The snippet library.
Small, practical examples. Search by task or narrow things down below.
Add calendar days in UTC
TypeScript: Use UTC date setters to cross month boundaries without local daylight-saving effects.
TypeScript✓ Tested
Await several independent results
Preserve input order while awaiting multiple promises.
Promise.all✓ Tested
Build a URL query string from values
TypeScript: URLSearchParams handles query escaping and repeated parameter appends.
TypeScript✓ Tested
Build an object from key-value entries
TypeScript: Object.fromEntries converts an iterable of pairs into ordinary own properties.
TypeScript✓ Tested
Calculate a page count with ceiling division
TypeScript: Use Math.ceil for a nonnegative item count and a positive page size.
TypeScript✓ Tested
Calculate a simple total
TypeScript: Multiply a unit price by a quantity, then add a delivery fee.
TypeScript✓ Tested
Calculate differences between adjacent readings
TypeScript: Slice off the first value and compare each remaining value with its predecessor.
TypeScript✓ Tested
Calculate integers beyond Number’s precise range
TypeScript: Use BigInt operands together to avoid precision loss.
TypeScript✓ Tested
Call a library function
TypeScript: Use a standard absolute-value function with a small negative number.
TypeScript✓ Tested
Check array membership with includes
TypeScript: includes uses SameValueZero comparison, which also matches NaN.
TypeScript✓ Tested
Check whether a value is a safe integer
TypeScript: Number.isSafeInteger also checks the exact-integer range supported by Number.
TypeScript✓ Tested
Check whether any item matches
TypeScript: some stops once a predicate succeeds.
TypeScript✓ Tested