CSS Width Above 100%

Css width above 100%

Yes, as per the CSS 2.1 Specification, all non-negative values are valid for width, that includes percentage values above 100%.

CSS 100% width is more that 100%

Here you go:

body{    margin:0px;}div {    border-radius: 10px;}#wrapper {    padding: 0%;}#wrap {    float: left;    position: relative;    width: 100%;}#header {    position:fixed;    width:inherit;    z-index:1;    padding:0px;    height:50px;    border-radius:10px;    background-color: #80B7ED;}.left {    background-color: #5A9DE0;    height: 400px;    width: 20%;    float: left;    position: relative;}.right {    background-color: #BFD9F2;    height: 400px;    width: 80%;    float: right;    position: relative;}#footer {    background-color: #80B7ED;    clear: both;    height:70px;}

<html><body><div id="wrapper">    <div id="wrap">        <div id="header"></div>    </div></div><div class="left"></div><div class="right"></div><div id="footer"></div></body></html>

Html width 100%

A block level element (display:block;) will automatically take up 100% of the width of the parent element. You can resize its width using percentages or pixels. Inline elements (display:inline;) cannot have their width modified.

If you want something to take up all the parent elements space I suggest you try something like this:

.class{
    display:block;
    width:100%;
}

div width greater than 100% and hide overflowing part out of the viewport

You need to wrap your div with another, and then overflow-hidden the wrapping element. For instance:

https://jsfiddle.net/5oorwmxd/3/

CSS:

.wrapper{
  overflow:hidden;
  width:100%;
}

HTML:

<div class="wrapper">
  <div id="semi-circle">test</div>
</div>

difference between width auto and width 100 percent

Width auto

The initial width of a block level element like div or p is auto. This makes it expand to occupy all available horizontal space within its containing block. If it has any horizontal padding or border, the widths of those do not add to the total width of the element.

Width 100%

On the other hand, if you specify width:100%, the element’s total width will be 100% of its containing block plus any horizontal margin, padding and border (unless you’ve used box-sizing:border-box, in which case only margins are added to the 100% to change how its total width is calculated). This may be what you want, but most likely it isn’t.

To visualise the difference see this picture:

Sample Image

Source

CSS: 100% is larger than page width?

The problem is a combination of width and padding properties. Padding, in the typical CSS box model, is additive. If your box width is 100%, the padding applied to it will add to the width. The width would therefore calculate at a number greater than the size set in your width property.

I would suggest using the box-sizing properties in your CSS, like so:

* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

width: 100% + padding: 0 2em, is equal to something greater than 100%. By using the box-sizing property in your style sheet, you will tell the browser to include padding's as part of the total width.

100% DIV width is not really 100%

The 100% value is 100% of the parent's width or the view port. See the documentation.

CSS Width Above 100%