tiptap/packages/core/src/utilities/fromString.ts

export default function fromString(value: any): any {
  if (typeof value !== 'string') {
    return value
  }

  if (value.match(/^[+-]?(?:\d*\.)?\d+$/)) {
    return Number(value)
  }

  if (value === 'true') {
    return true
  }

  if (value === 'false') {
    return false
  }

  return value
}