Full Screen Calculator
Use the calculator below to perform calculations. History of calculations will be displayed below the calculator.
History:
let history = [];
function appendToDisplay(value) {
document.getElementById(‘display’).value += value;
}
function calculateResult() {
let result = document.getElementById(‘display’).value;
try {
result = eval(result);
document.getElementById(‘display’).value = result;
history.push(result);
updateHistory();
} catch (e) {
document.getElementById(‘display’).value = “Error”;
}
}
function clearDisplay() {
document.getElementById(‘display’).value = ”;
}
function toggleFullScreen() {
const elem = document.documentElement;
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) {
elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) {
elem.msRequestFullscreen();
}
}
function updateHistory() {
let historyHtml = history.map(item => `
${item}
`).join(”);
document.getElementById(‘history’).innerHTML = historyHtml || ‘
No history yet.
‘;
}
