Javascript Can'；t在任何div上按%调整高度

在过去的几周里，我一直在做一个项目，在使用绝对定位和固定定位最终了解到我想要的设计之后，我正在…移植…我认为我的代码是响应性的。到目前为止，我还没有遇到很多问题，但遇到了一个我似乎无法解决的问题

我相信我理解正确，div只能根据其父类进行调整。如果我理解正确的话，我真的不知道为什么我会有这个问题，因为我正在调整的div是他们自己的类。无论如何，这是我的代码，希望有人能指出我的问题！谢谢作为参考，我正在使用Dreamweaver的流体网格布局模板。我还将navDrop设置为400px，以模拟我想要完成的任务

JS

您需要添加

html, body {
    width: 100%;
    height: 100%;
}

到您的css文件。 这样，主体内部的所有元素都可以设置为相对于主体高度的百分比高度

---

希望这能有所帮助。

您能否指定您试图为哪个div设置高度，以及您试图实现的与当前结果不同的行为？当我把你的代码放在上面的时候，我得到了这个结果…这就是你所期望的：？是的，我确实在指定的navDrop类上面做了编辑。目前，我将该类设置为400px的高度，以演示它应该是什么样子，但我需要使用%以使其具有响应性。事实上，我的任何一个div都不允许我改变它们的高度，但我确信如果我能找到至少一个div的解决方案，那么我可以在任何地方修复它。谢谢尝试将

html{height:100%}

添加到cssDo是否希望div像图像一样按比例缩放（收缩时保留其形状）？或者以其他方式响应？@Markasoftware当我将该行添加到CSS时，navDrop div消失。ryantdecker是的，我需要它根据分辨率进行缩放，这样移动浏览就不会中断流量。很高兴我能帮助你。

* {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    background-color: grey;
    font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, sans-serif
}
body {
    font-family: "Myriad Pro", Helvetica, Arial, sans-serif;
    background: grey;
    width: 100%;
    height: 100%;
    /* Used so 1.6 em = 16pts */
    font-size: 62.5%;
}
#bodyWrap {
    width: 57%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
}
/*Nav Wrapper*/
#navWrapper {
    position: relative;
    width: 57%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
}
/*Banner Wrapper*/
.bannerWrap {
    position: relative;
    width: 57%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
}
/*Banner Styling*/
.banner {
    position: relative;
    width: 100%;
}
/*Main Nav Box Styling*/
.nav {
    position: relative;
    width: 100%;
    list-style:none;
    top: -1px;

    background: #323552;
    background: -moz-linear-gradient(top, #323552, #1a1b24);
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#323552), to(#1a1b24));
}
.nav ul {
    list-style-type: none;
    postion: relative;
    width: 100%;
    height: 3%;
    padding: 0;
    margin: 0;
    background: transparent;
}
/*Main Nav Button Styling*/
.nav li {
    display: inline-block;
    position: relative;
    background: transparent;

}
.nav a {
    padding: 7px 10px;
    display: block;
    background: transparent;
    text-decoration: none;
    font-size: 1.5em;
    text-transform: uppercase;
    opacity: .7;
    color: white;
    -webkit-transition: opacity .2s ease-out;
    -moz-transition: opacity .2s ease-out;
    -o-transition: opacity .2s ease-out;
    transition: opacity .2s ease-out;
}
.nav a:hover {
    color: white;
    opacity: 1;
    -webkit-transition: opacity .2=s ease-in;
    -moz-transition: opacity .2s ease-in;
    -o-transition: opacity .2s ease-in;
    transition: opacity .2s ease-in;
}
.nav > ul > li:hover > a { 
    background: #b9b9b9;
}

