react-prop-once
v1.0.1
Published
Higher-order component to cache props once on initial mount, and propagate them on every other render
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react-prop-once
Higher-order component to cache props once on initial mount, and propagate them on every other render
Useful for resolving values (e.g. props
) once after initial mount and re-using them as props on every render, rather than resolving them on every render()
call. These resolved props are merged with every nextProps
.
Internally, props are cached in getInitialState()
. This practice is considered an anti-Pattern, but through this higher-order component, this is the intended behaviour.
Usage
$ npm install --save react-prop-once
const once = require('react-prop-once');
function assignPropsOnMount(props) {
// called once on every mount
// ...
return {
answer: 42
};
}
function cleanOnUnmount(cached) {
// called once on every unmount
// optional clean up step
// cached is object returned by assignPropsOnMount(...)
}
const WrappedComponent = once(Component, assignPropsOnMount, cleanOnUnmount);
License
MIT