3. Styling an element which contains a specific processing instruction
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## 3. Styling an element which contains a specific processing instruction

Use pseudo-class :contains-processing-instruction(`target`) where `target`, a CSS identifier or string, is the target of the processing instructions.

Example: display all XHTML `span`s containing one or more spreadsheet formulas with a yellow background.

    span:contains-processing-instruction(xxe-formula) {
        background-color: yellow;
    }

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