@tramvai/react v3.40.28
title: '@tramvai/react'
sidebar_position: 2
React
@tramvai/react
- library for integrating tramvai features with React
components
Install
npm i --save @tramvai/react
DI
When creating components, you may need to get data from di, for this there is a hook useDi
and HoC withDi
useDi
type useDi = (deps: Record<string, string | Token>) => Record<string, any>;
type useDi = (dep: string | Token) => any;
A hook into which we can pass both an object with the required dependencies and an object with data will be returned to us, as well as a single token, where the result will be returned to us. When we call useDi
, we get data from di and if we don't find data in di, an error will occur.
import React from 'react';
import { useDi } from '@tramvai/react';
const MyComponent = () => {
const { logger } = useDi({ logger: 'logger' }); // pass the object
const Region = useDi(regionToken); // pass a single token
logger.info('text');
return (
<div>
Component
<Region />
</div>
);
};
withDi
type withDi = (
deps: Record<string, string | Token>
) => (wrapper: React.ReactElement<any>) => React.ReactElement<any>;
A HoC that allows you to wrap any components, get data from DI
and pass the result with dependencies to the props of the component
import React from 'react';
import { withDi } from '@tramvai/react';
@withDi({ logger: LOGGER_TOKEN })
class BoxyPage extends Component {
render() {
this.props.logger.info('text');
return <div>Component</div>;
}
}
useDiContainer
type useDiContainer = () => DI.Container;
Getting an instance of a DI container that has been added to the application context.
It is better not to use this hook, as it is very low-level and is intended for developing new hooks
Error
To handle errors during rendering, React uses Error Boundary. This package provides its own version of Error Boundary which will log an error through a generic logger and display a stub for the wrapped component if an error occurs.
ErrorBoundary
Error Boundary component that monitors errors down the tree and, in case of a render error, will log an error and display the fallbackComponent
component (passed as a props, by default it is a FallbackError from this package) instead of the fallen render subtree.
You can override the fallbackComponent
through the ERROR_BOUNDARY_FALLBACK_COMPONENT_TOKEN
provider.
FallbackError
Component used by default as a stub for a subtree in which a render error occurred
withError
Hook wrapping component in ErrorBoundary.
lazy
To dynamically import components with SSR support, there is a high order lazy
component:
import { lazy } from '@tramvai/react';
const LazyComponent = lazy(() => import('./components/foo'), {
loading: <div>Loading...</div>,
});
<LazyComponent />;
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