This JavaScript error unterminated string literal occurs if there is string which is not terminated properly. String literals must be enclosed by single (‘) or double (“) quotes.
Message:
SyntaxError: Unterminated string constant (Edge) SyntaxError: unterminated string literal (Firefox)
Error Type:
SyntaxError
What happened?
There is a string in the code which is not terminated. String literals needs to be enclosed by single (‘) or double (“) quotes. JavaScript sees no difference between single-quoted strings and double-quoted strings.
Example 1: In this example, the single quotes are used and the string is not terminated, So the error has occurred.
<!DOCTYPE html> < html > < head > < title >Syntax Error</ title > </ head > < body > < script > var GFG_str = 'This is GeeksForGeeks'; document.write(GFG_str); </ script > </ body > </ html > |
Output(In console):
SyntaxError: Unterminated string constant
Example 2: In this example, the double quotes are used and the string is not terminated, So the error has occurred.
<!DOCTYPE html> < html > < head > < title >Syntax Error</ title > </ head > < body > < script > var GFG_str = "This is GeeksForGeeks"; document.write(GFG_str); </ script > </ body > </ html > |
Output(In console):
SyntaxError: Unterminated string constant