function checkForSpace(event) {
    // Get the entered value
    var enteredText = event.target.value;
    
    // Check if the entered value contains a space
    if (enteredText.includes(' ')) {
        // Display alert
        alert('Space is not allowed to entered!');

        // Empty the input field
        event.target.value = '';
    }
}

// Listen to input event for typing
document.getElementById('inputField1').addEventListener('input', function(event) {
    checkForSpace(event);
});

document.getElementById('inputField2').addEventListener('input', function(event) {
    checkForSpace(event);
});

// Listen to paste event for pasting
document.getElementById('inputField1').addEventListener('paste', function(event) {
    setTimeout(function() {
        checkForSpace(event);
    }, 0);
});

document.getElementById('inputField2').addEventListener('paste', function(event) {
    setTimeout(function() {
        checkForSpace(event);
    }, 0);
});