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