Class NoSsr

context

static contextType = MyContext
// For TS pre-3.7:
context!: React.ContextType<typeof MyContext>
// For TS 3.7 and above:
declare context: React.ContextType<typeof MyContext>
Copy

Readonlyprops

refs

state

Static OptionalcontextType

type MyContext = number
const Ctx = React.createContext<MyContext>(0)

class Foo extends React.Component {
  static contextType = Ctx
  context!: React.ContextType<typeof Ctx>
  render () {
    return <>My context's value: {this.context}</>;
  }
}
Copy

OptionalUNSAFE_componentWillMount

• UNSAFE_componentWillMount(): void

• Called immediately before mounting occurs, and before Component#render. Avoid introducing any side-effects or subscriptions in this method.

  This method will not stop working in React 17.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Returns void

  Deprecated

  16.3, use componentDidMount or the constructor instead

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

OptionalUNSAFE_componentWillReceiveProps

• UNSAFE_componentWillReceiveProps(nextProps, nextContext): void

• Called when the component may be receiving new props. React may call this even if props have not changed, so be sure to compare new and existing props if you only want to handle changes.

  Calling Component#setState generally does not trigger this method.

  This method will not stop working in React 17.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Parameters

  • nextProps: Readonly<INoSsrProps>
  • nextContext: any

  Returns void

  Deprecated

  16.3, use static getDerivedStateFromProps instead

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

OptionalUNSAFE_componentWillUpdate

• UNSAFE_componentWillUpdate(nextProps, nextState, nextContext): void

• Called immediately before rendering when new props or state is received. Not called for the initial render.

  Note: You cannot call Component#setState here.

  This method will not stop working in React 17.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Parameters

  • nextProps: Readonly<INoSsrProps>
  • nextState: Readonly<State>
  • nextContext: any

  Returns void

  Deprecated

  16.3, use getSnapshotBeforeUpdate instead

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

OptionalcomponentDidCatch

• componentDidCatch(error, errorInfo): void

• Catches exceptions generated in descendant components. Unhandled exceptions will cause the entire component tree to unmount.

  Parameters

  • error: Error
  • errorInfo: ErrorInfo

  Returns void

OptionalcomponentDidUpdate

• componentDidUpdate(prevProps, prevState, snapshot?): void

• Called immediately after updating occurs. Not called for the initial render.

  The snapshot is only present if getSnapshotBeforeUpdate is present and returns non-null.

  Parameters

  • prevProps: Readonly<INoSsrProps>
  • prevState: Readonly<State>
  • Optionalsnapshot: any

  Returns void

OptionalcomponentWillMount

• componentWillMount(): void

• Called immediately before mounting occurs, and before Component#render. Avoid introducing any side-effects or subscriptions in this method.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Returns void

  Deprecated

  16.3, use componentDidMount or the constructor instead; will stop working in React 17

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

OptionalcomponentWillReceiveProps

• componentWillReceiveProps(nextProps, nextContext): void

• Called when the component may be receiving new props. React may call this even if props have not changed, so be sure to compare new and existing props if you only want to handle changes.

  Calling Component#setState generally does not trigger this method.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Parameters

  • nextProps: Readonly<INoSsrProps>
  • nextContext: any

  Returns void

  Deprecated

  16.3, use static getDerivedStateFromProps instead; will stop working in React 17

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

OptionalcomponentWillUnmount

• componentWillUnmount(): void

• Called immediately before a component is destroyed. Perform any necessary cleanup in this method, such as cancelled network requests, or cleaning up any DOM elements created in componentDidMount.

  Returns void

OptionalcomponentWillUpdate

• componentWillUpdate(nextProps, nextState, nextContext): void

• Called immediately before rendering when new props or state is received. Not called for the initial render.

  Note: You cannot call Component#setState here.

  Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps prevents this from being invoked.

  Parameters

  • nextProps: Readonly<INoSsrProps>
  • nextState: Readonly<State>
  • nextContext: any

  Returns void

  Deprecated

  16.3, use getSnapshotBeforeUpdate instead; will stop working in React 17

  See

  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update
  • https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path

forceUpdate

• forceUpdate(callback?): void

• Parameters

  • Optionalcallback: (() => void)
    • • (): void

      • Returns void

  Returns void

OptionalgetSnapshotBeforeUpdate

• getSnapshotBeforeUpdate(prevProps, prevState): any

• Runs before React applies the result of render to the document, and returns an object to be given to componentDidUpdate. Useful for saving things such as scroll position before render causes changes to it.

  Note: the presence of getSnapshotBeforeUpdate prevents any of the deprecated lifecycle events from running.

  Parameters

  • prevProps: Readonly<INoSsrProps>
  • prevState: Readonly<State>

  Returns any

setState

• setState<K>(state, callback?): void

• Type Parameters

  • K extends "canRender"

  Parameters

  • state:
        | null
        | State
        | ((prevState: Readonly<State>, props: Readonly<INoSsrProps>) => null | State | Pick<State, K>)
        | Pick<State, K>
  • Optionalcallback: (() => void)
    • • (): void

      • Returns void

  Returns void

OptionalshouldComponentUpdate

• shouldComponentUpdate(nextProps, nextState, nextContext): boolean

• Called to determine whether the change in props and state should trigger a re-render.

  Component always returns true. PureComponent implements a shallow comparison on props and state and returns true if any props or states have changed.

  If false is returned, Component#render, componentWillUpdate and componentDidUpdate will not be called.

  Parameters

  • nextProps: Readonly<INoSsrProps>
  • nextState: Readonly<State>
  • nextContext: any

  Returns boolean