47. [ SyntaxError: missing name after . operator ](/en-US/docs/Web/JavaScript/Reference/Errors/Missing_name_after_dot_operator)
48. [ SyntaxError: missing variable name ](/en-US/docs/Web/JavaScript/Reference/Errors/No_variable_name)
49. [ SyntaxError: private fields can't be deleted ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_delete_private_fields)
50. [ SyntaxError: redeclaration of formal parameter "x" ](/en-US/docs/Web/JavaScript/Reference/Errors/Redeclared_parameter)
51. [ SyntaxError: return not in function ](/en-US/docs/Web/JavaScript/Reference/Errors/Bad_return)
52. [ SyntaxError: test for equality (==) mistyped as assignment (=)? ](/en-US/docs/Web/JavaScript/Reference/Errors/Equal_as_assign)
53. [ SyntaxError: Unexpected '#' used outside of class body ](/en-US/docs/Web/JavaScript/Reference/Errors/Hash_outside_class)
54. [ SyntaxError: Unexpected token ](/en-US/docs/Web/JavaScript/Reference/Errors/Unexpected_token)
55. [ SyntaxError: unlabeled break must be inside loop or switch ](/en-US/docs/Web/JavaScript/Reference/Errors/Bad_break)
56. [ SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**' ](/en-US/docs/Web/JavaScript/Reference/Errors/Unparenthesized_unary_expr_lhs_exponentiation)
57. [ SyntaxError: unterminated string literal ](/en-US/docs/Web/JavaScript/Reference/Errors/Unterminated_string_literal)
58. [ SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead ](/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_source_map_pragma)
59. [ TypeError: 'x' is not iterable ](/en-US/docs/Web/JavaScript/Reference/Errors/is_not_iterable)
60. [ TypeError: "x" has no properties ](/en-US/docs/Web/JavaScript/Reference/Errors/No_properties)
61. [ TypeError: "x" is (not) "y" ](/en-US/docs/Web/JavaScript/Reference/Errors/Unexpected_type)
62. [ TypeError: "x" is not a constructor ](/en-US/docs/Web/JavaScript/Reference/Errors/Not_a_constructor)
63. [ TypeError: "x" is not a function ](/en-US/docs/Web/JavaScript/Reference/Errors/Not_a_function)
64. [ TypeError: "x" is not a non-null object ](/en-US/docs/Web/JavaScript/Reference/Errors/No_non-null_object)
65. [ TypeError: "x" is read-only ](/en-US/docs/Web/JavaScript/Reference/Errors/Read-only)
66. [ TypeError: can't assign to property "x" on "y": not an object ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_assign_to_property)
67. [ TypeError: can't convert BigInt to number ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_convert_BigInt_to_number)
68. [ TypeError: can't convert x to BigInt ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_convert_x_to_BigInt)
69. [ TypeError: can't define property "x": "obj" is not extensible ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_define_property_object_not_extensible)
70. [ TypeError: can't delete non-configurable array element ](/en-US/docs/Web/JavaScript/Reference/Errors/Non_configurable_array_element)
71. [ TypeError: can't redefine non-configurable property "x" ](/en-US/docs/Web/JavaScript/Reference/Errors/Cant_redefine_property)
72. [ TypeError: can't set prototype: it would cause a prototype chain cycle ](/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_prototype)
73. [ TypeError: cannot use 'in' operator to search for 'x' in 'y' ](/en-US/docs/Web/JavaScript/Reference/Errors/in_operator_no_object)
74. [ TypeError: cyclic object value ](/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value)
75. [ TypeError: invalid 'instanceof' operand 'x' ](/en-US/docs/Web/JavaScript/Reference/Errors/invalid_right_hand_side_instanceof_operand)
76. [ TypeError: invalid Array.prototype.sort argument ](/en-US/docs/Web/JavaScript/Reference/Errors/Array_sort_argument)
77. [ TypeError: invalid assignment to const "x" ](/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_const_assignment)
78. [ TypeError: More arguments needed ](/en-US/docs/Web/JavaScript/Reference/Errors/More_arguments_needed)
79. [ TypeError: property "x" is non-configurable and can't be deleted