/*Drop Down*/
.navDrop {
    position: relative;
    width: 100%;
    height: 400px;
    margin-left: auto;
    margin-right: auto;
    border: 1px black solid;
    overflow: hidden;
    background: white;
}
.navIcon {
    width: 15px;
    height: 15px;
    background: transparent;
    float: left;
    postion: relative;
    margin-top: 5.5px;
}
.navImage {
    display: relative;
    width: 100%;
    height: 170px;
    background: transparent;
    opacity: .2;
    -webkit-transition: opacity .5s ease-out;
    -moz-transition: opacity .5s ease-out;
    -o-transition: opacity .5s ease-out;
    transition: opacity .5s ease-out;
}
.navImage:hover {
    opacity: 1;
    -webkit-transition: opacity .5s ease-in;
    -moz-transition: opacity .5s ease-in;
    -o-transition: opacity .5s ease-in;
    transition: opacity .5s ease-in;
}
.navLeft {
    position: absolute;
    width: 32%;
    left: 1%;
    display: inline-block;
    background: transparent;
}

.navLeft > span {
    display: inline-block;
    font-size: 1.4em;
    font-weight: bold;
    color: #b9b9b9;
    margin-left: auto;
    margin-right: auto;
    background: transparent;
}
.navCenter {
    position: absolute;
    width: 32%;
    left: 35%;
    display: inline-block;
    background: transparent;
}

.navCenter > span {
    display: inline-block;
    font-size: 1.4em;
    font-weight: bold;
    color: #b9b9b9;
    margin-left: auto;
    margin-right: auto;
    background: transparent;
}

.navCenter > a {
    margin: 0;
    padding: 0;
    display: inline-block;
}

.navDropLinks {
    display: inline-block;
    background: transparent;    
}

.navDropLinks > li {
    list-style: none;
    display: inline-block;
}
/*Nav Sub Menu Hyper*/
.navDropLinks > li > a {
    color: black;
    font-size:11px; 
    text-decoration: none;
    font-weight: bold;
    background: transparent;
    color: #b9b9b9;
    float: left;
}
.dropContent {
    position: relative;
    background: transparent;
    color: #b9b9b9;
    text-align: justify;
}
.dropContent > a {
    background: transparent;
    color: #b9b9b9;
    text-align: justify;
    font-size: 1.0em;
    display: inline-block;
    text-decoration:none;
    opacity: .7;
    color: white;
    padding: 0px;
    -webkit-transition: opacity .2s ease-out;
    -moz-transition: opacity .2s ease-out;
    -o-transition: opacity .2s ease-out;
    transition: opacity .2s ease-out;
}

