pattern property
Implementation
static final RegExp pattern = RegExp(
r'^\s*((?:-?\d+(?:\.\d+)?|-?\.\d+)(?:\%|\w+)?)?'
r'\s*(dotted|dashed|solid|double|groove|ridge|inset|outset|none|hidden)'
r'(?:\s+(rgba?\(.*?\)|\#[0-9a-f]{3,8}|\w{3,}))?\s*$',
multiLine: false,
caseSensitive: false);