javascriptNull / UndefinedMedium

A setting of zero falls back to the default

Time: 0:00

What it should do

retriesFor(settings) should use settings.retries when it is provided and fall back to 3 when it is missing. Setting retries to 0 means 'do not retry'.

What goes wrong

retriesFor({ retries: 0 }) returns 3 instead of 0 — turning retries off silently turns them back on.

Hints

This is a null and undefined errors bug

Cannot read properties of undefined, NoneType has no attribute, NaN appearing from nowhere.

Learn the null and undefined errors pattern