/*! Respond.js v1.0.1pre: min/max-width media query polyfill. (c) Scott Jehl. MIT/GPLv2 Lic. j.mp/respondjs  */
(function(e,h){e.respond={};respond.update=function(){};respond.mediaQueriesSupported=h;if(h){return}var u=e.document,r=u.documentElement,i=[],k=[],p=[],o={},g=30,f=u.getElementsByTagName("head")[0]||r,b=f.getElementsByTagName("link"),d=[],a=function(){var B=b,w=B.length,z=0,y,x,A,v;for(;z<w;z++){y=B[z],x=y.href,A=y.media,v=y.rel&&y.rel.toLowerCase()==="stylesheet";if(!!x&&v&&!o[x]){if(y.styleSheet&&y.styleSheet.rawCssText){m(y.styleSheet.rawCssText,x,A);o[x]=true}else{if(!/^([a-zA-Z]+?:(\/\/)?)/.test(x)||x.replace(RegExp.$1,"").split("/")[0]===e.location.host){d.push({href:x,media:A})}}}}t()},t=function(){if(d.length){var v=d.shift();n(v.href,function(w){m(w,v.href,v.media);o[v.href]=true;t()})}},m=function(G,v,x){var E=G.match(/@media[^\{]+\{([^\{\}]+\{[^\}\{]+\})+/gi),H=E&&E.length||0,v=v.substring(0,v.lastIndexOf("/")),w=function(I){return I.replace(/(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,"$1"+v+"$2$3")},y=!H&&x,B=0,A,C,D,z,F;if(v.length){v+="/"}if(y){H=1}for(;B<H;B++){A=0;if(y){C=x;k.push(w(G))}else{C=E[B].match(/@media ([^\{]+)\{([\S\s]+?)$/)&&RegExp.$1;k.push(RegExp.$2&&w(RegExp.$2))}z=C.split(",");F=z.length;for(;A<F;A++){D=z[A];i.push({media:D.match(/(only\s+)?([a-zA-Z]+)(\sand)?/)&&RegExp.$2,rules:k.length-1,minw:D.match(/\(min\-width:[\s]*([\s]*[0-9]+)px[\s]*\)/)&&parseFloat(RegExp.$1),maxw:D.match(/\(max\-width:[\s]*([\s]*[0-9]+)px[\s]*\)/)&&parseFloat(RegExp.$1)})}}j()},l,q,j=function(E){var v="clientWidth",x=r[v],D=u.compatMode==="CSS1Compat"&&x||u.body[v]||x,z={},C=u.createDocumentFragment(),B=b[b.length-1],w=(new Date()).getTime();if(E&&l&&w-l<g){clearTimeout(q);q=setTimeout(j,g);return}else{l=w}for(var y in i){var F=i[y];if(!F.minw&&!F.maxw||(!F.minw||F.minw&&D>=F.minw)&&(!F.maxw||F.maxw&&D<=F.maxw)){if(!z[F.media]){z[F.media]=[]}z[F.media].push(k[F.rules])}}for(var y in p){if(p[y]&&p[y].parentNode===f){f.removeChild(p[y])}}for(var y in z){var G=u.createElement("style"),A=z[y].join("\n");G.type="text/css";G.media=y;if(G.styleSheet){G.styleSheet.cssText=A}else{G.appendChild(u.createTextNode(A))}C.appendChild(G);p.push(G)}f.insertBefore(C,B.nextSibling)},n=function(v,x){var w=c();if(!w){return}w.open("GET",v,true);w.onreadystatechange=function(){if(w.readyState!=4||w.status!=200&&w.status!=304){return}x(w.responseText)};if(w.readyState==4){return}w.send(null)},c=(function(){var v=false;try{v=new XMLHttpRequest()}catch(w){v=new ActiveXObject("Microsoft.XMLHTTP")}return function(){return v}})();a();respond.update=a;function s(){j(true)}if(e.addEventListener){e.addEventListener("resize",s,false)}else{if(e.attachEvent){e.attachEvent("onresize",s)}}})(this,(function(f){if(f.matchMedia){return true}var e,i=document,c=i.documentElement,g=c.firstElementChild||c.firstChild,h=!i.body,d=i.body||i.createElement("body"),b=i.createElement("div"),a="only all";b.id="mq-test-1";b.style.cssText="position:absolute;top:-99em";d.appendChild(b);b.innerHTML='_<style media="'+a+'"> #mq-test-1 { width: 9px; }</style>';if(h){c.insertBefore(d,g)}b.removeChild(b.firstChild);e=b.offsetWidth==9;if(h){c.removeChild(d)}else{d.removeChild(b)}return e})(this));

/*
/*
 * HTML5 ✰ Boilerplate v3.0.2
 *
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 *
 * Detailed information about this CSS: h5bp.com/css
 * 
 * Dreamweaver modifications:
 * 1. Commented out selection highlight
 * 2. Removed media queries section (we add our own in a separate file)
 *
 * ==|== normalize ==========================================================
 */


/* =============================================================================
   HTML5 display definitions
   ========================================================================== */

article, aside, details, figcaption, figure, footer, header, hgroup, nav, section { display: block; }
audio, canvas, video { display: inline-block; *display: inline; *zoom: 1; }
audio:not([controls]) { display: none; }
[hidden] { display: none; }

/* =============================================================================
   Base
   ========================================================================== */

