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Check
type
of each variabletypeof string1 === typeof string2
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Check
length
of each stringstring1.length === string2.length
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Loop through each character:
[...string1].every((char,i) => char === string2[i] || console.info(`Unequal character at ${i}`))
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Check unicode of each character:
console.log([...string1].map((char,i) => [char, char.codePointAt(0),string2.codePointAt(i)]))