max-width

  • Revision slug: CSS/max-width
  • Revision title: max-width
  • Revision id: 318769
  • Created:
  • Creator: teoli
  • Is current revision? No
  • Comment

Revision Content

{{ CSSRef() }}

Summary

The max-width CSS property is used to set the maximum width of a given element. It prevents the used value of the {{ Cssxref("width") }} property from becoming larger than the value specified for max-width.

{{ Cssxref("max-width") }} overrides {{cssxref("width")}}, but {{ Cssxref("min-width") }} overrides {{ Cssxref("max-width") }}.

  • {{ Xref_cssinitial() }} {{ Cssxref("none") }}
  • Applies to block level and replaced elements
  • {{ Xref_cssinherited() }} no
  • Percentages refer to the width of the containing block
  • Media {{ Xref_cssvisual() }}
  • {{ Xref_csscomputed() }} the percentage as specified or the absolute length or none

Syntax

Formal syntax:  <length> | <percentage> | none | max-content | min-content | fit-content | fill-available
max-width: 3.5em
max-width: 75%
max-width: none
max-width: max-content
max-width: min-content
max-width: fit-content
max-width: fill-available

max-width: inherit

Values

none
The width has no maximum value.
<length>
See {{ Xref_csslength() }} for possible units.
<percentage>
Specified as a {{ Xref_csspercentage() }} of containing block's width.
max-content{{experimental_inline()}}
The intrinsic preferred width.
min-content{{experimental_inline()}}
The intrinsic minimum width.
fill-available{{experimental_inline()}}
The containing block width minus horizontal margin, border and padding. Some browsers implement an ancient name for this keyword, available.
fit-content{{experimental_inline()}}
The same as max-content.

Examples

body  { max-width: 40em; }

table { max-width: 75%; }

form  { max-width: none; }
p { background: gold }

The Mozilla community produces a lot of great software.

p { background: lightgreen;
    max-width:  intrinsic;         /* Safari/WebKit */
    max-width:  -moz-max-content;  /* Firefox/Gecko */
  }

The Mozilla community produces a lot of great software.

p { background: lightblue;  max-width: -moz-min-content; }

The Mozilla community produces a lot of great software.

Specifications

Specification Status Comment
{{ SpecName('CSS3 Sizing', '#width-height-keywords', 'max-width') }} {{ Spec2('CSS3 Sizing') }} Adds the max-content, min-content, fit-content, and fill-available keywords.
Both CSS3 Box and CSS3 Writing Modes drafts defined at some point these keywords. These drafts are superseded by this spec.
{{ SpecName('CSS3 Transitions', '#animatable-css', 'max-width') }} {{ Spec2('CSS3 Transitions') }} Defines max-width as animatable.
{{ SpecName('CSS2.1', 'visudet.html#min-max-heights', 'max-width') }} {{ Spec2('CSS2.1') }} Initial definition.

Browser compatibility

{{ CompatibilityTable() }}

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0 {{CompatGeckoDesktop("1.0")}} 7.0 4.0 2.0.2 (416),
buggy before
applies to <table> [1] {{ CompatNo() }} {{CompatVersionUnknown()}} {{ CompatNo() }} {{CompatVersionUnknown()}} {{ CompatNo() }}
max-content, min-content, fit-content, and fill-available {{ experimental_inline() }} {{ CompatNo() }} [3] {{CompatGeckoDesktop("1.9")}}{{property_prefix("-moz")}} [2] {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }} [3]
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }}

Notes

[1] CSS 2.1 explicitely leaves the behavior of max-width with {{ HTMLElement("table") }} undefined. Therefore any behavior is CSS2.1-compliant; newer CSS specifications may define this behavior, so Web developers shouldn't rely on a specific one now.

[2] Gecko experimentally implements the definitions given in CSS3 Basic Box. This one defines available and not fill-available. Also the definition of fit-content is simpler than in CSS3 Sizing.

[3] WebKit implements an earlier proposal for setting the height to an intrinsic height: the keywords intrinsic, instead of max-content, and min-intrinsic, instead of min-content There is no equivalent for fill-available or fit-content.

