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An object initializer is an expression that allow us to initialize a newly created object. It is a comma-separated list of zero or more pairs of property names and associated values of an object enclosed in a pair of curly braces {}.Following is the code for object initializer in JavaScript.Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } Object initializer in JavaScript ... Read More
Following is the code for accessing an array returned by a function in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } Accessing an array returned by a function in JavaScript CLICK HERE Click on the above button to return an array from retTable() function and access it let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); function retTable(num) { let tempNum = []; for (i = 1; i { let tableArr = retTable(5); resEle.innerHTML = "tableArr = " + tableArr; }); OutputOn clicking the ‘CLICK HERE’ button −
The loose equality operator ‘==’ allows us to compare two or more operands by converting their value to a common type first and then checking for the equality between them.strict equality operator ‘===’ allows us to compare two or more operands by checking the equality between the values as well as their types . It returns true only if the values and the type both match with the other operand.Following is the code for loose equality vs strict equality in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, ... Read More
The loose equality operator ‘==’ allows us to compare two or more operands by converting their value to a common type first and then checking for the equality between them.Following is the code to implement loose equality in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } Loose equality in JavaScript. CLICK HERE Click on the above button see some ... Read More
The accessor property helps us in implementing getter and setter functions in JavaScript.They execute a function on getting or setting a value.There are four attributes of an accessor property −get − It gets called when a property is read. It doesn’t’ take any arguments/set − It gets called when a property is set. It takes only one argument.enumerable − Allows the object to be iterable when set to true.configurable − When set to false it will not allow to delete the property or change its values.Following is the code for accessor property and its attributes −Example Live Demo ... Read More
Following is the code for renaming imports and exports in JavaScript −Note − You need to run a localhost server to run this example.Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } Renaming imports and exports in JavaScript CLICK HERE Click on the above button to execute the imported function script.jsimport {test, tellTime as showTime} from "./sample.js"; let resultEle = ... Read More
Following is the code for loading JavaScript modules dynamically −Note − You need to run a localhost server to run this example.Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; } Loading JavaScript modules dynamically IMPORT Click on the above button to import module script.jsimport test from './sample.js'; document.querySelector('.Btn').addEventListener('click',()=>{ test(); })sample.jslet resultEle = document.querySelector(".result"); export default function testImport(){ resultEle.innerHTML = 'Module testImport has been imported'; }OutputOn clicking the ‘IMPORT’ button −
Keyed collections are data collections that are ordered by key not index. They are associative in nature. Map and set objects are keyed collections and are iterable in the order of insertion.Following is the code for keyed collections in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } Keyed collections in JavaScript CLICK HERE Click on the above button to ... Read More
Arrays are the indexed collection in JavaScript as they allow us to access an element using its index.Following is the code to implement indexed collections in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } Indexed collections in JavaScript CLICK HERE Click on the above button to create and display the array let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); BtnEle.addEventListener("click", () => { let arr = [1, 2, 3, 4, 5]; arr.forEach((item, index) => { resEle.innerHTML += `arr[${index}] = ${item} `; }); }); OutputOn clicking the ‘CLICK HERE’ button −
There are three types of conditional statements in JavaScript −If statement − The if statement is used to execute code inside the if block only if the specific condition is met.If else statement − The If….Else statement is used to check only two conditions and execute different codes for each of them.If else if else statement − The if…else if…else statement is used for checking more than two conditions.Following is the code to implement conditional statements in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; ... Read More