jquery - Why do different browsers render the same HTML differently?

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jquery - Why do different browsers render the same HTML differently?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

jquery - Why do different browsers render the same HTML differently?

This is an html page :

<html>
<head>
<title>
Frame Set
</title>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<link rel="stylesheet" href="frame.css" type="text/css" media="screen" />

<script language="JavaScript" type="text/javascript">
$(document).ready(function() {
    var winSize = $(window).width();
    var margin = (winSize-1000)/2;;
    $('#main').css({'margin-left':margin,'margin-right':margin});  
    }
)
$(function() {
  $(".frame").each(function() {
     var width = ($(this).find('.h').width()), 
         height = $(this).find('.l').height(),
         pad = $(this).find('.h').position().left,
         actWidth = width + 10,
         nHeight = height - (height * 2),
         rLeftMargin = actWidth - 1,
         bWidth = actWidth;

    $(this).find('.r').css({'margin-top':nHeight, 'margin-left':rLeftMargin, 'height':height});
    $(this).find('.h').css({'height':25});
    $(this).find('.b').css({'width':bWidth, 'margin-top':0});
  });
});
</script>
</head>
<body>
<div id="main" align="center" style="width:1000px; height:100%; text-align:left;">
    <div id="inner1" style="width:100%; height:20%; float:top; margin-bottom: 20px;">
        <div id="inner11">
            <div class="frame">
                <div class="h" style="width:100%">Header</div>
                <div class="l" style="height:93%"></div>
                <div class="r"></div>
                <div class="b"></div>
            </div>
        </div>
    </div>
    <div id="inner2" style="width:100%; height:60%;">
        <div id="inner21" style="width:69%; float:left; margin-left: 1px; margin-right: 1px;">
            <div class="frame">
                <div class="h" style="width:100%">Left Frame</div>
                <div class="l" style="height:93%"></div>
                <div class="r"></div>
                <div class="b"></div>
            </div>
        </div>
        <div id="inner22" style="width:29%; float:right; margin-left: 1px; margin-right: 1px;">
            <div class="frame">
                <div class="h" style="width:100%">Right Frame</div>
                <div class="l" style="height:93%"></div>
                <div class="r"></div>
                <div class="b"></div>
            </div>
        </div>
    </div>
    <div id="inner3" style="width:100%; height:20%; float:bottom; margin: 2px 2px 2px 2px;">
        <div id="inner23">
            <div class="frame">
                <div class="h" style="width:100%">Footer</div>
                <div class="l" style="height:93%"></div>
                <div class="r"></div>
                <div class="b"></div>
            </div>
        </div>
    </div>
</div>
</body>
</html>

This is Mozilla output :

alt text

This is IE8 output :

alt text

What is the problem ?

See Question&Answers more detail:os

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1 Answer

深蓝 · Answer 1 · 2021-10-23T17:43:17+0000

How to fix this page

Let's help you out here a bit...

Use a Doctype

See @Topera's answer

To make everything center aligned

Please do not use

var winSize = $(window).width();
var margin = (winSize-1000)/2;;
  $('#main').css({'margin-left':margin,'margin-right':margin});  
}

Instead, use the CSS property margin: 0 auto. As a rule of thumb, always use a CSS solution instead of a Javascript where possible.

To create equal height columns

See:
http://www.positioniseverything.net/articles/onetruelayout/equalheight
http://matthewjamestaylor.com/blog/equal-height-columns-cross-browser-css-no-hacks

Use the correct terminology and better class name

To avoid confusion, please do not refer to non-frame elements as frames. For more about what frames are, see: http://reference.sitepoint.com/html/elements-frames-windows

Give your classes meaningful names. The reason for this is the same for any other language - so that when you come back later three month later you won't be scratching your head at classes named l, r and h.

Use semantically valid HTML

The align and text-align attributes are officially deprecated; please see the above solution on making things center aligned and the CSS property text-align property instead.

HTML elements give meaning to the content they are wrapped in. The headers you have for each 'frame' should be marked up with <h2> or <h3> headings instead - while divs are generic block level elements with no meaning, the h1 to h6 set of elements (for want of a better word) tells the browser that the text contained in them are headings.

CSS Box Model

Please have a look at how the box model and floats work in CSS. bottom and top are not valid values for the CSS float property.

http://dev.opera.com/articles/view/30-the-css-layout-model-boxes-border/#cssboxmodels
http://reference.sitepoint.com/css/boxmodel
http://www.smashingmagazine.com/2007/05/01/css-float-theory-things-you-should-know/

The Real Problem Here

is not with the browsers. IE8 surprisingly misbehaves much less than its predecessors. Try writing better HTML and CSS instead.

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jquery - Why do different browsers render the same HTML differently?

jquery - Why do different browsers render the same HTML differently?

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1 Answer

How to fix this page

Use a Doctype

To make everything center aligned

To create equal height columns

Use the correct terminology and better class name

Use semantically valid HTML

CSS Box Model

The Real Problem Here

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