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Following is the code to create a URL object 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; } Url object in JavaScript CLICK HERE Click on the above button to create and display a url object let resEle = document.querySelector(".result"); let url = new URL("https://google.com/image=23&size=440px"); document.querySelector(".Btn").addEventListener("click", () => { resEle.innerHTML += "url protocol = " + url.protocol + ""; resEle.innerHTML += "url host = " + url.host + ""; resEle.innerHTML += "url.pathname = " + url.pathname + ""; }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
Following is the code showing file and fileReader 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; } File and FileReader in JavaScript Click on the above button to display file and its details let resEle = document.querySelector(".result"); let sampleEle = document.querySelector(".sample"); function ... Read More
Following is the code to convert an image to blob 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; } Convert an Image to blob using JavaScript Convert Click on the above button to convert the above image to blob let BtnEle = document.querySelector(".Btn"); let resEle = gdocument.querySelector(".result"); BtnEle.addEventListener("click", () => { ... Read More
There are three ways to access JavaScript properties −Using dot property access: object.propertyUsing square brackets notation: object[‘property’]Using object destructuring: let {property} = objectFollowing is the code for accessing JavaScript object properties −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; font-weight: 500; color: blueviolet; } .sample { color: red; } Access JavaScript object properties {a:22, b:44} Access Click on the ... Read More
TextEncoder is used to convert a given string to utf-8 standard. It retunes an Uint8Array from the string.TextDecoder is used to covert a stream of bytes into a stream of code points. It can decode UTF-8 , ISO-8859-2, KOI8-R, GBK etc.Following is the code for TextDecoder and TextEncoder 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 { ... Read More
Following is the code for calculating average of an 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: blueviolet; } .sample { color: red; } Calculating average of an array Check Click on the above button to see document state let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let sampleEle = document.querySelector(".sample"); let arr = [1, 2, 3, 4, 5, 11, 22]; sampleEle.innerHTML = arr; BtnEle.addEventListener("click", () => { let sum = 0; arr.forEach((item) => (sum += item)); resEle.innerHTML = "The average of the array = " + sum / arr.length; }); OutputOn clicking the ‘Calculate’ button −
Exception can be rethrown after they have been caught by using the throw after catching the exception.Following is the code to re-throw errors 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; } Re-throw errors in JavaScript CHECK Enter a number bigger than 40 to re throw error; let BtnEle = document.querySelector(".Btn"); let resEle = ... Read More
Following is the code to destructure function parameters in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .sample, .result { font-size: 18px; font-weight: 500; color: red; } .result { color: rebeccapurple; } De structuring function parameters CLICK HERE Click on the above button to call a function and pass above object to it as argument let sampleEle = document.querySelector(".sample"); ... Read More
Following is the code to check if a document is ready in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: blueviolet; } Check if a document is ready Check Click on the above button to see document state let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); resEle.innerHTML = document.readyState + ""; BtnEle.addEventListener("click", () => { if (document.readyState === "complete") { resEle.innerHTML = "The page has finished loading completely"; } else { resEle.innerHTML = "The page is still loading"; } }); OutputOn clicking the ‘Check’ button −
The generator.throw() method is used to pass an error to the yield. The generator resumes the execution after throw has been called by throwing an error and returning object with properties done and value.Following is the code for generator.throw() 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; } generator.throw() method ... Read More