See also

  • {{ Cssxref("width") }}, {{ Cssxref("min-width") }}, {{ Cssxref("max-height") }}
  • The box model, {{ Cssxref("box-sizing") }}

Revision Source

<p>{{ CSSRef() }}</p>
<h2 id="Summary">Summary</h2>
<p>The <code>max-width</code> CSS property is used to set the maximum width of a given element. It prevents the used value of the {{ Cssxref("width") }} property from becoming larger than the value specified for <code>max-width</code>.</p>
<p>{{ Cssxref("max-width") }} overrides {{cssxref("width")}}, but {{ Cssxref("min-width") }} overrides {{ Cssxref("max-width") }}.</p>
<ul class="cssprop">
  <li><dfn>{{ Xref_cssinitial() }}</dfn> {{ Cssxref("none") }}</li>
  <li><dfn>Applies to</dfn> block level and replaced elements</li>
  <li><dfn>{{ Xref_cssinherited() }}</dfn> no</li>
  <li><dfn>Percentages</dfn> refer to the width of the containing block</li>
  <li><dfn>Media</dfn> {{ Xref_cssvisual() }}</li>
  <li><dfn>{{ Xref_csscomputed() }}</dfn> the percentage as specified or the absolute length or <code>none</code></li>
</ul>
<h2 id="Syntax">Syntax</h2>
<pre class="twopartsyntaxbox">
Formal syntax:  &lt;length&gt; | &lt;percentage&gt; | none | max-content | min-content | fit-content | fill-available
</pre>
<pre>
max-width: 3.5em
max-width: 75%
max-width: none
max-width: max-content
max-width: min-content
max-width: fit-content
max-width: fill-available

max-width: inherit
</pre>
<h3 id="Values">Values</h3>
<dl>
  <dt>
    <code>none</code></dt>
  <dd>
    The width has no maximum value.</dd>
  <dt>
    <code>&lt;length&gt;</code></dt>
  <dd>
    See {{ Xref_csslength() }} for possible units.</dd>
  <dt>
    <code>&lt;percentage&gt;</code></dt>
  <dd>
    Specified as a {{ Xref_csspercentage() }} of containing block's width.</dd>
  <dt>
    <code>max-content</code>{{experimental_inline()}}</dt>
  <dd>
    The intrinsic preferred width.</dd>
  <dt>
    <code>min-content</code>{{experimental_inline()}}</dt>
  <dd>
    The intrinsic minimum width.</dd>
  <dt>
    <code>fill-available</code>{{experimental_inline()}}</dt>
  <dd>
    The containing block width minus horizontal margin, border and padding. Some browsers implement an ancient name for this keyword, <code>available</code>.</dd>
  <dt>
    <code>fit-content</code>{{experimental_inline()}}</dt>
  <dd>
    The same as <code>max-content.</code></dd>
</dl>
<h2 id="Examples">Examples</h2>
<pre>
body  { max-width: 40em; }

