121 lines
3.5 KiB
HTML
121 lines
3.5 KiB
HTML
<html>
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<head>
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<title>MathJax Signals Test Page</title>
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<!-- Copyright (c) 2010 Design Science, Inc. -->
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" >
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<!--
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| This example shows how to use MathJax's signal mechanism to find out
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| about what MathJax is doing, and to hook into various events as they
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| occur.
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-->
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<script src="../MathJax.js">
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//
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// Configure MathJax
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//
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MathJax.Hub.Config({
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extensions: ["tex2jax.js"],
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jax: ["input/TeX","output/HTML-CSS"],
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tex2jax: {inlineMath: [["$","$"],["\\(","\\)"]]}
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});
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//
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// Display a message that we are in the configuration code
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// (The Message function is not yet defined when this code
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// runs, so we can't use that here. Post a signal
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// of our own, so it will be displayed along with all
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// the other signals).
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//
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MathJax.Hub.Startup.signal.Post("*** In Startup Configuration code ***");
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//
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// When the "onLoad" message is posted, display a message.
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// (Since this hook is registered before the ones in the main body
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// below, it runs before the code to print the "Startup: onLoad"
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// message, so this message shows up first in the output.)
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//
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MathJax.Hub.Register.StartupHook("onLoad",function () {
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Message("*** The onLoad handler has run, page is ready to process ***");
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});
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//
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// This will be performed after MathJax has completed its
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// setup and typesetting run, which have already been
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// pushed onto the queue.
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// (Since the Message function isn't defined yet when this code
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// runs, we need to enclose it in a function so it will be
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// looked up later when it is defined.)
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//
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MathJax.Hub.Queue(function () {Message("*** MathJax is done ***")});
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</script>
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<style>
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.output {
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background-color: #F0F0F0;
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border-top: 1px solid;
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border-bottom: 1px solid;
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padding: 3px 1em;
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}
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</style>
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</head>
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<body>
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When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are
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$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
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Messages about mathematics:
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<pre id="MathMessages" class="output">
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</pre>
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All Messages:
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<pre id="AllMessages" class="output">
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</pre>
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<script>
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(function () {
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//
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// The output areas
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//
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var math = document.getElementById("MathMessages");
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var all = document.getElementById("AllMessages");
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//
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// A function to display messages in the "AllMessages" area.
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// We make it global so it can be used in the startup code above.
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//
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window.Message = function (message) {
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MathJax.HTML.addText(all,message);
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MathJax.HTML.addElement(all,"br");
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};
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//
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// Find out about "New Math" messages from the Hub and display them.
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// (Look up the TeX code for each new math element)
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//
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MathJax.Hub.Register.MessageHook("New Math",function (message) {
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var script = MathJax.Hub.getJaxFor(message[1]).SourceElement();
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MathJax.HTML.addText(math,message.join(" ")+": '"+script.text+"'");
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MathJax.HTML.addElement(math,"br");
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});
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//
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// Find out about ALL startup and hub messages
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//
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MathJax.Hub.Startup.signal.Interest(function (message) {Message("Startup: "+message)});
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MathJax.Hub.signal.Interest(function (message) {Message("Hub: "+message)});
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//
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// Since signals are remembered, registering an interest will cause
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// use to receive all the past signals as well as new ones.
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// This marks the point were the above routines were called.
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//
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Message("##### events above this have already occurred #####");
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})();
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</script>
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</body>
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</html>
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