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Description

Ref: #7955

IMO most codebases would prefer to avoid nullish coalescing in conditional tests.

Consider the downlevelled output:

if (x || y) { }

// vs

if (x ?? y) { } 
// downlevelled to
if (x != null ? x : y) { }

There's an extra check there that doesn't do anything.

The logic behind the latter is much harder to grasp exactly, IMO:

• If x is truthy, then true,
• If x is falsey and not nullish, then false,
• Else the boolean coercion of y

vs the former:

• If x is falsey then false
• Else the boolean coercion of y

It's just A lot simpler to read and understand the non-nullish-coalescing form, IMO.

Impacted Configurations

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Additional Info

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