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On February 16, 2019, React 16.8 was released to the public, introducing React Hooks. [18] Hooks are functions that let developers "hook into" React state and lifecycle features from function components. [19]
By mid 2016, Abramov had joined the React team and passed the primary maintainership on to Mark Erikson and Tim Dorr. [7] In February 2019, useReducer was introduced as a React hook in the 16.8 release. It provides an API that is consistent with Redux, enabling developers to create Redux-like stores that are local to component states.
Hook methods are of particular importance in the template method pattern where common code in an abstract class can be augmented by custom code in a subclass. In this case each hook method is defined in the abstract class with an empty implementation which then allows a different implementation to be supplied in each concrete subclass.
The hook effect refers to the prozone phenomenon, also known as antibody excess, or the postzone phenomenon, also known as antigen excess. It is an immunologic phenomenon whereby the effectiveness of antibodies to form immune complexes can be impaired when concentrations of an antibody or an antigen are very high.
To alleviate these issues, React was the first major library to adopt a virtual DOM in 2013, which removed both the performance bottlenecks (since diffing and reconciling the DOM was relatively cheap) and the difficulty of binding data (since components were effectively just objects). [9]
A memoized function "remembers" the results corresponding to some set of specific inputs. Subsequent calls with remembered inputs return the remembered result rather than recalculating it, thus eliminating the primary cost of a call with given parameters from all but the first call made to the function with those parameters.
"Hook" is a song by American rock band Blues Traveler, from their fourth studio album, Four (1994). The title of the song is a reference to the term hook , a short musical riff that is used in popular music to make a song appealing and to "catch the ear of the listener". [ 2 ]
In January 2013, New York became the first U.S. state to act after the Sandy Hook Elementary School shooting. The Secure Ammunition and Firearms Enforcement (SAFE) Act passed in the state Senate 43–18 on January 15 and cleared the New York State Assembly after about five hours of debate on Tuesday, January 16.