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The JavaScript alert() function is used to display a popup message to the user.Following is the code for the JavaScript alert() function −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } Javascript text alert CLICK HERE Click on the above button to trigger the alert popup let BtnEle = document.querySelector(".Btn"); BtnEle.addEventListener("click", () => { alert("You pressed the button"); }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
The image object represents the HTML element.Following is the code for image object in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } The image() object in JavaScript CLICK HERE Click on the above button to display an image let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let newImage = new Image(500, 300); newImage.src = "https://i.picsum.photos/id/195/536/354.jpg"; BtnEle.addEventListener("click", () => { resEle.appendChild(newImage); }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
Following is the code to apply reduce method to objects in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; font-weight: 500; color: rebeccapurple; } .result { color: red; } Reduce method for objects in JavaScript { a:6, b:2, c:9, d:5, } CLICK HERE Click on the above button to multiply the above object values together let resEle ... Read More
Following is the code to convert two arrays into one JavaScript object −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; font-weight: 500; color: rebeccapurple; } .result { color: red; } Convert two arrays into one JavaScript object ["firstName", "lastName", "age"]["Rohan", "Sharma", 21] CLICK HERE Click on the above button to create an object from the above two arrays ... Read More
Following is the code to assign values to an array with null/empty objects using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } Assign values to an array with null/empty objects CLICK HERE Click on the above button to assign values to empty object inside arrObj let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let obj = ... Read More
Following is the code to create a multidimensional JavaScript object −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } Create a multidimensional JavaScript object CLICK HERE Click on the above button to create and display a multidimensional object let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); BtnEle.addEventListener("click", () => { let obj = { firstName: "Rohan", lastName: "Sharma", school: { name: "St Marks", address: { city: "Dwarka", state: "Delhi", }, }, }; console.log(obj); }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button and inspecting the output in console −
Following is the code to access an object through another object in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } Access an object through another object in JavaScript CLICK HERE Click on the above button to display obj2 let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let obj = { firstName: "Rohan", ... Read More
Following is the code to create a unique ID for each object −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: rebeccapurple; } Create a unique ID for each object CLICK HERE { if (obj.id === obj1.id) { resEle.innerHTML = "The id generated are not unique "; } else { resEle.innerHTML = "The id generated is unique for each object"; } }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
Following is the code to draw a circle in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .circleCanvas { border: 3px solid #110101; } Draw a circle in JavaScript CLICK HERE Click on the above button to create a circle in the above canvas element let canvasEle = document.querySelector(".circleCanvas"); let BtnEle = document.querySelector(".Btn"); BtnEle.addEventListener("click", () => { var circle = canvasEle.getContext("2d"); circle.beginPath(); circle.arc(180, 100, 90, 0, 2 * Math.PI); circle.stroke(); }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
Following is the code for single and multidimentsional array in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; font-weight: 500; color: rebeccapurple; } .result { color: red; } Single dimensional array vs multidimensional array Single dimensional Array Multidimensional Array CLICK HERE Click on the above button to display single and multidimensional array let resEle = document.querySelector(".result"); let ... Read More