![]() This is particularly a problem for long running applications. For example, Twitter detaches and re-attaches tweets as you scroll through the feed.Ī DOM memory leak occurs when an application keeps references to more and more of these detached elements, without actually reusing them later.Īs application code grows in size and complexity, it becomes easier to make mistakes and forget to clean things up, which could lead to unknowingly keeping DOM elements in memory. An application might want to remove an element from the view but re-attach it later or in a different place. ![]() There are valid reasons for detaching elements from the tree. In this code example, we get a node from the DOM tree, remove it from the tree, and store it in a JavaScript array: const listOfElements = Ĭonst divElement = document.querySelector('.my-element-class') But it is possible to create nodes and never attach them or remove nodes from the page and keep references to them in JavaScript. Usually, we create DOM nodes in JavaScript to insert them somewhere in the page to display them. Before you try this new tool on your own web content, it’s important to understand some of the nuances between detached elements and DOM leaks. ![]()
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