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react-clientside-effect
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Readme
Create components whose prop changes map to a global side effect.
This is client-side variation of the original react-side-effect, for client-side components. It does nothing on server side.
npm install --save react-clientside-effect
document.body.style.margin
or background color depending on current screen;componentDidUpdate
?It gathers current props across the whole tree before passing them to side effect. For example, this allows you to create <BodyStyle style>
component like this:
// RootComponent.js
return (
<BodyStyle style={{ backgroundColor: 'red' }}>
{this.state.something ? <SomeComponent /> : <OtherComponent />}
</BodyStyle>
);
// SomeComponent.js
return (
<BodyStyle style={{ backgroundColor: this.state.color }}>
<div>Choose color: <input valueLink={this.linkState('color')} /></div>
</BodyStyle>
);
and let the effect handler merge style
from different level of nesting with innermost winning:
import { Component, Children } from 'react';
import PropTypes from 'prop-types';
import withSideEffect from 'react-side-effect';
class BodyStyle extends Component {
render() {
return Children.only(this.props.children);
}
}
BodyStyle.propTypes = {
style: PropTypes.object.isRequired
};
function reducePropsToState(propsList) {
var style = {};
propsList.forEach(function (props) {
Object.assign(style, props.style);
});
return style;
}
function handleStateChangeOnClient(style) {
Object.assign(document.body.style, style);
}
export default withSideEffect(
reducePropsToState,
handleStateChangeOnClient
)(BodyStyle);
withSideEffect: (reducePropsToState, handleStateChangeOnClient, [mapStateOnServer]) -> ReactComponent -> ReactComponent
A higher-order component that, when mounting, unmounting or receiving new props, calls reducePropsToState
with props
of each mounted instance. It is up to you to return some state aggregated from these props.
On the client, every time the returned component is (un)mounted or its props change, reducePropsToState
will be called, and the recalculated state will be passed to handleStateChangeOnClient
where you may use it to trigger a side effect.
Here's how to implement React Document Title (both client and server side) using React Side Effect:
import React, { Children, Component } from 'react';
import PropTypes from 'prop-types';
import withSideEffect from 'react-side-effect';
class DocumentTitle extends Component {
render() {
if (this.props.children) {
return Children.only(this.props.children);
} else {
return null;
}
}
}
DocumentTitle.propTypes = {
title: PropTypes.string.isRequired
};
function reducePropsToState(propsList) {
var innermostProps = propsList[propsList.length - 1];
if (innermostProps) {
return innermostProps.title;
}
}
function handleStateChangeOnClient(title) {
document.title = title || '';
}
export default withSideEffect(
reducePropsToState,
handleStateChangeOnClient
)(DocumentTitle);
FAQs
Create components whose prop changes map to a global side effect
The npm package react-clientside-effect receives a total of 1,499,256 weekly downloads. As such, react-clientside-effect popularity was classified as popular.
We found that react-clientside-effect demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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