This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can Firefox calculate rendering width *after* automatic word wrap?

  • 6 replies
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

more options

When rendering (first attachment) <div plaque><div><h1>Ensemble Subcommands</h1></div></div> Firefox correctly replaces the space with a linebreak, but it does NOT recalculate the width of the H1 element

I expect the final rendering to resemble this (second attachment) <div plaque><div><h1>Ensemble<br>Subcommands</h1></div></div> but it doesn't.

When rendering (first attachment) &lt;div plaque&gt;&lt;div&gt;&lt;h1&gt;Ensemble Subcommands&lt;/h1&gt;&lt;/div&gt;&lt;/div&gt; Firefox correctly replaces the space with a linebreak, but it does NOT recalculate the width of the H1 element I expect the final rendering to resemble this (second attachment) &lt;div plaque&gt;&lt;div&gt;&lt;h1&gt;Ensemble&lt;br&gt;Subcommands&lt;/h1&gt;&lt;/div&gt;&lt;/div&gt; but it doesn't.
Attached screenshots

Modified by cor-el

All Replies (6)

more options

Sorry, my HTML snippets were taken as active code. Here they are again: <div plaque><div><h1>Ensemble Subcommands</h1></div></div>

<div plaque><div><h1>Ensemble<br/>Subcommands</h1></div></div>

more options

Hi, do you have a URL for the page

more options

No link, but this reproduces the behavior -- note: the role of display flex:

 <style>
   html { background: black; }
   body {
     background: white;
     font-family: "Lucinda Sans", LucindaSans, sans-serif;
     margin: 0 auto;
     max-width: 33.88cm;
   }
   div.slide { border: 0.75pt dashed black;
     height: 540pt; width: 960pt; }
   div.plaque {              display: flex;            }
   div.plaque > div { padding: 0 2cm; }
   div.plaque h1 { font-size: 72pt; }
 </style>
 <div class=slide>
   <div class=plaque>
     <div style="background: red;">
       <h1>Ensemble Subcommands</h1></div></div></div>
 <div class=slide>
   <div class=plaque>
     <div style="background: green;">
       <h1>Ensemble<br/>Subcommands</h1></div></div></div>
more options

Maybe someone else will know. Upload your pages here and see what it thinks about the code.

As to somethings you have to find a moz hack to get it to do what you want.

more options

https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing/Introduction

You may need to make a account, not sure if costs as try for free if you have pages uploaded so can test by OS and by browser https://www.browserling.com/

Free http://browsershots.org/

more options

Data URI with above posted code:

data:text/html;charset=utf-8;base64,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