<!DOCTYPE html> <html> <head> <title>MathJax Dynamic Steps Test Page</title> <!– Copyright © 2011-2018 The MathJax Consortium –> <meta http-equiv=“Content-Type” content=“text/html; charset=UTF-8” /> <meta http-equiv=“X-UA-Compatible” content=“IE=edge” /> <meta name=“viewport” content=“width=device-width, initial-scale=1”>

<script type=“text/x-mathjax-config”>

//
//  Make displayed equations be aligned left and indented
//
MathJax.Hub.Config({
  displayAlign: "left",
  displayIndent: "2em"
});
//
//  Enable the step button after the equation is typeset
//
MathJax.Hub.Queue(function () {
  document.getElementById("step").disabled = false;
});

</script> <script type=“text/javascript” src=“../MathJax.js?config=TeX-AMS_HTML-full”></script>

<script type=“text/javascript”> // // Use a closure to hide the local variable // (function () {

var n = 1;

//
//  Make the current step be visible, and increment the step.
//  If it is the last step, disable the step button.
//  Once a step is taken, the reset button is made available.
//
window.ShowStep = function () {
  document.getElementById("Step"+n).style.visibility = "visible"; n++;
  if (!document.getElementById("Step"+n)) {document.getElementById("step").disabled = true}
  document.getElementById("reset").disabled = false;
}

//
//  Enable the step button and disable the reset button.
//  Hide the steps.
//
window.ResetSteps = function () {
  document.getElementById("step").disabled = false;
  document.getElementById("reset").disabled = true;
  var i = 1, step; n = 1;
  while (step = document.getElementById("Step"+i)) {step.style.visibility = "hidden"; i++}
}

})(); </script>

<style> /*

*  Start with the steps being hidden
*/

#Step1, #Step2, #Step3, #Step4, #Step5 {

visibility: hidden;

}

h1 {

background: #CCCCCC;
padding: .2em 1em;
border-top: 3px solid #666666;
border-bottom: 3px solid #999999;

} </style>

</head> <body>

<h1>Dynamic Equations in MathJax</h1>

<blockquote> <p> Expand the following: begin{align}

(x+1)^2
  &\cssId{Step1}{= (x+1)(x+1)}\\
  &\cssId{Step2}{= x(x+1) + 1(x+1)}\\
  &\cssId{Step3}{= (x^2+x) + (x+1)}\\
  &\cssId{Step4}{= x^2 + (x + x) + 1}\\
  &\cssId{Step5}{= x^2+2x+1}\\

end{align} </p>

<input type=“button” onclick=“ShowStep()” value=“Show Next Step” id=“step” disabled=“true” /> <input type=“button” onclick=“ResetSteps()” value=“Reset” id=“reset” disabled=“true” /> </blockquote>

</body> </html>