This file is indexed.

/usr/share/doc/libjs-mathjax-doc/html/options/extensions/fast-preview.html is in libjs-mathjax-doc 2.7+20171212-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
  <meta charset="utf-8">
  
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  
  <title>The fast-preview extension &mdash; MathJax 2.7 documentation</title>
  

  
  
  
  

  

  
  
    

  

  
  
    <link rel="stylesheet" href="../../_static/css/theme.css" type="text/css" />
  

  

  
        <link rel="index" title="Index"
              href="../../genindex.html"/>
        <link rel="search" title="Search" href="../../search.html"/>
    <link rel="top" title="MathJax 2.7 documentation" href="../../index.html"/>
        <link rel="up" title="Extension options" href="index.html"/>
        <link rel="next" title="The Content MathML extension" href="Content-MathML.html"/>
        <link rel="prev" title="The AssistiveMML.js extension" href="assistive-mml.html"/> 

  
  <script src="../../_static/js/modernizr.min.js"></script>

</head>

<body class="wy-body-for-nav" role="document">

   
  <div class="wy-grid-for-nav">

    
    <nav data-toggle="wy-nav-shift" class="wy-nav-side">
      <div class="wy-side-scroll">
        <div class="wy-side-nav-search">
          

          
            <a href="../../index.html" class="icon icon-home"> MathJax
          

          
          </a>

          
            
            
              <div class="version">
                2.7
              </div>
            
          

          
<div role="search">
  <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get">
    <input type="text" name="q" placeholder="Search docs" />
    <input type="hidden" name="check_keywords" value="yes" />
    <input type="hidden" name="area" value="default" />
  </form>
</div>

          
        </div>

        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
          
            
            
              
            
            
              <p class="caption"><span class="caption-text">Basic Usage</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../mathjax.html">What is MathJax?</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../start.html">Getting Started with MathJax</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../installation.html">Installing and Testing MathJax</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../configuration.html">Loading and Configuring MathJax</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../config-files.html">Combined MathJax Configurations</a></li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../tex.html">MathJax TeX and LaTeX Support</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../mathml.html">MathJax MathML Support</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../asciimath.html">MathJax AsciiMath Support</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../output.html">MathJax Output Formats</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../font-support.html">MathJax Font Support</a></li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../localization.html">MathJax Localization</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../safe-mode.html">MathJax Safe-mode</a></li>
</ul>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../community.html">The MathJax Community</a></li>
</ul>
<p class="caption"><span class="caption-text">Configuration options</span></p>
<ul class="current">
<li class="toctree-l1 current"><a class="reference internal" href="../index.html">Configuration options</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="../hub.html">The core options</a></li>
<li class="toctree-l2"><a class="reference internal" href="../preprocessors/index.html">Preprocessor options</a></li>
<li class="toctree-l2"><a class="reference internal" href="../input-processors/index.html">Input processor options</a></li>
<li class="toctree-l2"><a class="reference internal" href="../output-processors/index.html">Output processor options</a></li>
<li class="toctree-l2 current"><a class="reference internal" href="index.html">Extension options</a><ul class="current">
<li class="toctree-l3"><a class="reference internal" href="a11y-extensions.html">The Accessibility Extensions options</a></li>
<li class="toctree-l3"><a class="reference internal" href="assistive-mml.html">The AssistiveMML options</a></li>
<li class="toctree-l3 current"><a class="current reference internal" href="#">The fast-preview options</a></li>
<li class="toctree-l3"><a class="reference internal" href="Content-MathML.html">The Content MathML options</a></li>
<li class="toctree-l3"><a class="reference internal" href="handle-floats.html">The HTML-CSS floats extension</a></li>
<li class="toctree-l3"><a class="reference internal" href="MML3.html">The experimental MML3 extension</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHTML-preview.html">The CHTML-preview options [Deprecated]</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../other/index.html">Other options</a></li>
<li class="toctree-l2"><a class="reference internal" href="../ThirdParty.html">Third-party extensions</a></li>
</ul>
</li>
</ul>
<p class="caption"><span class="caption-text">Advanced topics</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/model.html">The MathJax Processing Model</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/startup.html">The MathJax Startup Sequence</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/synchronize.html">Synchronizing Your Code with MathJax</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/dynamic.html">Loading MathJax Dynamically</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/typeset.html">Modifying Math on the Page</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/toMathML.html">Obtaining the MathML for an Expression</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/extension-writing.html">Writing MathJax Extensions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/debugging-tips.html">Debugging Tips</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../advanced/mathjax-node.html">MathJax on NodeJS</a></li>
</ul>
<p class="caption"><span class="caption-text">The MathJax API</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../api/index.html">Details of the MathJax API</a></li>
</ul>
<p class="caption"><span class="caption-text">Miscellanea</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../misc/accessibility-features.html">Accessibility features</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/browser-compatibility.html">Browser Compatibility</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/epub.html">EPUB3 Reading Systems</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/badges.html">MathJax Badges and Logo</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/articles.html">Articles and Presentations</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/platforms.html">Using MathJax in Web Platforms</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/faq.html">MathJax FAQ</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../misc/mathjax-in-use.html">MathJax in Use</a></li>
</ul>
<p class="caption"><span class="caption-text">Upgrading MathJax</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../upgrading/index.html">Upgrading MathJax</a></li>
</ul>
<p class="caption"><span class="caption-text">Reference Pages</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../reference/HTML-snippets.html">HTML snippets</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../reference/CSS-styles.html">CSS style objects</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../reference/localization-strings.html">Localization strings</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../reference/glossary.html">Glossary</a></li>
</ul>

