Function getWidthOrHeight

2.0.3/2.0.3.js:6550–6591

( elem, name, extra )

    }

    function getWidthOrHeight( elem, name, extra ) {

        // Start with offset property, which is equivalent to the border-box value
        var valueIsBorderBox = true,
            val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
            styles = getStyles( elem ),
            isBorderBox = jQuery.support.boxSizing && jQuery.css( elem, "boxSizing", false, styles ) === "border-box";

        // some non-html elements return undefined for offsetWidth, so check for null/undefined
        // svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
        // MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
        if ( val <= 0 || val == null ) {
            // Fall back to computed then uncomputed css if necessary
            val = curCSS( elem, name, styles );
            if ( val < 0 || val == null ) {
                val = elem.style[ name ];
            }

            // Computed unit is not pixels. Stop here and return.
            if ( rnumnonpx.test(val) ) {
                return val;
            }

            // we need the check for style in case a browser which returns unreliable values
            // for getComputedStyle silently falls back to the reliable elem.style
            valueIsBorderBox = isBorderBox && ( jQuery.support.boxSizingReliable || val === elem.style[ name ] );

            // Normalize "", auto, and prepare for extra
            val = parseFloat( val ) || 0;
        }

        // use the active box-sizing model to add/subtract irrelevant styles
        return ( val +
            augmentWidthOrHeight(
                elem,
                name,
                extra || ( isBorderBox ? "border" : "content" ),
                valueIsBorderBox,
                styles
            )
            ) + "px";
    }

// Try to determine the default display value of an element
    function css_defaultDisplay( nodeName ) {