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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(factory((global.reactLifecyclesCompat = {})));
}(this, (function (exports) { 'use strict';
/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
function componentWillMount() {
// Call this.constructor.gDSFP to support sub-classes.
var state = this.constructor.getDerivedStateFromProps(this.props, this.state);
if (state !== null && state !== undefined) {
this.setState(state);
}
}
function componentWillReceiveProps(nextProps) {
// Call this.constructor.gDSFP to support sub-classes.
// Use the setState() updater to ensure state isn't stale in certain edge cases.
function updater(prevState) {
var state = this.constructor.getDerivedStateFromProps(nextProps, prevState);
return state !== null && state !== undefined ? state : null;
}
// Binding "this" is important for shallow renderer support.
this.setState(updater.bind(this));
}
function componentWillUpdate(nextProps, nextState) {
try {
var prevProps = this.props;
var prevState = this.state;
this.props = nextProps;
this.state = nextState;
this.__reactInternalSnapshotFlag = true;
this.__reactInternalSnapshot = this.getSnapshotBeforeUpdate(
prevProps,
prevState
);
} finally {
this.props = prevProps;
this.state = prevState;
}
}
// React may warn about cWM/cWRP/cWU methods being deprecated.
// Add a flag to suppress these warnings for this special case.
componentWillMount.__suppressDeprecationWarning = true;
componentWillReceiveProps.__suppressDeprecationWarning = true;
componentWillUpdate.__suppressDeprecationWarning = true;
function polyfill(Component) {
var prototype = Component.prototype;
if (!prototype || !prototype.isReactComponent) {
throw new Error('Can only polyfill class components');
}
if (
typeof Component.getDerivedStateFromProps !== 'function' &&
typeof prototype.getSnapshotBeforeUpdate !== 'function'
) {
return Component;
}
// If new component APIs are defined, "unsafe" lifecycles won't be called.
// Error if any of these lifecycles are present,
// Because they would work differently between older and newer (16.3+) versions of React.
var foundWillMountName = null;
var foundWillReceivePropsName = null;
var foundWillUpdateName = null;
if (typeof prototype.componentWillMount === 'function') {
foundWillMountName = 'componentWillMount';
} else if (typeof prototype.UNSAFE_componentWillMount === 'function') {
foundWillMountName = 'UNSAFE_componentWillMount';
}
if (typeof prototype.componentWillReceiveProps === 'function') {
foundWillReceivePropsName = 'componentWillReceiveProps';
} else if (typeof prototype.UNSAFE_componentWillReceiveProps === 'function') {
foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps';
}
if (typeof prototype.componentWillUpdate === 'function') {
foundWillUpdateName = 'componentWillUpdate';
} else if (typeof prototype.UNSAFE_componentWillUpdate === 'function') {
foundWillUpdateName = 'UNSAFE_componentWillUpdate';
}
if (
foundWillMountName !== null ||
foundWillReceivePropsName !== null ||
foundWillUpdateName !== null
) {
var componentName = Component.displayName || Component.name;
var newApiName =
typeof Component.getDerivedStateFromProps === 'function'
? 'getDerivedStateFromProps()'
: 'getSnapshotBeforeUpdate()';
throw Error(
'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
componentName +
' uses ' +
newApiName +
' but also contains the following legacy lifecycles:' +
(foundWillMountName !== null ? '\n ' + foundWillMountName : '') +
(foundWillReceivePropsName !== null
? '\n ' + foundWillReceivePropsName
: '') +
(foundWillUpdateName !== null ? '\n ' + foundWillUpdateName : '') +
'\n\nThe above lifecycles should be removed. Learn more about this warning here:\n' +
'https://fb.me/react-async-component-lifecycle-hooks'
);
}
// React <= 16.2 does not support static getDerivedStateFromProps.
// As a workaround, use cWM and cWRP to invoke the new static lifecycle.
// Newer versions of React will ignore these lifecycles if gDSFP exists.
if (typeof Component.getDerivedStateFromProps === 'function') {
prototype.componentWillMount = componentWillMount;
prototype.componentWillReceiveProps = componentWillReceiveProps;
}
// React <= 16.2 does not support getSnapshotBeforeUpdate.
// As a workaround, use cWU to invoke the new lifecycle.
// Newer versions of React will ignore that lifecycle if gSBU exists.
if (typeof prototype.getSnapshotBeforeUpdate === 'function') {
if (typeof prototype.componentDidUpdate !== 'function') {
throw new Error(
'Cannot polyfill getSnapshotBeforeUpdate() for components that do not define componentDidUpdate() on the prototype'
);
}
prototype.componentWillUpdate = componentWillUpdate;
var componentDidUpdate = prototype.componentDidUpdate;
prototype.componentDidUpdate = function componentDidUpdatePolyfill(
prevProps,
prevState,
maybeSnapshot
) {
// 16.3+ will not execute our will-update method;
// It will pass a snapshot value to did-update though.
// Older versions will require our polyfilled will-update value.
// We need to handle both cases, but can't just check for the presence of "maybeSnapshot",
// Because for <= 15.x versions this might be a "prevContext" object.
// We also can't just check "__reactInternalSnapshot",
// Because get-snapshot might return a falsy value.
// So check for the explicit __reactInternalSnapshotFlag flag to determine behavior.
var snapshot = this.__reactInternalSnapshotFlag
? this.__reactInternalSnapshot
: maybeSnapshot;
componentDidUpdate.call(this, prevProps, prevState, snapshot);
};
}
return Component;
}
exports.polyfill = polyfill;
Object.defineProperty(exports, '__esModule', { value: true });
})));
|
