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91 lines
2.4 KiB
91 lines
2.4 KiB
5 years ago
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<!DOCTYPE html>
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<html>
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<head>
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<title>MathJax Dynamic Math Test Page</title>
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<!-- Copyright (c) 2010-2018 The MathJax Consortium -->
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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=edge" />
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<script type="text/javascript" src="../MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
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<style>
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input {margin-top: .7em}
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.output {
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border: 1px solid black;
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padding: 1em;
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width: auto;
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position: absolute; top: 0; left: 2em;
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min-width: 20em;
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}
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.box {position: relative}
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</style>
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</head>
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<body>
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<script>
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//
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// Use a closure to hide the local variables from the
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// global namespace
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//
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(function () {
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var QUEUE = MathJax.Hub.queue; // shorthand for the queue
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var math = null, box = null; // the element jax for the math output, and the box it's in
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//
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// Hide and show the box (so it doesn't flicker as much)
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//
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var HIDEBOX = function () {box.style.visibility = "hidden"}
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var SHOWBOX = function () {box.style.visibility = "visible"}
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//
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// Get the element jax when MathJax has produced it.
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//
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QUEUE.Push(function () {
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math = MathJax.Hub.getAllJax("MathOutput")[0];
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box = document.getElementById("box");
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SHOWBOX(); // box is initially hidden so the braces don't show
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});
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//
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// The onchange event handler that typesets the math entered
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// by the user. Hide the box, then typeset, then show it again
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// so we don't see a flash as the math is cleared and replaced.
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//
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window.UpdateMath = function (TeX) {
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QUEUE.Push(
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HIDEBOX,
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["resetEquationNumbers",MathJax.InputJax.TeX],
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["Text",math,"\\displaystyle{"+TeX+"}"],
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SHOWBOX
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);
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}
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})();
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</script>
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<p>
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Type some \(\rm\TeX\) code and press RETURN:<br />
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<input id="MathInput" size="80" onchange="UpdateMath(this.value)" />
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</p>
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<p>You typed:</p>
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<div class="box" id="box" style="visibility:hidden">
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<div id="MathOutput" class="output">$${}$$</div>
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</div>
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<script>
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//
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// IE doesn't fire onchange events for RETURN, so
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// use onkeypress to do a blur (and refocus) to
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// force the onchange to occur
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//
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if (MathJax.Hub.Browser.isMSIE) {
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MathInput.onkeypress = function () {
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if (window.event && window.event.keyCode === 13) {this.blur(); this.focus()}
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}
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}
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</script>
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</body>
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</html>
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