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Iframe 100% height inside body with padding

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梦如初夏
梦如初夏 2020-12-05 14:52

I have an iframe in my HTML document and I\'m having a bit of trouble.

I also have a URL bar (fixed position element) at the top of the page that should stay with th

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4条回答
  • 长发绾君心
    2020-12-05 15:06

    It can be done without any Javascript, works in IE7

    CSS:

    body {
    overflow-y: hidden;
}

#imagepgframe { 
    width: 100%;
    height: 100%;
    position: absolute;
}

#wrap { 
    width: 100%;
    position: absolute;
    top: 100px; 
    left: 0;
    bottom: 0;
}

    HTML:

    <div id="wrap"> 
    <iframe  id="imagepgframe" frameBorder="0" src="http://en.wikipedia.org/wiki/Internet_Explorer_7"></iframe>
</div>
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  • 有刺的猬
    2020-12-05 15:20

    Whilst you can't say ‘height: 100% minus some pixels’ in CSS, you can make the iframe 100% high, then push its top down using padding. Then you can take advantage of the CSS3 box-sizing property to make the padding get subtracted from the height.

    This:

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html><head>
    <title>test</title>
    <style type="text/css">
        html, body { margin: 0; padding: 0; height: 100%; }
        #bar { height: 32px; background: red; }
        iframe {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            border: none; padding-top: 32px;
            box-sizing: border-box; -moz-box-sizing: border-box; -webkit-box-sizing: border-box;
        }
    </style>
</head><body>
    <iframe src="http://www.google.com/"></iframe>
    <div id="bar">foo</div>
<body></html>

    Works on IE8, Moz, Op, Saf, Chrome. You'd have to carry on using a JavaScript fallback to make the extra scrollbar disappear for browsers that don't support box-sizing though (in particular IE up to 7).

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  • 暗喜
    2020-12-05 15:26

    To build on top of bobince's answer:

    Erik Arvidsson came up with a way to (kinda, sorta) add box-sizing support to IE6/IE7. However, his solution doesn't support units other than px. Like you, I needed a percentage height, so I added support for percents.

    Once you've downloaded and unzipped the zip file, open boxsizing.htc and replace the following border/padding functions:

    /* border width getters */
function getBorderWidth(el, sSide) {
    if (el.currentStyle["border" + sSide + "Style"] == "none")
        return 0;
    var n = parseInt(el.currentStyle["border" + sSide + "Width"]);
    return n || 0;
}

function getBorderLeftWidth()   { return getBorderWidth((arguments.length > 0 ? arguments[0] : element), "Left"); }
function getBorderRightWidth()  { return getBorderWidth((arguments.length > 0 ? arguments[0] : element), "Right"); }
function getBorderTopWidth()    { return getBorderWidth((arguments.length > 0 ? arguments[0] : element), "Top"); }
function getBorderBottomWidth() { return getBorderWidth((arguments.length > 0 ? arguments[0] : element), "Bottom"); }
/* end border width getters */

/* padding getters */
function getPadding(el, sSide) {
    var n = parseInt(el.currentStyle["padding" + sSide]);
    return n || 0;
}

function getPaddingLeft()   { return getPadding((arguments.length > 0 ? arguments[0] : element), "Left"); }
function getPaddingRight()  { return getPadding((arguments.length > 0 ? arguments[0] : element), "Right"); }
function getPaddingTop()    { return getPadding((arguments.length > 0 ? arguments[0] : element), "Top"); }
function getPaddingBottom() { return getPadding((arguments.length > 0 ? arguments[0] : element), "Bottom"); }
/* end padding getters */

    Then replace updateBorderBoxWidth and updateBorderBoxHeight with the following:

    function updateBorderBoxWidth() {
    element.runtimeStyle.width = "";
    if (getDocumentBoxSizing() == getBoxSizing())
        return;
    var csw = element.currentStyle.width;
    var w = null;
    if (csw != "auto" && csw.indexOf("px") != -1) {
        w = parseInt(csw);
    } else if (csw != "auto" && csw.indexOf("%") != -1) {
        var origDisplay = element.runtimeStyle.display;
        element.runtimeStyle.display = "none";

