter function in JavaScript we use the delete operator which uses the keyword "delete". ...
Read MoreHow to define getter and setter functions in JavaScript?
JavaScript getter and setter functions allow you to define how properties are accessed and modified in objects. They provide a way to execute custom logic when getting or setting property values. Getter Functions A getter function is called automatically when a property is accessed. It uses the get keyword and allows you to compute or format values dynamically. Setter Functions A setter function is called automatically when a property is assigned a value. It uses the set keyword and receives the new value as a parameter, allowing you to validate or process the data before storing ...
Read MoreWhat are the latest operators added to JavaScript?
JavaScript has introduced several powerful operators in recent versions, with the rest and spread operators being among the most significant additions in ES6 (ES2015). These operators use the same three-dot syntax (...) but serve different purposes depending on context. Rest Operator The rest operator allows you to represent an indefinite number of arguments as an array. It's indicated by three dots (...) and precedes a parameter in function definitions. Example Here's how to use the rest operator to handle multiple function arguments: ...
Read MoreUsage of rest parameter and spread operator in JavaScript?
Rest parameters and spread operators use the same three-dot syntax (...) but serve different purposes. Rest parameters collect multiple arguments into an array, while spread operators expand arrays or objects into individual elements. Rest Parameters Rest parameters allow functions to accept an indefinite number of arguments as an array. They must be the last parameter in a function's parameter list. Syntax function functionName(...parameterName) { // parameterName is an array containing all arguments } Example ...
Read MoreHow to use Spread Syntax with arguments in JavaScript functions?
We use the Spread Syntax of JavaScript to expand an array, string, or object in place. Such types of values are called iterable. This is similar to destructuring the iterable in place. Its utility in a function call allows us to extract function parameters from an iterable. In this tutorial, we learn how to use Spread Syntax with arguments in JavaScript functions. Spread operator in JavaScript A Spread operator, denoted with (...) followed by the name of the iterable expands the iterable into its constituent elements. Example of spread in destructuring: const [x, y, ...z] ...
Read MoreWhat are generator functions in JavaScript?
Generator functions in JavaScript allow you to pause and resume function execution, providing powerful control over program flow. Unlike regular functions that run to completion, generators can yield values multiple times and maintain their internal state between calls. Syntax Generator functions are defined using the function* syntax with an asterisk. The asterisk can be placed in different positions: function* myGenerator() {} // or function *myGenerator() {} // or function*myGenerator() {} How Generator Functions Work Generator functions use the yield keyword to pause execution and return a value. When called, they return a generator ...
Read MoreHow to define functions inside a function body in JavaScript?
To define functions inside a function body in JavaScript, you can use nested function declarations or function expressions. This creates closures that have access to the outer function's scope. Basic Nested Function Functions declared inside another function are only accessible within that parent function: function outerFunction() { function innerFunction() { console.log("Hello from inner function!"); } innerFunction(); // Call the nested function } outerFunction(); Hello from inner function! ...
Read MoreHow to pass the value 'undefined' to a function with multiple parameters in JavaScript?
In this tutorial, we will learn how to pass the value 'undefined' to a function with multiple parameters in JavaScript. In JavaScript, the data type of 'undefined' is primitive. When a variable is declared, JavaScript automatically assigns the value 'undefined' to it. If a function has multiple parameters and one of the parameters' values is not available at the moment, then we need to omit that parameter's value from the function call. But if we omit the parameter's value with a blank space, the JavaScript will show an error. The Problem function abc(param1, param2, param3) { ...
Read MoreHow to use a line break in array values in JavaScript?
We use the join() method of JavaScript to use a line break in array values. It allows us to concatenate all the constituent elements of an array into a single string using a common separator. The join() method in JavaScript The join() method takes as input a single separator string and returns a string with all the elements of the array separated by the specified separator string. The separator string by default is the comma(, ). The join method uses the toString() method to convert the elements of the array into corresponding strings. A null or undefined ...
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