TS1002: Unterminated string literal.

TS1002

Occurs when there is an unterminated string literal somewhere. String literals must be enclosed by single (') or double (") quotes.

Often, it caused by an attempt to use a string literal over multiple lines:

const str = "Here is some text
  that I want to break
  across multiple lines.";

If you are trying to break a string across multiple lines, you can use template literals using the backtick (`) instead:

const str = `Here is some text
  that I want to break
  across multiple lines.`;

Or you can use string concatenation:

const str = "Here is some text" +
  "that I want to break " +
  "across multiple lines.";

Or you can use a backslash (\) at the end of the line:

const str = "Here is some text \
  that I want to break \
  across multiple lines.";

Related: TS1003