60 lines
1.3 KiB
TypeScript
60 lines
1.3 KiB
TypeScript
import React, { Component } from 'react'
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const isServer = typeof window === 'undefined'
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type State = JSX.Element[] | undefined
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type SideEffectProps = {
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reduceComponentsToState: <T>(
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components: Array<React.ReactElement<any>>,
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props: T
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) => State
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handleStateChange?: (state: State) => void
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headManager: any
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inAmpMode?: boolean
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}
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export default class extends Component<SideEffectProps> {
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private _hasHeadManager: boolean
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emitChange = (): void => {
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if (this._hasHeadManager) {
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this.props.headManager.updateHead(
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this.props.reduceComponentsToState(
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[...this.props.headManager.mountedInstances],
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this.props
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)
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)
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}
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}
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constructor(props: any) {
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super(props)
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this._hasHeadManager =
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this.props.headManager && this.props.headManager.mountedInstances
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if (isServer && this._hasHeadManager) {
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this.props.headManager.mountedInstances.add(this)
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this.emitChange()
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}
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}
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componentDidMount() {
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if (this._hasHeadManager) {
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this.props.headManager.mountedInstances.add(this)
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}
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this.emitChange()
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}
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componentDidUpdate() {
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this.emitChange()
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}
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componentWillUnmount() {
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if (this._hasHeadManager) {
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this.props.headManager.mountedInstances.delete(this)
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}
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this.emitChange()
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}
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render() {
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return null
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}
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}
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