Make element not affected by CSS rules

My google chrome extension needs to wrap content of certain elements on page user is browsing into custom element, say, <xelem>original content</xelem>. This change should not make any visible effect.

Is it possible to make <xelem> NOT affected by * css rules (or any other rules that might apply to it), b开发者_开发问答ut at the same time retain inherited styles?

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Considering you are working with css3, have a look at the :not pseudo-class.

Something like

:not(xelem) {
    /* ... */
}

should work...