3 Specify lowercase or uppercase for keywords values.
11 This rule ignores [`<custom-idents>`](https://developer.mozilla.org/en/docs/Web/CSS/custom-ident) of known properties. Values which are paired with non-properties (e.g. `$vars` and custom properties), and do not conform to the primary option, can be ignored using the `ignoreValues: []` secondary option.
15 `string`: `"lower"|"upper"`
19 The following patterns are considered violations:
41 transition: -WEBKIT-TRANSFORM 2s;
45 The following patterns are *not* considered violations:
55 transition: -webkit-transform 2s;
61 The following patterns are considered violations:
83 transition: -webkit-transform 2s;
87 The following patterns are *not* considered violations:
97 transition: -WEBKIT-TRANSFORM 2s;
101 ## Optional secondary options
103 ### `ignoreKeywords: ["/regex/", "non-regex"]`
105 Ignore case of keywords values.
107 For example, with `"lower"`.
112 ["Block", "/^(f|F)lex$/"]
115 The following patterns are considered violations:
141 The following patterns are *not* considered violations:
167 ### `ignoreProperties: ["/regex/", "non-regex"]`
169 Ignore case of the values of the listed properties.
171 For example, with `"lower"`.
174 ["/^(b|B)ackground$/", "display"]
177 The following patterns are considered violations:
191 The following patterns are *not* considered violations:
225 Background: deepPink;