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Refering to a live demo codepen at https://codepen.io/Maximusssssu/pen/MWrzpav. May I ask how can I toggle between 2 css class that is red square and red triangle represented below? When user click on triangle button, it will represent a triangle when grid is clicked and when click on square button it will be a square on grid when user click on it. Thank you for reading and have a nice day :)

 <button onclick="triangle()">triangle</button> <button onclick="square()">square</button> .red-dot { position:absolute; width:15px; height:15px; background:red; pointer-events: none; } .red-triangle { position:absolute; width:15px; height:15px; background:red; pointer-events: none; clip-path: polygon(50% 0, 100% 100%, 0 100%) }
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Here you go:

let classNameValue = "red-dot" function triangle(){ classNameValue = "red-triangle" } function square(){ classNameValue = "red-dot" }

I just created a global variable and I set it to the className value you need, and then I just set the newDot.classList to the variable value.

function showCoords(event) { // Calculate the position of the nearest grid intersection: var x = (Math.floor(event.clientX/50) * 50)+2 ; var y = (Math.floor(event.clientY/50) * 50)+2 ; var coords = "X coordinates: " + x + ", Y coordinates: " + y; document.getElementById('showCoords').innerHTML = coords; // Create a new red dot: let newDot = document.createElement('span'); // Add the CSS class: newDot.className = classNameValue; // Set coordinates: newDot.style.top = y + 'px'; newDot.style.left = x + 'px'; // Add the new element to the end of the body: document.body.appendChild(newDot); }
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