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CSS identifiers can't begin with a digit or any ASCII character other than - _ a-z or A-Z, so those must be escaped. We could add a refinement to the CSS result box that allows you to generate escapes for identifiers, such as \31 23.
CSS identifiers can't begin with a digit or any ASCII character other than - _ a-z or A-Z, so those must be escaped. We could add a refinement to the CSS result box that allows you to generate escapes for identifiers, such as \31 23.
See https://www.w3.org/International/questions/qa-escapes#css_identifiers
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