            
          
        </div>
      </div>
    </nav>

    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">

      
      <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
        
          <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
          <a href="../../index.html">MathJax</a>
        
      </nav>


      
      <div class="wy-nav-content">
        <div class="rst-content">
          















<div role="navigation" aria-label="breadcrumbs navigation">

  <ul class="wy-breadcrumbs">
    
      <li><a href="../../index.html">Docs</a> &raquo;</li>
        
          <li><a href="../index.html">Configuration Objects</a> &raquo;</li>
        
          <li><a href="index.html">Extension options</a> &raquo;</li>
        
      <li>The fast-preview extension</li>
    
    
      <li class="wy-breadcrumbs-aside">
        
            
            <a href="../../_sources/options/extensions/fast-preview.rst.txt" rel="nofollow"> View page source</a>
          
        
      </li>
    
  </ul>

  
  <hr/>
</div>
          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
           <div itemprop="articleBody">
            
  <div class="section" id="the-fast-preview-extension">
<span id="configure-fast-preview"></span><h1>The fast-preview extension<a class="headerlink" href="#the-fast-preview-extension" title="Permalink to this headline"></a></h1>
<p>The options below control the operation of the <cite>fast-preview</cite>
extension that is run when you include <code class="docutils literal"><span class="pre">&quot;fast-preview.js&quot;</span></code> in the
<cite>extensions</cite> array of your configuration.  They are listed with their
default values.  To set any of these options, include a
<code class="docutils literal"><span class="pre">fast-preview</span></code> section in your <code class="xref py py-meth docutils literal"><span class="pre">MathJax.Hub.Config()</span></code> call.
For example</p>
<div class="highlight-javascript"><div class="highlight"><pre><span></span><span class="nx">MathJax</span><span class="p">.</span><span class="nx">Hub</span><span class="p">.</span><span class="nx">Config</span><span class="p">({</span>
  <span class="s2">&quot;fast-preview&quot;</span><span class="o">:</span> <span class="p">{</span>
    <span class="nx">Chunks</span><span class="o">:</span> <span class="p">{</span><span class="nx">EqnChunk</span><span class="o">:</span> <span class="mi">10000</span><span class="p">,</span> <span class="nx">EqnChunkFactor</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span> <span class="nx">EqnChunkDelay</span><span class="o">:</span> <span class="mi">0</span><span class="p">},</span>
    <span class="nx">color</span><span class="o">:</span> <span class="s2">&quot;inherit!important&quot;</span><span class="p">,</span>
    <span class="nx">updateTime</span><span class="o">:</span> <span class="mi">30</span><span class="p">,</span> <span class="nx">updateDelay</span><span class="o">:</span> <span class="mi">6</span><span class="p">,</span>
    <span class="nx">messageStyle</span><span class="o">:</span> <span class="s2">&quot;none&quot;</span><span class="p">,</span>
    <span class="nx">disabled</span><span class="o">:</span> <span class="kc">false</span>
  <span class="p">}</span>
<span class="p">});</span>
</pre></div>
</div>
<p>would ask for the PreviewHTML output to run as a preview (<cite>disabled: false</cite>),
force inheritance of the surrounding text color, and set the <cite>updateTime</cite> and
<cite>updateDelay</cite> to  low values (30ms / 6ms) to speed up
the preview pass. Furthermore, it configures the second pass to set the
chunking (<cite>Chunks</cite>) to a reflow every 10,000 equations and disables the
progress messages (<cite>messageStyle</cite>).</p>
<p>This extension provides a two-pass rendering mode. A <strong>first</strong>, fast-but-rough
rendering is genereated as a preview, using the
<a class="reference internal" href="../output-processors/PreviewHTML.html#configure-previewhtml"><span class="std std-ref">The PreviewHTML output processor</span></a>, then a <strong>second</strong> pass using the
configured output jax runs to update the preview output.</p>
<p>This two-pass mode will provide the reader with a quick, decent rendering to
start reading immediately, while silently updating that rendering with the
high quality layout later.</p>
<dl class="describe">
<dt>
<code class="descname">EqnChunk: 10000</code></dt>
<dt>
<code class="descname">EqnChunkFactor: 1</code></dt>
<dt>
<code class="descname">EqnChunkDelay: 0</code></dt>
<dd><p>These values control how “chunky” the <strong>second</strong> pass will be. For more
information see <a class="reference internal" href="../output-processors/HTML-CSS.html#configure-html-css"><span class="std std-ref">The HTML-CSS output processor</span></a> and <a class="reference internal" href="../output-processors/SVG.html#configure-svg"><span class="std std-ref">The SVG output processor</span></a>.</p>
</dd></dl>

