Current Stage:

• Stage 4

• Gabriel Isenberg (github, twitter)
• Daniel Ehrenberg (github, twitter)
• Daniel Rosenwasser (github, twitter)

When performing property accesses, it is often desired to provide a default value if the result of that property access is null or undefined. At present, a typical way to express this intent in JavaScript is by using the || operator.

const response = { settings: { nullValue: null, height: 400, animationDuration: 0, headerText: '', showSplashScreen: false } }; const undefinedValue = response.settings.undefinedValue || 'some other default'; // result: 'some other default' const nullValue = response.settings.nullValue || 'some other default'; // result: 'some other default'

This works well for the common case of null…