uuQuery.js is JavaScript library where the ID, Tag, ClassName and CSS selectors offered. Light and Right: Much faster and Good accurately. Conforms to W3C: Conform CSS Selector Module Level 3, and it operates correctly. All almost the interchangeability tests (1 2) of W3C are passed(exclude namespace). Funny functions: There are a regular expression operator and an operator who retrieves the element based on the computed style.There is a pseudoclass(:digit, :negative) for accounting. Compact: Only 7 kbyte(or 11 kbyte) minified and gzipped.