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import { FormControl } from '@angular/forms'
export function validateHost (c: FormControl) {
// Thanks to http://stackoverflow.com/a/106223
const HOST_REGEXP = new RegExp(
'^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$'
)
return HOST_REGEXP.test(c.value) ? null : {
validateHost: {
valid: false
}
}
}
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