Error when using some Ternary Operators code

[calebeaires]

On a Nativescript xml coding, when using Ternary Operators with < I got the error above, but not when using something like that !=:

XML formatting failed: at line 13, column 76: expected exclamation mark, question mark or alphabetic tag name.

<StackLayout>
    <Label text="label with just < " visibility="{{ p.status < 1 ? 'visible' : 'collapsed' }}"  />
    <Label text="labe with != " visibility="{{ p.status != 1 ? 'visible' : 'collapsed' }}" />
</StackLayout>

[DotJoshJohnson]

Per the RFC for the XML standard, the less than character cannot be used in an attribute value. It would need to be encoded as < first. Because of this, most XML parsers will take issue with your XML.

With the above said, my extension would not throw the error you mentioned as I do not rely on a parser to format the document (it is, for better or worse, done "manually"). If you attempt to format the above XML with the XML Tools extension, you'll get the following:

<StackLayout>
    <Label text="label with just < " visibility="{{ p.status 
        < 1 ? 'visible' : 'collapsed' }}" />
        <Label text="labe with != " visibility="{{ p.status != 1 ? 'visible' : 'collapsed' }}" />
    </StackLayout>

Still not pretty, but it is behaving as expected given the less than character is not encoded properly.

In your case, I think you may have another XML extension installed that overrides the format command. The XML Formatter extension is another popular XML extension and I believe it uses a parser to format the document, which could throw this error.

At any rate, I will treat this as an enhancement and evaluate the possibility of introducing a setting that makes the formatter a bit more lenient here. I'm not sure of the effort required, but I promise I'll look into it!

[DotJoshJohnson]

This will be included in v2.x.

[DotJoshJohnson]

Released in v2.0.0-preview.1. This will be released to the marketplace when v2.0.0 is out of preview.