js input onkeypress code example
Example 1: html onkeypress
<input type="text" onkeypress="myFunction()">
Example 2: if keypress javascript
// Create your variable and asssign it to your ID or Class in the document using document.querySelector.
let name = document.querySelector('#exampleInputEmail1');
// Now use your variable and add an event listener to it plus your keypress, event and styling
name.addEventListener("keypress", (event) => {
name.style.border = "3px solid #28a745";
});