The difference between str [0] and str.charAt (0)

Question

What is the difference between str[0]and str.charAt(0)? I always access a specific character by simply typing str[i]where iis the index of the character I want to access (counted from 0), but last week I had a good overview of open source JS code and in every single project I seen, people use the method charAt.

Is there a difference between the two?

Answer 1

[] - A more primitive way to access all types of arrays.

charAt() refers to strings.

[], charAt() .

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charAt(), , undefined IE7

, , charAt() undefined, ""

Answer 2

""[-4]          // undefined

"".charAt(-4)   // ""

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