The React Docs give us the following example for the React. mo is a higher order component (HOC) that allows us to wrap a component and control whether or not it is updated/re-rendered by defining a function that tells react whether or not it's props are different - and effectively whether this should trigger a new renderÄoing the above is useful for complex components that don't necessarily need to be rendered every time their props are changed API Definition By using memo, you are telling React that your component complies with this requirement, so React doesnât need to re-render as long as its props havenât changed. This means that it must return the same output if its props, state, and context havenât changed. In this video you will learn react memo hooks in detail.what is react memo in detailreact memo in hindireact code optimization in detailreact optimization in. mo allows us to take control of the props triggered render by giving us a way to look into the prop-change process A React component should always have pure rendering logic. This is useful because it prevents unnecessary renders and performance costs. In React, memoization controls the re-rendering of an entire component based on a change in props or state. Weâll take the same example above but use mo() in our component. Memoization in React differs from the conventional method of memoization in plain Javascript.Amongst these are the built-in hooks (like useState, useCallback, etc.) as well as some other functions for manipulating React Elements directly - which I've covered in a previous post on The React Top Level API Component RenderingÄ«y default, React will trigger a component render whenever there is a change to its state or props. mo() is a higher-order component (HOC), which is a fancy name for a component that takes a component as a prop and returns a component that prevents a component from re-rendering if the props (or values within it) have not changed. React does a shallow comparison of prop values. ![]() ![]() The comparison function is used to compare the old and new props of the component to determine if the component should be re-rendered. mo React does an initial render of the component when it first loads and stores it in memory. This method takes two parameters: the component to be memoized, and an optional comparison function. If your component renders the same result given the same props, you can wrap it in a call to mo(.) for a performance boost in some cases by memoizing. The React library contains some functions at it's top level scope. To memoize a function, it needs to be wrapped in a call to the mo() method.
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