How to select with dom a random child element from an element in Javascript?

i started an interactive rating card. The goal is to choose a number how you would rate and then to submit your answer. i want to chose a number and then with and eventlistner to change the background of the div element of the choosen number from the current background to another color. So far… Read More How to select with dom a random child element from an element in Javascript?

remove Atrribute "hidden" from a table using DOM shows removeAttribute is not a function

i’m having problems using the dom "removeattribute" when i click on a button i need that the table shows up in the HTML i’m using the next HTML: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <div class="form-group"> <label for="">Título</label> <input type="text" class="form-control" name="" id="titleInput" aria-describedby="helpId" placeholder="Título del juego">… Read More remove Atrribute "hidden" from a table using DOM shows removeAttribute is not a function

Why the TS type of HTMLInputElement.files property may be null?

There is input with type=’file’ attribute like this: function TestComp() { const onChange = (e: React.ChangeEvent<HTMLInputElement>) => { const [file] = e.target.files; //… }; return <input type=’file’ onChange={onChange}/> } Got error: type ‘FileList | null’ must have a ‘Symbol.iterator’ method that returns an iterator.ts(2488) The e.target.files TS type is: interface HTMLInputElement extends HTMLElement { /**… Read More Why the TS type of HTMLInputElement.files property may be null?

How do I with the use of JavaScript and CSS transform property make an object move 20px and roll 180deg with each press of any keyboard button?

Hello I have to make and object (in my case a circle) move 20px and roll 180 deg each time any key on my keyboard is pressed. Can anybody help med with this? >Solution : // declare initial values let pos = 0 let rot = 0 // grab the element const circle = document.querySelector(‘.circle’)… Read More How do I with the use of JavaScript and CSS transform property make an object move 20px and roll 180deg with each press of any keyboard button?

Loop through an array of objects and display the objects within a html/css defined table

i have an array of objects that should correspond with a table created using html tables and css. i need the information inside the array of objects to appear in the table whenever i add a new object to the array. as i understand it, it will require a loop that will iterate through the… Read More Loop through an array of objects and display the objects within a html/css defined table

How to wrap the specific text with span tag inside the <p> tag

var dtag = document.querySelector(‘p’) let len = dtag.innerHTML.split(‘ ‘).length for(let i = 0; i < len; i++){ if(dtag.innerHTML.split(‘ ‘)[i] === ‘Format’){ let span = document.createElement(‘span’) span.append(dtag.innerHTML.split(‘ ‘)[i]) dtag.append(span) } } <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta http-equiv=”X-UA-Compatible” content=”IE=edge”> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <title>Document</title> <script src=”commanwords1.js” defer></script> </head> <body> <p>Printable Format hello shivam</p> </body>… Read More How to wrap the specific text with span tag inside the <p> tag

How to prevent looking for DOM elements after window.location.href (redirection)

In the index.html page I have the following code <body> <h1>First page</h1> <button id="submitBtn">Submit</button> <script src="script.js"></script> </body> The JS is a simple script that redirects the page to another page – second.html document.getElementById(‘submitBtn’).addEventListener(‘click’, function(e) { e.preventDefault(); window.location.href = ‘another_file.html’; }) Once the second page is loaded, the console gives – TypeError: Cannot read properties of… Read More How to prevent looking for DOM elements after window.location.href (redirection)

False "the node before which the new node is to be inserted is not a child of this node."

None of the other related questions had a working answer, thus I decided to ask here myself. While writing JavaScript I keep getting the following error no matter what I try: Failed to execute ‘insertBefore’ on ‘Node’: The node before which the new node is to be inserted is not a child of this node.… Read More False "the node before which the new node is to be inserted is not a child of this node."