/*
 * 1. Correct text resizing oddly in IE6/7 when body font-size is set using em units
 * 2. Prevent iOS text size adjust on device orientation change, without disabling user zoom: h5bp.com/g
 */

html { font-size: 100%; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; }

html, button, input, select, textarea { font-family: serif; color: #222; }

body { margin: 0; font-size: 1em; line-height: 1.4; }

/* 
 * Remove text-shadow in selection highlight: h5bp.com/i
 * These selection declarations have to be separate
 * Also: hot pink! (or customize the background color to match your design)
 */

/* Dreamweaver: uncomment these if you do want to customize the selection highlight
 *::-moz-selection { background: #fe57a1; color: #fff; text-shadow: none; }
 *::selection { background: #fe57a1; color: #fff; text-shadow: none; }
 */

/* =============================================================================
   Links
   ========================================================================== */

a { color: #00e; }
a:visited { color: #551a8b; }
a:hover { color: #06e; }
a:focus { outline: thin dotted; }

/* Improve readability when focused and hovered in all browsers: h5bp.com/h */
a:hover, a:active { outline: 0; }


/* =============================================================================
   Typography
   ========================================================================== */

abbr[title] { border-bottom: 1px dotted; }

b, strong { font-weight: bold; }

blockquote { margin: 1em 40px; }

dfn { font-style: italic; }

hr { display: block; height: 1px; border: 0; border-top: 1px solid #ccc; margin: 1em 0; padding: 0; }

ins { background: #ff9; color: #000; text-decoration: none; }

mark { background: #ff0; color: #000; font-style: italic; font-weight: bold; }

/* Redeclare monospace font family: h5bp.com/j */
pre, code, kbd, samp { font-family: monospace, serif; _font-family: 'courier new', monospace; font-size: 1em; }

/* Improve readability of pre-formatted text in all browsers */
pre { white-space: pre; white-space: pre-wrap; word-wrap: break-word; }

q { quotes: none; }
q:before, q:after { content: ""; content: none; }

small { font-size: 85%; }

/* Position subscript and superscript content without affecting line-height: h5bp.com/k */
sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; }
sup { top: -0.5em; }
sub { bottom: -0.25em; }


/* =============================================================================
   Lists
   ========================================================================== */

ul, ol { margin: 1em 0; padding: 0 0 0 40px; }
dd { margin: 0 0 0 40px; }
nav ul, nav ol { list-style: none; list-style-image: none; margin: 0; padding: 0; }


/* =============================================================================
   Embedded content
   ========================================================================== */

/*
 * 1. Improve image quality when scaled in IE7: h5bp.com/d
 * 2. Remove the gap between images and borders on image containers: h5bp.com/i/440
 */

img { border: 0; -ms-interpolation-mode: bicubic; vertical-align: middle; }

/*
 * Correct overflow not hidden in IE9
 */

svg:not(:root) { overflow: hidden; }


/* =============================================================================
   Figures
   ========================================================================== */

figure { margin: 0; }


/* =============================================================================
   Forms
   ========================================================================== */

form { margin: 0; }
fieldset { border: 0; margin: 0; padding: 0; }

/* Indicate that 'label' will shift focus to the associated form element */
label { cursor: pointer; }

/*
 * 1. Correct color not inheriting in IE6/7/8/9
 * 2. Correct alignment displayed oddly in IE6/7
 */

legend { border: 0; *margin-left: -7px; padding: 0; white-space: normal; }

/*
 * 1. Correct font-size not inheriting in all browsers
 * 2. Remove margins in FF3/4 S5 Chrome
 * 3. Define consistent vertical alignment display in all browsers
 */

button, input, select, textarea { font-size: 100%; margin: 0; vertical-align: baseline; *vertical-align: middle; }

/*
 * 1. Define line-height as normal to match FF3/4 (set using !important in the UA stylesheet)
 */

button, input { line-height: normal; }

/*
 * 1. Display hand cursor for clickable form elements
 * 2. Allow styling of clickable form elements in iOS
 * 3. Correct inner spacing displayed oddly in IE7 (doesn't effect IE6)
 */

button, input[type="button"], input[type="reset"], input[type="submit"] { cursor: pointer; -webkit-appearance: button; *overflow: visible; }

