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in the previous lecture you will learn how to select an element by its id this method selects a single element the html tag with the id but what if you want an element that doesnt have an id or you want to select multiple elements on a page for example you might want to select all the items inside an unordered list so you can turn them into to-do list items that users can click to mark a task is done well if you know the tag name of the element you can use a method called document.getelement by tag name this method is very similar to the previous one we have learned but keep in mind that this method contains the word elements while the last one has element so if you mix these up you definitely get an error because each method returns a different data type while getelementbyid method returns a single element that can be accessed directly the getelementsbytagname method returns a collection of elements a collection is like an array that you can access an element using its index number
