String API: string.endsWith()

str.endsWith(searchString) determines whether str ends with searchString

the 1st parameter the string to search for

• can be a character
• can be a string
• can contain unicode characters
• a regular expression throws a TypeError

the 2nd parameter, the position where the search ends (as if the string was only that long)

• find "el" at a substring of the length 2
• undefined uses the entire string
• the parameter gets coerced to an integer (e.g. "5" becomes 5)

value less than 0

• returns true, when searching for an empty string
• return false, when searching for a non-empty string

this functionality can be used on non-strings too

• e.g. a boolean
• e.g. a number
• also using the position works

Links

spec The official specification, actually quite good to read for this function.
mdn docs The Mozilla Developer Network docs, contains some examples.