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Following is the code for passing arguments to anonymous functions in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-weight: 500; font-size: 20px; color: blueviolet; } Pass arguments to anonymous functions CLICK HERE Click on the above button to call an anonymous function and pass parameters to it let BtnEle = document.querySelector(".Btn"); let resEle = document.querySelector(".result"); let add = function (a, b) { return a + b; }; BtnEle.addEventListener("click", (event) => { resEle.innerHTML = "The sum of 22 and 19 = " + add(22, 19); }); OutputOn clicking the ‘CLICK HERE’ button −
Following is the code for getting the child element of a parent using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .child1, .child2, .child3 { display: none; margin: 10px; width: 70px; height: 70px; } .child1 { background-color: red; } .child2 { background-color: pink; } .child3 { background-color: blue; } Get ... Read More
The WITH statement is used to specify the default object for the given property and allow us to prevent writing long lengthy object references. It adds the given object to the head of the scope chain.Following is the code for with statement in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; } JavaScript with statement CLICK HERE Click on the above button to get the first ... Read More
Following is the code for accessing a parent element using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: #8a2be2; } .parent1, .parent2, .parent3 { display: inline-block; margin: 10px; } .child1, .child2, .child3 { width: 70px; height: 70px; } .child1 { background-color: red; ... Read More
Following is the code for checking whether a button is clicked using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; color: blueviolet; } Checking whether a Button is clicked using JavaScript CLICK HERE Click on the above button to check if the button is clicked let BtnEle = document.querySelector(".Btn"); let resEle = document.querySelector(".result"); let clickCount = 0; BtnEle.addEventListener("click", () => { clickCount++; resEle.innerHTML = "The button has been clicked " + clickCount + " times "; }); OutputOn clicking the button 5 times −
Following is the code to display an alert for form’s unsaved changes in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } input { margin: 10px; } Alert for unsaved changes in form Username Password SUBMIT function pageUnload() { return "The data on this page will be lost if you leave"; } OutputIf we click on the reload button then the following warning will be shown −
Following is the code to find the coordinates of every link in a page using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; } Coordinates of every link in a page google.com facebook.com yahoo.com CLICK HERE Click on the above button to display the link coordinates let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let links = document.getElementsByTagName("a"); BtnEle.addEventListener("click", () ... Read More
Following is the code to circle coordinates to array in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-weight: 500; font-size: 18px; color: blueviolet; } Circle coordinates to array CLICK HERE Click on the above button to generate the circle coordinates let resEle = document.querySelector(".result"); let BtnEle = document.querySelector(".Btn"); let xCoords = []; let yCoords = []; function circleCoordinates(radius, steps, ... Read More
Following is the code to retrieve the text contents of the user selection using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 20px; font-weight: 500; color: rebeccapurple; } Retrieve the text contents of the user selection Here is some text inside the div SELECT Click on the above button to display the text selected by the user let resEle = document.querySelector(".result"); ... Read More
Following is the code to select and deselect text inside an element using JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; } Select and Deselect Text Inside an Element Here is some text inside the div SELECT DESELECT Click on the above button to select/de-select text inside the div let resEle = document.querySelector(".result"); let BtnEle = document.querySelectorAll(".Btn"); BtnEle[0].addEventListener("click", () => { window.getSelection().selectAllChildren(resEle); }); BtnEle[1].addEventListener("click", () => { window.getSelection().removeAllRanges(); }); OutputThe above code will produce the following output −On clicking the ‘SELECT’ button −On clicking the ‘DESELECT’ button −