Function polyfill

app/src/static/js/react-bootstrap.js:8028–8104

(Component)

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');
    }