Optional catch binding

Published · tagged with ECMAScript ES2019

The catch clause of try statements used to require a binding:

try {
doSomethingThatMightThrow();
} catch (exception) {
// ^^^^^^^^^
// We must name the binding, even if we don’t use it!
handleException();
}

In ES2019, catch can now be used without a parameter. This is useful if you don’t have a need for the exception object in the code that handles the exception.

try {
doSomethingThatMightThrow();
} catch { // → No binding!
handleException();
}

Optional catch binding support