I have a HTML page where a SVG element is created through javascript.
If I use encoded characters in the HTML portion of the page, like µ/m³, it's perfectly rendered as µ/m³
However, when I put the same text inside a SVG text element, the literal µ/m³ text is shown on the page.
The whole page encoding is UTF-8 and both files HTML and javascript are saved with UTF-8 encoding.
Any idea about what can be happening here?
EDIT: I add the full source code of the page once javascript has added the SVG part. The same effect is happening here, the page renders ok the encoded chars just before the svg part, but shows them encoded inside the svg code
<head>
<meta charset="utf-8">
<title>Gráficas de calidad del aire</title>
<link type="text/css" rel="stylesheet" href="../css/main.css">
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<script src="https://d3js.org/d3.v5.min.js"></script>
<script src="../js/airQuality.js" type="text/javascript"></script>
</head><body><div id="menu"><ul><li id="ultima" class="menuEle">Última medición global</li><li id="so2" title="Dióxido de sulfuro" class="menuEle selected">SO2</li><li id="no" title="Óxido de nitrógeno" class="menuEle">NO</li><li id="no2" title="Dióxido de nitrógeno" class="menuEle">NO2</li><li id="co" title="Monóxido de carbono" class="menuEle">CO</li><li id="pm10" title="Partículas en suspensión de menos de 10 micrómetros" class="menuEle">PM10</li><li id="o3" title="Ozono" class="menuEle">O3</li></ul></div>
<div id="mainContainer">µg/m³
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x2="-6"></line><text fill="currentColor" x="-9" dy="0.32em">200</text></g><g class="tick" opacity="1" transform="translate(0,169.78571428571428)"><line stroke="currentColor" x2="-6"></line><text fill="currentColor" x="-9" dy="0.32em">250</text></g><g class="tick" opacity="1" transform="translate(0,87.64285714285717)"><line stroke="currentColor" x2="-6"></line><text fill="currentColor" x="-9" dy="0.32em">300</text></g><g class="tick" opacity="1" transform="translate(0,5.5)"><line stroke="currentColor" x2="-6"></line><text fill="currentColor" x="-9" dy="0.32em">350</text></g></g><g transform="translate(0, 580)" fill="none" font-size="10" font-family="sans-serif" text-anchor="middle"><path class="domain" stroke="currentColor" d="M1000.5,6V0.5H50.5V6"></path><g class="tick" opacity="1" transform="translate(972.0568862275449,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(903.7934131736527,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Wed 13</text></g><g class="tick" opacity="1" transform="translate(835.5299401197605,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(767.2664670658683,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Tue 12</text></g><g class="tick" opacity="1" transform="translate(699.002994011976,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(630.7395209580839,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Mon 11</text></g><g class="tick" opacity="1" transform="translate(562.4760479041917,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(494.2125748502994,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Feb 10</text></g><g class="tick" opacity="1" transform="translate(425.9491017964072,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(357.68562874251495,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Sat 09</text></g><g class="tick" opacity="1" transform="translate(289.42215568862275,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(221.15868263473055,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Fri 08</text></g><g class="tick" opacity="1" transform="translate(152.89520958083833,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">12 PM</text></g><g class="tick" opacity="1" transform="translate(84.6317365269461,0)"><line stroke="currentColor" y2="6"></line><text fill="currentColor" y="9" dy="0.71em">Thu 07</text></g></g><g><text class="verticales" x="-285.89285714285717" y="10" transform="rotate(-90)">&#181;g/m&#179;</text></g><g><path 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</div>
</body>You can use selection.html("µ/m³"). This causes the string to be parsed as XML, and the entities gets replaced by the characters they represent.
I know there is a paragraph in the d3 doc that says
Also, selection.html is only supported on HTML elements. SVG elements and other non-HTML elements do not support the innerHTML property, and thus are incompatible with selection.html.
This seems to be a very old text and is no longer true, unless you want to support browsers like IE<=8 or Opera<=12. For all other browsers this works.