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要素の縦横サイズを小数点以下も含めて取得する

Last updated at Posted at 2017-11-03

jQuery1系では小数点以下のサイズが取得できず困ったため備忘録。
Web APIの「getComputedStyle」で取得できる。
古いWebブラウザでは一部仕様が異なるか、非対応。参照元が詳しい。

(function ($) {
    "use strict";

    // Document ready
    $(function () {

            $('.target').each(function(i) {
                var tag = $(this).get(0).tagName.toLowerCase();
                if(tag === 'img'){
    
                    var style, w, h;
                    if (getComputedStyle) {
                        style = getComputedStyle($(this).get(0), '');
                        w = style.getPropertyValue('width');
                        h = style.getPropertyValue('height');
                    } else {
                        // for ie8 or less
                        style = $(this).get(0).currentStyle();
                        w = style.width;
                        h = style.height;
                    }

                    console.log('No.' + i + ' = width:' + w + ' height:' + h);
        
                }else{
                    console.log('not img tag : ' + tag + ' ' + i);
                }
            });

    });
})(jQuery);

【参照元】

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