        w = Math.max(0, (parseInt(element.parentNode.clientWidth) - (
                getBorderLeftWidth(element.parentNode)
                 + getPaddingLeft(element.parentNode)
                 + getPaddingRight(element.parentNode)
                 + getBorderRightWidth(element.parentNode)
        )) * (parseInt(csw) / 100));

        element.runtimeStyle.display = origDisplay;
    }
    if (w !== null) {
        if (getBoxSizing() == "border-box") {
            setBorderBoxWidth(w);
        } else {
            setContentBoxWidth(w);
        }
    }
}

function updateBorderBoxHeight() {
    element.runtimeStyle.height = "";   
    if (getDocumentBoxSizing() == getBoxSizing())
        return;
    var csh = element.currentStyle.height;
    var h = null;
    if (csh != "auto" && csh.indexOf("px") != -1) {
        h = parseInt(csh);
    } else if (csh != "auto" && csh.indexOf("%") != -1) {
        var origDisplay = element.runtimeStyle.display;
        element.runtimeStyle.display = "none";

        h = Math.max(0, (parseInt(element.parentNode.clientHeight) - (
                getBorderTopWidth(element.parentNode)
                + getPaddingTop(element.parentNode)
                + getPaddingBottom(element.parentNode)
                + getBorderBottomWidth(element.parentNode)
        )) * (parseInt(csh) / 100));

        element.runtimeStyle.display = origDisplay;
    }
    if (h !== null) {
        if (getBoxSizing() == "border-box") {
            setBorderBoxHeight(h);
        } else {
            setContentBoxHeight(h);
        }
    }
}

    Then just use the file as you would otherwise:

    .border-box {
    behavior:           url("boxsizing.htc");
    box-sizing:         border-box;
    -moz-box-sizing:    border-box;
    -webkit-box-sizing: border-box;
}

    Here's a pretty thorough test I put together while developing my modifications:

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
    <head>
        <title>box-sizing: border-box;</title>
        <style type="text/css">
            html, body {
                margin:     0;
                padding:    0;
                width:      100%;
                height:     100%;
                background: yellow;
            }
            body {
                padding-top:    50px;
                padding-bottom: 50px;
            }
            p {
                margin: 0;
            }

                #header, #footer {
                    height:   50px;
                    position: absolute;
                    width:    100%;
                    overflow: hidden;
                }
                    #header {
                        background: red;
                        top:        0;
                    }
                    #footer {
                        background: blue;
                        bottom:     0;
                    }

                #content {
                    width:          100%;
                    height:         100%;
                    border:         none;
                    margin:         0;
                    padding:        0;
                    background:     black;
                    color:          white;
                    overflow:       auto;
                    position:       relative;
                    padding-top:    40px;
                    padding-bottom: 40px;
                }

                        #nested-header, #nested-footer {
                            position:   absolute;
                            height:     40px;
                            width:      100%;
                            background: #CCC;
                        }
                            #nested-header {
                                top: 0;
                            }
                            #nested-footer {
                                bottom: 0;
                            }

                        #nested-content-wrap {
                            height: 100%;
                        }
                            #nested-floater {
                                height: 100%;
                                float:  left;
                                width:  100px;
                            }
                            #nested-content {
                                height:     100%;
                                background: green;
                                color:      black;
                                overflow:   auto;
                                position:   relative;
                            }

                                #inner-nest {
                                    height:   100%;
                                    position: relative;
                                }
                                    #inner-head {
                                        height:     30px;
                                        width:      100%;
                                        background: #AAA;
                                        position:   absolute;
                                        top:        0;
                                    }
                                    #inner-content {
                                        padding-top: 30px;
                                        height:      100%;
                                        overflow:    auto;
                                    }

                .border-box {
                    behavior:           url("boxsizing.htc");
                    box-sizing:         border-box;
                    -moz-box-sizing:    border-box;
                    -webkit-box-sizing: border-box;
                }

                .content-box {
                    behavior:           url("boxsizing.htc");
                    box-sizing:         content-box;
                    -moz-box-sizing:    content-box;
                    -webkit-box-sizing: content-box;
                }

                legend {
                    color: black;
                }

                form {
                    margin: 1em 0;
                }

                .wrap {
                    height:     100px;
                    background: #000;
                    overflow:   hidden;
                }

