Web Reference: Description The setAttribute() method sets a new value to an attribute. If the attribute does not exist, it is created first. It should handle the different types of attributes (think "onload") correctly. Use getAttribute / setAttribute when you wish to deal with the DOM as it is (e.g. literal text only). Different browsers confuse the two. See Quirks modes: attribute (in)compatibility. Mar 23, 2026 · First we get the button element and set its name attribute to "helloButton" using setAttribute(). To demonstrate that the attribute name did change, we then get the attribute text and display it on the button.
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