Wednesday, June 24, 2015

Pure CSS Cross-Browser Multi-Line Text with Ellipsis

There are two common ways to do Multi-Line text with ellipsis.  The first is to use CSS that only works on webkit browsers.  The second is to use a javascript plugin.  Below is a third solution that uses pure CSS and works for all browsers.

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...


[div class="container"]
    [div class="text"]
        [[Text]]
    [/div]
    [div class="ellipsis"]...[/div]
[/div]


[style]
    body {
       margin: 20px;
    }
    .container{
        position: relative;
        background-color: #bbb;
        padding: 20px;
    }
    .text {
       overflow: hidden;
       /*text-overflow: ellipsis; Not needed */
       line-height: 16px;
       max-height: 48px; /* Multiples of line-height */
    }
    .ellipsis {
        position: absolute;
        bottom: 20px;
        right: 20px;
        height: 16px;
        width: 30px;
        background-color: inherit;
        padding-left: 8px;
    }

[/style]

The pure css solution works when the text overflows the available space. However, short text strings do not overflow the space and should not be given an ellipsis.

To solve the short text problem, Implement the javascript solution, below, as well:

[script]
    function getTextWidth(text, font) {
        var canvas = getTextWidth.canvas ||
            (getTextWidth.canvas = document.createElement("canvas"));
        var context = canvas.getContext("2d");
        context.font = font;
        var metrics = context.measureText(text);
        return metrics.width;
    };

    $(".container").each(function() {
        if (getTextWidth(
            $(this).find(".text").text(),
            $(this).find(".text").css("font")
            ) < ($(this).find(".text").width() * 3)) {  // Multiplier is number of lines to show
                $(this).find(".ellipsis").remove();
            }
    });

[/script]

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