What this snippet does
Builder is ideal when object construction needs many optional steps — each step is explicit and the final build() creates the object.
Expected output
{ method: 'POST', headers: { 'Content-Type': 'application/json', Authorization: 'Bearer token123' }, body: '{"name":"Alice"}' }Why practise typing this
Typing design patterns code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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