Copy text/content when press button (clipboard) Javascript / jQuery.

As of 2016, you can now copy text to the clipboard in most browsers (everywhere except Safari) because most browsers have the ability to pro-grammatically copy a selection of text to the clipboard using document.execCommand("copy") that works off a selection.

As with some other actions in a browser (like opening a new window), the copy to clipboard can only be done via a specific user action (like a mouse click). For example, it cannot be done via a timer.

Here's a code example:

HTML

<div class="showCodeWrapper">
    <btn class="btn btn-default copyMe">
        <i class="fa fa-clipboard"></i>
        Copy
    </btn>
    <textarea data-app-type="countdown-timer" class="form-control embedShortcode showCode selectAll" readonly="">test</textarea>
</div>

jQuery

<script>
    $( "li.third-item" ).siblings().css( "background-color", "green" );
$(document).on("click", ".copyMe", function() {
   
    var e = $(this).siblings("textarea")[0];
    e.select();
    try {
        if (!document.execCommand("copy")) throw "Copy unsuccessful";
        $(this).hide().html('<i class="fa fa-check"></i> Copied').fadeIn("fast")
    } catch (t) {
        $(this).hide().html("Press &#8984;+C to copy.").fadeIn("fast"), debug("Copying text error " + t)
    }
})
</script>