querySelector querySelectorAll in javascript javascript tutorials in hindi

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=9x8wxmm0R98

The querySelector() method returns the first element that matches a specified CSS selector(s) in the document. • Note: The querySelector() method only returns the first element that matches the specified selectors. To return all the matches, use the querySelectorAll() method instead. • If the selector matches an ID in document that is used several times (Note that an id should be unique within a page and should not be used more than once), it returns the first matching element. • Syntax-- • document.querySelector(CSS selectors) • • The querySelectorAll() method returns all elements in the document that matches a specified CSS selector(s), as a static NodeList object. • The NodeList object represents a collection of nodes. The nodes can be accessed by index numbers. The index starts at 0. • Tip: You can use the length property of the NodeList object to determine the number of elements that matches the specified selector, then you can loop through all elements and extract the info you want. • Syntax-- • document.querySelectorAll(CSS 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