<dl class="describe">
<dt>
<code class="descname">color: &quot;inherit!important&quot;</code></dt>
<dd><p>This value allows you to choose a text color for the <strong>first</strong> passs.</p>
</dd></dl>

<dl class="describe">
<dt>
<code class="descname">updateTime: 30</code></dt>
<dt>
<code class="descname">updateDelay: 6</code></dt>
<dd><p>These values control how often the <strong>second</strong> pass will pause to allow user
interaction (e.g., scrolling).</p>
</dd></dl>

<dl class="describe">
<dt>
<code class="descname">messageStyle: &quot;none&quot;</code></dt>
<dd><p>This value controls the verbosity of the processing messages during the
the <strong>second</strong> pass; see <a class="reference internal" href="../hub.html#configure-hub"><span class="std std-ref">The Core Configuration Options</span></a> for more information.</p>
</dd></dl>

<dl class="describe">
<dt>
<code class="descname">disabled:false</code></dt>
<dd><p>This value enables or disables the preview mode. In particular,
it allows overriding a combined configuration file, cf.
<a class="reference internal" href="../../config-files.html#common-configurations"><span class="std std-ref">Combined Configurations</span></a>. The user can independently enable or disable
the fast preview via the MathJax Menu.</p>
</dd></dl>

</div>


           </div>
           <div class="articleComments">
            
           </div>
          </div>
          <footer>
  
    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
      
        <a href="Content-MathML.html" class="btn btn-neutral float-right" title="The Content MathML extension" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
      
      
        <a href="assistive-mml.html" class="btn btn-neutral" title="The AssistiveMML.js extension" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
      
    </div>
  

  <hr/>

  <div role="contentinfo">
    <p>
        &copy; Copyright 2017 The MathJax Consortium.

    </p>
  </div>
  Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. 

</footer>

        </div>
      </div>

    </section>

  </div>
  


  

    <script type="text/javascript">
        var DOCUMENTATION_OPTIONS = {
            URL_ROOT:'../../',
            VERSION:'2.7',
            COLLAPSE_INDEX:false,
            FILE_SUFFIX:'.html',
            HAS_SOURCE:  true,
            SOURCELINK_SUFFIX: '.txt'
        };
    </script>
      <script type="text/javascript" src="../../_static/jquery.js"></script>
      <script type="text/javascript" src="../../_static/underscore.js"></script>
      <script type="text/javascript" src="../../_static/doctools.js"></script>

  

  
  
    <script type="text/javascript" src="../../_static/js/theme.js"></script>
  

  
  
  <script type="text/javascript">
      jQuery(function () {
          SphinxRtdTheme.StickyNav.enable();
      });
  </script>
   

</body>
</html>