table { max-width: 75%; }

form  { max-width: none; }
</pre>
<pre>
p { background: gold }
</pre>
<p style="background:gold">The Mozilla community produces a lot of great software.</p>
<pre>
p { background: lightgreen;
    max-width:  intrinsic;         /* Safari/WebKit */
    max-width:  -moz-max-content;  /* Firefox/Gecko */
  }
</pre>
<p style="background:lightgreen; max-width:intrinsic; max-width:-moz-max-content">The Mozilla community produces a lot of great software.</p>
<pre>
p { background: lightblue;  max-width: -moz-min-content; }
</pre>
<p style="background:lightblue; max-width:-moz-min-content">The Mozilla community produces a lot of great software.</p>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
  <tbody>
    <tr>
      <th scope="col">Specification</th>
      <th scope="col">Status</th>
      <th scope="col">Comment</th>
    </tr>
    <tr>
      <td>{{ SpecName('CSS3 Sizing', '#width-height-keywords', 'max-width') }}</td>
      <td>{{ Spec2('CSS3 Sizing') }}</td>
      <td>Adds the <code>max-content</code>, <code>min-content</code>, <code>fit-content</code>, and <code>fill-available</code> keywords.<br />
        <em>Both CSS3 Box and CSS3 Writing Modes drafts defined at some point these keywords. These drafts are superseded by this spec.</em></td>
    </tr>
    <tr>
      <td>{{ SpecName('CSS3 Transitions', '#animatable-css', 'max-width') }}</td>
      <td>{{ Spec2('CSS3 Transitions') }}</td>
      <td>Defines <code>max-width</code> as animatable.</td>
    </tr>
    <tr>
      <td>{{ SpecName('CSS2.1', 'visudet.html#min-max-heights', 'max-width') }}</td>
      <td>{{ Spec2('CSS2.1') }}</td>
      <td>Initial definition.</td>
    </tr>
  </tbody>
</table>
<h2 id="Browser_Compatibility" name="Browser_Compatibility">Browser compatibility</h2>
<p>{{ CompatibilityTable() }}</p>
<div id="compat-desktop">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Chrome</th>
        <th>Firefox (Gecko)</th>
        <th>Internet Explorer</th>
        <th>Opera</th>
        <th>Safari (WebKit)</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>1.0</td>
        <td>{{CompatGeckoDesktop("1.0")}}</td>
        <td>7.0</td>
        <td>4.0</td>
        <td>2.0.2 (416),<br />
          buggy before</td>
      </tr>
      <tr>
        <td>applies to <code>&lt;table&gt; </code>[1]</td>
        <td>{{ CompatNo() }}</td>
        <td>{{CompatVersionUnknown()}}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{CompatVersionUnknown()}}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
      <tr>
        <td rowspan="1"><code>max-content</code>, <code>min-content</code>, <code>fit-content</code>, and <code>fill-</code><code>available</code> {{ experimental_inline() }}</td>
        <td>{{ CompatNo() }} [3]</td>
        <td>{{CompatGeckoDesktop("1.9")}}{{property_prefix("-moz")}} [2]</td>
        <td rowspan="1">{{ CompatNo() }}</td>
        <td rowspan="1">{{ CompatNo() }}</td>
        <td>{{ CompatNo() }} [3]</td>
      </tr>
    </tbody>
  </table>
</div>
<div id="compat-mobile">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Android</th>
        <th>Firefox Mobile (Gecko)</th>
        <th>IE Phone</th>
        <th>Opera Mobile</th>
        <th>Safari Mobile</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>{{ CompatUnknown() }}</td>
        <td>{{ CompatUnknown() }}</td>
        <td>{{ CompatUnknown() }}</td>
        <td>{{ CompatUnknown() }}</td>
        <td>{{ CompatUnknown() }}</td>
      </tr>
    </tbody>
  </table>
</div>
<h3 id="Notes">Notes</h3>
<p>[1] CSS 2.1 explicitely leaves the behavior of <code>max-width</code> with {{ HTMLElement("table") }} undefined. Therefore any behavior is CSS2.1-compliant; newer CSS specifications may define this behavior, so Web developers shouldn't rely on a specific one now.</p>
<p>[2] Gecko experimentally implements the definitions given in CSS3 Basic Box. This one defines <code>available</code> and not <code>fill-available</code>. Also the definition of <code>fit-content</code> is simpler than in CSS3 Sizing.</p>
<p>[3] WebKit implements an earlier proposal for setting the height to an intrinsic height: the keywords <code>intrinsic</code>, instead of <code>max-content</code>, and <code>min-intrinsic</code>, instead of <code>min-content</code> There is no equivalent for <code>fill-available</code> or <code>fit-content</code>.</p>
<h2 id="See_also">See also</h2>
<ul>
  <li>{{ Cssxref("width") }}, {{ Cssxref("min-width") }}, {{ Cssxref("max-height") }}</li>
  <li><a href="/en/CSS/box_model" title="en/CSS/box_model">The box model</a>, {{ Cssxref("box-sizing") }}</li>
</ul>
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