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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <script type="text/javascript">
  window.MathJax = {
    jax: ["input/TeX", "output/CommonHTML"],
    extensions: ["tex2jax.js"],
    TeX: {
      equationNumbers: { autoNumber: "AMS" },
      extensions: ["AMSmath.js", "AMSsymbols.js", "noErrors.js", "noUndefined.js"]
    },
    /* The MathJax API provides us with the ability to register
    callbacks on signals broadcast during its startup sequence.
    Documentation:
    http://docs.mathjax.org/en/latest/advanced/signals.html
    https://docs.mathjax.org/en/v1.1-latest/startup.html */
    AuthorInit: function() {
      MathJax.Hub.Register.StartupHook("End Typeset", function() {
        const fullFontSize = 121;
        var renderMath = function() {
          /* All formulae that we want to enable responsive scaling
          for need to be wrapped with `class="mj-formula"` */
          var mjFormulae = document.getElementsByClassName("mj-formula");
          if (mjFormulae) {
            for (var i = 0; i < mjFormulae.length; ++i) {
              var mjFormula = mjFormulae[i];

              /* Retrieve the MathJax element `MathJax_CHTML`. If this element
              has a descendant `mjx-table`, the element is a multi-line equation
              with automatic numbering and its scaling factor has to be calculated
              differently. Note: if your output processor is not `CommonHTML`, I
              suspect these class names may be different */
              var mjElement = mjFormula.getElementsByClassName("MathJax_CHTML")[0];
              var mjTable = mjElement.getElementsByClassName("mjx-table")[0];

              /* If the equation is single-line, the scaling factor is a function
              of `MathJax_CHTML`'s offset width. If it's multi-line, it is a
              function of its descendant `mjx-table` */
              var scale = 0.8 * (mjTable ?
                mjFormula.offsetWidth / mjTable.offsetWidth :
                mjFormula.offsetWidth / mjElement.offsetWidth);

              /* Apply the scaling factor to the old font size, rounded to the
              nearest integer, as long as it does not exceed the max font size */
              const oldFontSize = parseInt(mjElement.style.fontSize);
              var newFontSize = Math.round(Math.min(oldFontSize * scale, fullFontSize));
              mjElement.style.fontSize = `${newFontSize}%`;
            }
          }
        }

        /* `renderMath` needs to be called once on the `End Typeset`
        signal broadcast so the scaling is applied on first load */
        renderMath();

        /* Attach an event handler that calls `renderMath` after a small delay */
        var timeoutId;
        const delay = 250;
        window.addEventListener("resize", function() {
          clearTimeout(timeoutId);
          timeoutId = setTimeout(renderMath, delay);
        });
      });
    }
  };
</script>

<body>
  <div class="container">
    <div class="content">
      <h4>Single-line:</h4>
      <div class="mj-formula">
        $$ (1+x)^n = 1 + nx + \frac{n(n-1)}{2!}x^2 + \frac{n(n-1)(n-2)}{3!}x^3 + \frac{n(n-1)(n-2)(n-3)}{4!}x^4 + \ldots $$
      </div>
      <h4>Numbered multi-line:</h4>
      <div class="mj-formula">
        $$\begin{align}
        (1+x)^n &= 1 + nx + \frac{n(n-1)}{2!}x^2 + \frac{n(n-1)(n-2)}{3!}x^3 + \frac{n(n-1)(n-2)(n-3)}{4!}x^4 + \ldots \\
        (1+x)^n &= 1 + nx + \frac{n(n-1)}{2!}x^2 + \frac{n(n-1)(n-2)}{3!}x^3 + \ldots
        \end{align}$$
      </div>
    </div>
  </div>
</body>

            
          
!
            
              body {
  background: black;
  font-family: "Courier New", sans-serif;
}

.container {
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;

  -ms-flex-align: center;
  -webkit-align-items: center;
  -webkit-box-align: center;

  align-items: center;
  
  height: 100vh;
}

.content {
  background: white;
  text-align: center;
  
  width: 80%;
  margin: 0 auto;

  border-radius: 10px;
  padding: 10px;
}
            
          
!
999px
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