v8/test/mjsunit/newline-in-string.js

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// Test multiline string literal.
var str = 'asdf\
\nasdf\
\rasdf\
\tasdf\
\\\
\
';
assertEquals('asdf\nasdf\rasdf\tasdf\\', str);

// Allow escaped CR+LF in multiline string literals.
var code = "'asdf\\" + String.fromCharCode(0xD) + String.fromCharCode(0xA) + "asdf'";
assertEquals("asdfasdf", eval(code));

// Allow individually escaped LF+CR in multiline string literals.
code = "'asdf\\" + String.fromCharCode(0xA) + "\\" + String.fromCharCode(0xD) + "asdf'";
assertEquals("asdfasdf", eval(code));

// Do not allow LF+CR in multiline string literals. (crbug.com/v8/6401)
code = "'asdf\\" + String.fromCharCode(0xA) + String.fromCharCode(0xD) + "asdf'";
assertThrows(code);