sample-dynamic-steps.html
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<!DOCTYPE html>
<html>
<head>
<title>MathJax Dynamic Steps Test Page</title>
<!-- Copyright (c) 2011-2017 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>