JavaScript - detect Ctrl key pressed

In this short article, we would like to show how to detect if Ctrl key was pressed using JavaScript.

Quick solution:

// ONLINE-RUNNER:browser;

<script>

    var handleMouseClick = function(e) {
        if (e.ctrlKey) {
            console.log('Ctrl key was pressed with mouse click.');
        }
    };

</script>
<input placeholder="Press Ctrl key and click with mouse." onclick="handleMouseClick(event)" />

Alternative solutions

Only Ctrl key pressed detection:

// ONLINE-RUNNER:browser;

<script>

    var handleKeyUp = function(e) {
        if (e.key === 'Control') {
            console.log('Ctrl key was pressed.');
        }
    };

</script>
<input placeholder="Click me and press Ctrl key ..." onkeyup="handleKeyUp(event)" />

See also

1. JavaScript - event on Ctrl+a or cmd+a keys pressed