The JavaScript Array.prototype.flat() method is used to flatten an array recursively up to a specified depth. It doesn’t manipulate the original array but creates a new flattened array.Following is the code for the Array.prototype.flat() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result,.sample {       font-size: 20px;       font-weight: 500;    } Array.prototype.flat() method {       let store = arr.flat(1);       store.forEach((item,index) => {          resEle.innerHTML += index + ' : ' + item + '';       });    }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −

The JavaScript Array.prototype.flatMap() function flattens the given nested array into a new flat array.Following is the code for the Array.prototype, flatMap() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {       font-size: 20px;       font-weight: 500;    } JavaScript Array flatMap() CLICK HERE Click on the above button to convert the nested array to flat array    let fillEle = document.querySelector(".sample");    let arr = ["cow", ["bull", "lion", "tiger"], "sheep"];    for (x ... Read More

The optional catch binding introduced in ES2019 allows us to remove the surrounding parentheses of a catch binding i.e. we don’t need to use a variable to store the error object. It is useful especially if we know about the error in advance or even if want to react to an error without knowing about it.Following is the code for the optional catch binding in JavaScript −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result {       font-size: 20px;       ... Read More

The String.trimStart() method is used to remove whitespace from the string beginning while the String.trimEnd() method removes whitespace from the end of the string.Following is the code for the String.trimStart() and String.trimEnd() methods −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result,.sample {       font-size: 20px;       font-weight: 500;    } String.trimStart() and String.trimEnd() methods {       resEle.innerHTML = "trimStart() :" + str.trimStart() + "|";       resEle.innerHTML += "trimEnd() :" + str.trimEnd() + "|";    }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −

The Object.fromEntries() method in JavaScript is used for converting an iterable like an array, map having a key value pair into an object.Following is the code for the Object.fromEntries() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result, .sample {       font-size: 20px;       font-weight: 500;    } Object.fromEntries() method [[firstName, Rohan], [lastName, Sharma], [age, 22]] Object = CLICK HERE Click on the above button to convert the above array into object   ... Read More

The JavaScript array.flatMap() function flattens the given nested array into a new flat array.Following is the code for the array.flatMap() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {       font-size: 20px;       font-weight: 500;    } JavaScript Array flatMap() CLICK HERE Click on the above button to convert the nested array to flat array    let fillEle = document.querySelector(".sample");    let arr = ["cow", ["bull", "lion", "tiger"], "sheep"];    for ... Read More

The JavaScript Array.flat() method is used to flatten an array recursively up to a specified depth. It doesn’t manipulate the original array but creates a new flattened array.Following is the code for the Array.flat() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result, .sample {       font-size: 20px;       font-weight: 500;    } Array.flat() method [1, 2, 3, [4, 5], [6, [7, 8]]] After flat : CLICK HERE Click on the above button to ... Read More

The JavaScript Array.protoype.includes() method is used to check if an array contains a given element or not.Following is the code for the Array.protoype.includes() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {       font-size: 20px;       font-weight: 500;    } JavaScript Array includes() CLICK HERE Click on the above button to check if the array contains lion element or not    let fillEle = document.querySelector(".sample");    let arr = ["cow", "bull", "lion", "tiger", ... Read More

Const and let were introduced in ES2015 to declare block scoped variables. While variables declared using let can be reassigned, they cannot be reassigned if they were declared using const.Following is the code showing let and const in JavaScript −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .result, .sample {       font-size: 20px;       font-weight: 500;    } Const and let in JavaScript CLICK HERE Click on the above button to reassign const and let ... Read More

Adding and accessing object methods are common tasks in JavaScript. JavaScript objects are collections of properties and methods, and the JavaScript methods are functions associated with objects. JavaScript provides various features and ways to add and access object methods. In this article, we will understand how to add or access object methods in JavaScript. Understanding JavaScript Object Methods JavaScript methods are functions associated with objects. They allow objects to perform actions, which is important for creating dynamic and interactive programs. Methods in objects are functions that work with the object's properties. This helps make programming more organized and efficient. ... Read More