How to Make Text Unselectable in HTML?

How to Render Unselectable HTML Text: A Detailed Explanation

The question arises: how to make text on a webpage unselectable, preventing the cursor from changing to a text-selecting cursor upon hovering. This behavior is typically observed on buttons, such as those found on the Stack Overflow website.

CSS3 Solution

For modern browsers, a CSS3 solution suffices:

.unselectable {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

To apply this style, add the unselectable class to the label element:

<label class="unselectable">Unselectable label</label>

JavaScript Fallback

For older browsers, a JavaScript fallback is necessary:

function disableSelection(element) {
    if (typeof element.onselectstart != 'undefined') {
        element.onselectstart = function() { return false; };
    } else if (typeof element.style.MozUserSelect != 'undefined') {
        element.style.MozUserSelect = 'none';
    } else {
        element.onmousedown = function() { return false; };
    }
}

window.onload = function() {
    var labels = document.getElementsByTagName('label');
    for (var i = 0; i < labels.length; i++) {
        disableSelection(labels[i]);
    }
};

jQuery Solution

If jQuery is used, extend the disableSelection() function:

$.fn.extend({ 
    disableSelection: function() { 
        this.each(function() { 
            if (typeof this.onselectstart != 'undefined') {
                this.onselectstart = function() { return false; };
            } else if (typeof this.style.MozUserSelect != 'undefined') {
                this.style.MozUserSelect = 'none';
            } else {
                this.onmousedown = function() { return false; };
            }
        }); 
    } 
});

Then apply it to label elements:

$(document).ready(function() {
    $('label').disableSelection();            
});

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