Missing feature: case insensitive regex

When using regex in order to restrict attributes, it seems to be no good way to have the regex case insensitive, i.e i flag.

Use cases

Following code:

input: {
    inherit: 'input',
    attributes: {
        ...html5.input.attributes,
        name: ['/^((?!Name).)*$/'],
    },
},

will only search for the specific term "Name", but i would like to also find "name", "nAme" and so on.