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How do I escape this ampersand in the source XML? I tried &, but this is decoded as the actual ampersand character (&), which is invalid in HTML. So I want to escape it in such a way that it will be rendered as & in the web page that uses the XML output.
An explanation of when to use encoded ampersands (&) in HTML and Javascript and when not to encode them.
So when automated escapers and descapers do their thing with inputs and outputs, they sometimes screw up and will escape **&**amp; as **&**amp; which causes the next iteration to render as &.
The ampersand is no exception. Here's an example of what is required in order to display the code required to output an ampersand symbol. Note that the amp; bit needs to be included twice. Without including it twice, a single ampersand symbol would rendered and that's all.
What is & is the first place? Because one symbol can mean different things in coding (in general), so there needs to be a way to differentiate one kind from another.
& is the proper way to escape the ampersand in an HTML context...where is your source coming from? and what's the destination? It may be better to do this server-side for example.
Thus both & and & are "valid" from an XML perspective, and in practice it will depend on the specification for the data to be encoded into the XML document.
In HTML5, they are equivalent in that example. Traditionally, in HTML, only & was correct — but as with so many things, web developers blithely ignored this inconvenient rule and wrote bare ampersands everywhere. For their part, browsers just "did the right thing" and interpreted these ampersands as ampersands. HTML5 standardized this behavior, so now & is allowed by itself as long as ...
Encoding & as & under all circumstances, for me, is an easier rule to live by, reducing the likelihood of errors and failures. Compare the following: which is easier? Which is easier to bugger up? Methodology 1 Write some content which includes ampersand characters. Encode them all. Methodology 2 (with a grain of salt, please ;) )
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