HTML – how can I show tooltip ONLY when ellipsis is activated

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Here’s a way that does it using the built-in ellipsis setting, and adds the title attribute on-demand (with jQuery) building on Martin Smith’s comment:

$('.mightOverflow').bind('mouseenter', function(){
    var $this = $(this);

    if(this.offsetWidth < this.scrollWidth && !$this.attr('title')){
        $this.attr('title', $this.text());
    }
});

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