Options
inputPattern
Limits simple-keyboard’s input to a certain regular expression. This means that if a key doesn’t match the regex, it will be ignored.
// Applies to all internal inputs
inputPattern: /^\d+$/
// Use an expression for a specific input, in case you are using the "inputName" option
inputPattern: {
'default': /^\d+$/,
'myFancyInput': /^[a-zA-Z]+$/
}