/*
 * Re-set default cursor for disabled elements
 */

button[disabled], input[disabled] { cursor: default; }

/*
 * Consistent box sizing and appearance
 */

input[type="checkbox"], input[type="radio"] { box-sizing: border-box; padding: 0; *width: 13px; *height: 13px; }
input[type="search"] { -webkit-appearance: textfield; -moz-box-sizing: content-box; -webkit-box-sizing: content-box; box-sizing: content-box; }
input[type="search"]::-webkit-search-decoration, input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; }

/*
 * Remove inner padding and border in FF3/4: h5bp.com/l
 */

button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0; }

/*
 * 1. Remove default vertical scrollbar in IE6/7/8/9
 * 2. Allow only vertical resizing
 */

textarea { overflow: auto; vertical-align: top; resize: vertical; }

/* Colors for form validity */
input:valid, textarea:valid {  }
input:invalid, textarea:invalid { background-color: #f0dddd; }


/* =============================================================================
   Tables
   ========================================================================== */
/* 
 * 'border-collapse: collapse;' needs to be overridden in designs having tables with rounded corners and drop shadows.
*/
table { border-collapse: collapse; border-spacing: 0; }
td { vertical-align: top; }

/* =============================================================================
   Chrome Frame Prompt
   ========================================================================== */

.chromeframe { margin: 0.2em 0; background: #ccc; color: black; padding: 0.2em 0; }


/* ==|== primary styles =====================================================
   Author:
   ========================================================================== */
















/* ==|== non-semantic helper classes ========================================
   Please define your styles before this section.
   ========================================================================== */

/* For image replacement */
.ir { display: block; border: 0; text-indent: -999em; overflow: hidden; background-color: transparent; background-repeat: no-repeat; text-align: left; direction: ltr; *line-height: 0; }
.ir br { display: none; }

/* Hide from both screenreaders and browsers: h5bp.com/u */
.hidden { display: none !important; visibility: hidden; }

/* Hide only visually, but have it available for screenreaders: h5bp.com/v */
.visuallyhidden { border: 0; clip: rect(0 0 0 0); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; }

/* Extends the .visuallyhidden class to allow the element to be focusable when navigated to via the keyboard: h5bp.com/p */
.visuallyhidden.focusable:active, .visuallyhidden.focusable:focus { clip: auto; height: auto; margin: 0; overflow: visible; position: static; width: auto; }

/* Hide visually and from screenreaders, but maintain layout */
.invisible { visibility: hidden; }

/* Contain floats: h5bp.com/q */
.clearfix:before, .clearfix:after { content: ""; display: table; }
.clearfix:after { clear: both; }
.clearfix { *zoom: 1; }


/* ==|== print styles =======================================================
   Print styles.
   Inlined to avoid required HTTP connection: h5bp.com/r
   ========================================================================== */

@media print {
  * { background: transparent !important; color: black !important; box-shadow:none !important; text-shadow: none !important; filter:none !important; -ms-filter: none !important; } /* Black prints faster: h5bp.com/s */
  a, a:visited { text-decoration: underline; }
  a[href]:after { content: " (" attr(href) ")"; }
  abbr[title]:after { content: " (" attr(title) ")"; }
  .ir a:after, a[href^="javascript:"]:after, a[href^="#"]:after { content: ""; }  /* Don't show links for images, or javascript/internal links */
  pre, blockquote { border: 1px solid #999; page-break-inside: avoid; }
  thead { display: table-header-group; } /* h5bp.com/t */
  tr, img { page-break-inside: avoid; }
  img { max-width: 100% !important; }
  @page { margin: 0.5cm; }
  p, h2, h3 { orphans: 3; widows: 3; }
  h2, h3 { page-break-after: avoid; }
}

html, body {
    width: 100%;
    height: 100%;
}