                .test {
                    width:          100px;
                    height:         100%;
                    background:     #AAA;
                    border-color:   #EEE;
                    padding-left:   20px;
                    padding-top:    20px;
                    padding-bottom: 5px;
                    float:          left;
                }

                .fill {
                    width:      100%;
                    height:     100%;
                    background: #CCC;
                }

                .gauge {
                    width:        99px;
                    background:   white;
                    border-right: 1px solid green;
                    height:       100%;
                    float:        left;
                }

                .notes {
                    background: #8FC561;
                }

                .clear {
                    clear: both;
                }

                /* 120px x 120px square; this will create a black 20px frame on the inside */
                .boxtest-wrapper {
                    width:      100px;
                    height:     100px;
                    float:      left;
                    background: black;
                    color:      white;
                    margin:     1em;
                    padding:    20px;
                }

                #boxtest-4-container {
                    width:  100%;
                    height: 100%;
                }

                .boxtest {
                    width:      100%;
                    height:     100%;
                    background: white;
                    color:      black;
                    border:     5px solid green;
                    overflow:   hidden;
                }
        </style>
        <script type="text/javascript">
            function addBorderBox() {
                var wrap1 = document.getElementById("wrap-1");
                var wrap2 = document.getElementById("wrap-2");

                var borderBox = document.createElement("div");
                borderBox.className = "test border-box";

                var borderBoxFill = document.createElement("div");
                borderBoxFill.className = "fill";

                var borderBoxContent = document.createTextNode("Generated border box fill");

                borderBoxFill.appendChild(borderBoxContent);
                borderBox.appendChild(borderBoxFill);

                var gauge = document.createElement("div");
                gauge.className = "gauge";

                var gaugeText1 = "width: 100px";
                var gaugeText2 = "height: 100%";
                var gaugeText3 = "bottom should be visible";

                gauge.appendChild(document.createTextNode(gaugeText1));
                gauge.appendChild(document.createElement("br"));
                gauge.appendChild(document.createTextNode(gaugeText2));
                gauge.appendChild(document.createElement("br"));
                gauge.appendChild(document.createTextNode(gaugeText3));

                wrap1.appendChild(borderBox);
                wrap2.appendChild(gauge);
            }
        </script>
    </head>
    <body id="body" class="border-box">
        <div id="header">
            <p>Header - 50px;</p>
        </div>
        <div id="content" class="border-box">
            <div id="nested-header">
                <p>Nested Header - 40px;</p>
            </div>
            <div id="nested-content-wrap">
                <div id="nested-floater">
                    <p>Float - 100px;</p>
                    <ul>
                        <li>This element should never scroll.</li>
                    </ul>
                </div>
                <div id="nested-content">
                    <div id="inner-nest">
                        <div id="inner-head">
                            <p>Inner Head - 30px;</p>
                        </div>
                        <div id="inner-content" class="border-box">
                            <div style="float: right; ">
                                <p>The fourth square should look just like the other three:</p>

                                <div id="boxtest-wrapper-1" class="boxtest-wrapper">
                                    <div id="boxtest-1" class="boxtest border-box"></div>
                                </div>
                                <div id="boxtest-wrapper-2" class="boxtest-wrapper">
                                    <div id="boxtest-2" class="boxtest border-box"></div>
                                </div>
                                <br class="clear" />
                                <div id="boxtest-wrapper-3" class="boxtest-wrapper">
                                    <div id="boxtest-3" class="boxtest border-box"></div>
                                </div>
                                <div id="boxtest-wrapper-4" class="boxtest-wrapper">
                                    <div id="boxtest-4-container">
                                    <!-- boxtest-4-container isn't special in any way. it just has width and height set to 100%. -->
                                        <div id="boxtest-4" class="boxtest border-box"></div>
                                    </div>
                                </div>
                            </div>

                            <p>Inner Content - fluid</p>

                            <ul>
                                <li>The top of the scrollbar should be covered by the &ldquo;Inner Head&rdquo; element.</li>
                                <li>The bottom of the scrollbar should be visible without having to scroll &ldquo;Inner Head&rdquo; out of view.</li>
                            </ul>

