我尽力从 JSXGraph 网站复制此示例： https://jsxgraph.uni-bayreuth.de/wiki/index.php/Using_CSS_styles这是缩写的 HTML：<!doctype html><html><head> <meta charset="utf-8"> <title>Covid Sandbox</title> <meta name="description" content="Covid Sandbox"></head><body> <script src="third party/jquery-3.5.1.min.js"></script> <script type="text/javascript" charset="UTF-8" src="https://cdn.jsdelivr.net/npm/jsxgraph@1.1.0/distrib/jsxgraphcore.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/jsxgraph@1.1.0/distrib/jsxgraph.css" /> <div id="jsxgbox"> </div></body></html><style> .jsxgDefaultFont { font-family: Verdana, Geneva, Tahoma, sans-serif; font-size: 18; } .myFont { font-family: Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif; border: 1px solid black; padding: 5px; border-radius:5px; }</style> <script src="js/test.js"></script>这是我在 test.js 中编写的一些 Javascript 代码：JXG.Options.text.cssClass = 'jsxgDefaultFont';board = JXG.JSXGraph.initBoard('jsxgbox', { boundingbox: [-1,15,15,-1], showcopyright: false, axis: true, renderer: 'canvas', defaultAxes: { x: { strokeColor: 'grey', ticks: { visible: 'inherit', } }, y: { strokeColor: 'grey', ticks: { visible: 'inherit', } }, }, zoom: { factorX: 1.25, factorY: 1.25, wheel: true, needshift: false, eps: 0.1 }, showZoom: false, showNavigation: false,}); var txt = board.create('text', [0,0, " <span id='par'>(</span> Hello world <span id='par'>)</span>"], { cssClass:'myFont', strokeColor:'red', highlightCssClass: 'myFontHigh', fontSize:20 });board.update();内联 HTML 甚至似乎没有被正确解释（显示 span\ Hello World \span）。不确定我在这里做错了什么。
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