getElementsByTagName() method in javascript
getElementsByTagName() method is used to select every element with the specified tag name.
When using this method, it converts the given input value into lowercase case, so it is not suitable when searching camel-cased element.
So instead of this, getElementsByTagNameNS() method can be used.
Example Explanation
- In the above example we have two h1 and p elements, button and a Javascript function is declared for it (fun_name();).
- When the button is clicked Javascript function is called.
- In the Javascript function, first we are getting the h1 elements with specified its tag name(getElementsByTagName("h1");) and storing in elem variable.
- In the next step a for loop is created and every element in elem variable is displayed (alert(elem2.outerHTML);).