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The DOM is a representation of a web page hierarchy of objects where each object corresponds to a node in the page tree. JavaScript can directly manipulate the style of an element through the property’s style. JavaScript also gives you access to several additional convenience links. The DOM data structure can be changed at will, we can add or remove almost everything. JavaScript is a programming language that can be used to interact with the structure of an HTML page. It's possible to manipulate the DOM with the help of the JavaScript language.