How to select by a property?

Thanks for making this package. It does work easily using selectors but I don't understand what's a simple way to select a node by node name and attribute (jQuery style), e.g.

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I tried `parsed.querySelectorAll('meta[property="og:title"]')` but it retuens empty result.

Reproduce the shown meta element and the parsed.querySelectorAll('meta[property="og:title"]') query. Check the package's documented selector support and determine whether the result reflects an unsupported selector or a usage issue. Done means documenting the working node-name-and-attribute lookup, or clearly recording the limitation and expected alternative.

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