Given the object { search: 'books', page: 2, filter: '' }, which code snippet correctly creates a query string excluding keys with empty values using URLSearchParams?
hard📝 Application Q8 of 15
Node.js - URL and Query String Handling
Given the object { search: 'books', page: 2, filter: '' }, which code snippet correctly creates a query string excluding keys with empty values using URLSearchParams?
Aconst params = new URLSearchParams(); for (const key in obj) { params.append(key, obj[key]); }
Bconst params = new URLSearchParams(obj); // automatically excludes empty values
Cconst params = new URLSearchParams(Object.entries(obj).filter(([_, v]) => v !== ''));
Dconst params = new URLSearchParams(); params.set('search', obj.search); params.set('page', obj.page);
Step-by-Step Solution
Solution:
Step 1: Identify the need to exclude empty values
We must filter out keys with empty string values before creating URLSearchParams.
Step 2: Analyze options
const params = new URLSearchParams(Object.entries(obj).filter(([_, v]) => v !== '')); filters entries where value is not empty, then passes to URLSearchParams.
Step 3: Why others are incorrect
B does not exclude empty values automatically; C appends all keys including empty; D manually sets only some keys, not scalable.
Final Answer:
const params = new URLSearchParams(Object.entries(obj).filter(([_, v]) => v !== '')); -> Option C
Quick Check:
Filter entries before passing to URLSearchParams to exclude empty values. [OK]
Quick Trick:Filter out empty values before creating URLSearchParams [OK]
