invalid emails like "test" return the same result "undefined" like a valid email

[itinance]

Current Behavior

input: "test"
output: "undefined"

input: "valid@gmail.com"
output: undefined

input "test@gmai"
output: undefined

input "test@gmail"
output: {... test@gmail.com}

Is this behaviour intended?

Expected Behavior

input: "test"
output: false

input: "valid@gmail.com"
output: true

input "test@gmai"
output: false

input "test@gmail"
output: {... test@gmail.com}

Steps to Reproduce the Problem

const suggestion = emailSpellChecker.run({
email
})

Environment

• Version: 1.12
• Platform: Mac
• Node.js Version: 20