53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
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import React from "react";
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import PropTypes from "prop-types";
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import invariant from "tiny-invariant";
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import Lifecycle from "./Lifecycle.js";
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import RouterContext from "./RouterContext.js";
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/**
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* The public API for prompting the user before navigating away from a screen.
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*/
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function Prompt({ message, when = true }) {
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return (
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<RouterContext.Consumer>
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{context => {
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invariant(context, "You should not use <Prompt> outside a <Router>");
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if (!when || context.staticContext) return null;
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const method = context.history.block;
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return (
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<Lifecycle
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onMount={self => {
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self.release = method(message);
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}}
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onUpdate={(self, prevProps) => {
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if (prevProps.message !== message) {
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self.release();
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self.release = method(message);
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}
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}}
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onUnmount={self => {
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self.release();
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}}
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message={message}
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/>
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);
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}}
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</RouterContext.Consumer>
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);
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}
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if (__DEV__) {
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const messageType = PropTypes.oneOfType([PropTypes.func, PropTypes.string]);
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Prompt.propTypes = {
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when: PropTypes.bool,
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message: messageType.isRequired
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};
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}
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export default Prompt;
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