                            <p>Document Compat Mode:
                                <strong id="compatMode">
                                    <script type="text/javascript">
                                        var compatMode = document.compatMode;
                                        if (compatMode != "CSS1Compat") {
                                            document.getElementById("compatMode").style.color = "red";
                                        }
                                        document.write(compatMode);
                                    </script>
                                </strong>
                            </p><br />

                            <div class="notes">
                                <h2>Notes</h2>
                                <ul>
                                    <li>In IE6 and IE7 (and possibly IE8; untested), you'll notice a slight shift of contents that have <code>box-sizing</code> set to <code>border-box</code>. This is the amount of time it takes for <a href="box-sizing.htc">box-sizing.htc</a> to finish downloading.</li>
                                    <li>This workaround is not live. Anything that causes a <a href="http://www.phpied.com/rendering-repaint-reflowrelayout-restyle/">reflow or repaint</a> will not currently trigger an update to widths and heights of <code>border-box</code> elements.</li>
                                    <li>See <a href="http://webfx.eae.net/dhtml/boxsizing/boxsizing.html">http://webfx.eae.net/dhtml/boxsizing/boxsizing.html</a> for the original solution to the IE6/IE7 <code>border-box</code> problem. <a href="box-sizing.htc">box-sizing.htc</a> has been modified to allow for percentage widths and heights.</li>
                                    <li>To see what this example should look like without the use of <a href="box-sizing.htc">box-sizing.htc</a>, view it in Firefox or IE8.</li>
                                </ul>
                            </div>

                            <br class="clear" />
                            <form>
                                <fieldset>
                                    <legend>DOM Update Test</legend>
                                    <input type="button" value="Click to add border-box" onclick="addBorderBox(); " />
                                </fieldset>
                            </form>

                            <div id="wrap-1" class="wrap">
                                <div class="test content-box" id="content-box-1" style="border-width: 5px; border-style: solid;">
                                    <div class="fill">Content box fill</div>
                                </div>
                                <div class="test content-box" id="content-box-2" style="border-width: 5px; border-style: solid; padding: 5px;">
                                    <div class="fill">Content box fill</div>
                                </div>
                                <div class="test border-box" id="border-box-1" style="border-width: 5px; border-style: solid;">
                                    <div class="fill">Border box fill</div>
                                </div>
                                <div class="test border-box" id="border-box-2" style="border-width: 5px; border-style: solid; padding: 5px;">
                                    <div class="fill">Border box fill</div>
                                </div>
                                <div class="test" id="default-box-1" style="border-width: 5px; border-style: solid;">
                                    <div class="fill">Default box fill</div>
                                </div>
                                <div class="test" id="default-box-2" style="border-width: 5px; border-style: solid; padding: 5px;">
                                    <div class="fill">Default box fill</div>
                                </div>
                            </div>
                            <div id="wrap-2" class="wrap">
                                <!-- subtract 1 from width for 1px right border -->
                                <div class="gauge" style="width: 129px;">width: 130px<br />height: 100%<br />bottom should be cut off</div>
                                <div class="gauge" style="width: 119px;">width: 120px<br />height: 100%<br />bottom should be cut off</div>
                                <div class="gauge">width: 100px<br />height: 100%<br />bottom should be visible</div>
                                <div class="gauge">width: 100px<br />height: 100%<br />bottom should be visible</div>
                                <div class="gauge" style="width: 129px;">width: 130px<br />height: 100%<br />bottom should be cut off</div>
                                <div class="gauge" style="width: 119px;">width: 120px<br />height: 100%<br />bottom should be cut off</div>
                            </div>
                            <br class="clear" />

                            <script type="text/javascript">
                                var lipsum = "<p>Lorem ipsum dolor sit amet.</p>";

                                for (var i = 0; i < 100; i++) {
                                    document.write(lipsum);
                                }
                            </script>
                        </div>
                    </div>
                </div>
            </div>
            <div id="nested-footer">
                <p>Nested Footer - 40px;</p>
            </div>
        </div>
        <div id="footer">
            <p>Footer - 50px;</p>
        </div>
    </body>
</html>
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  • 天涯浪人
    2020-12-05 15:27

    If by covering up part of the page, you mean the page displayed in the iframe, one thought might be to add a top margin to your iframe, using the margin-top: property in CSS. This would eliminate the scroll bar given that you properly constrained the height of the iframe.

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