The expression is resolved in the same way as Promise.resolve(): it's always converted to a native Promise and then awaited. Otherwise, if the rejected promise is not awaited or is immediately returned, the caller function will not appear in the stack trace. The function containing the await expression will appear in the stack trace of the error. If the promise is rejected, the await expression throws the rejected value. When execution resumes, the value of the await expression becomes that of the fulfilled promise. Using await pauses the execution of its surrounding async function until the promise is settled (that is, fulfilled or rejected).
#F1 2017 beginners guide code
Warning: unreachable code after return statementĪwait is usually used to unwrap promises by passing a Promise as the expression.Warning: String.x is deprecated use instead.Warning: expression closures are deprecated.Warning: 08/09 is not a legal ECMA-262 octal constant.Warning: -file- is being assigned a //# sourceMappingURL, but already has one.TypeError: X.prototype.y called on incompatible type.TypeError: setting getter-only property "x".TypeError: Reduce of empty array with no initial value.TypeError: property "x" is non-configurable and can't be deleted.TypeError: invalid assignment to const "x".TypeError: invalid 'instanceof' operand 'x'.TypeError: cannot use 'in' operator to search for 'x' in 'y'.TypeError: can't redefine non-configurable property "x".TypeError: can't delete non-configurable array element.TypeError: can't define property "x": "obj" is not extensible.TypeError: can't convert BigInt to number.TypeError: can't assign to property "x" on "y": not an object.TypeError: "x" is not a non-null object.Synta圎rror: Using to indicate sourceURL pragmas is deprecated.Synta圎rror: unterminated string literal.Synta圎rror: unparenthesized unary expression can't appear on the left-hand side of '**'.Synta圎rror: Unexpected '#' used outside of class body.Synta圎rror: test for equality (=) mistyped as assignment (=)?.Synta圎rror: redeclaration of formal parameter "x".Synta圎rror: missing = in const declaration.Synta圎rror: missing } after property list.Synta圎rror: missing } after function body.Synta圎rror: missing ] after element list.Synta圎rror: missing ) after argument list.Synta圎rror: missing : after property id.Synta圎rror: Malformed formal parameter.Synta圎rror: invalid regular expression flag "x".Synta圎rror: invalid assignment left-hand side.Synta圎rror: identifier starts immediately after numeric literal.Synta圎rror: function statement requires a name.Synta圎rror: for-in loop head declarations may not have initializers.Synta圎rror: cannot use `?` unparenthesized within `||` and `&` expressions.Synta圎rror: applying the 'delete' operator to an unqualified name is deprecated.Synta圎rror: a declaration in the head of a for-of loop can't have an initializer.Synta圎rror: "x" is a reserved identifier.
Synta圎rror: "use strict" not allowed in function with non-simple parameters.Synta圎rror: "0"-prefixed octal literals and octal escape seq.ReferenceError: reference to undefined property "x".ReferenceError: deprecated caller or arguments usage.ReferenceError: can't access lexical declaration 'X' before initialization.ReferenceError: assignment to undeclared variable "x".RangeError: x can't be converted to BigInt because it isn't an integer.RangeError: repeat count must be non-negative.RangeError: repeat count must be less than infinity.RangeError: argument is not a valid code point.Error: Permission denied to access property "x".Enumerability and ownership of properties.
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