我需要在自定義反應組件的shouldComponentUpdate函數中使用shallowCompare函數。我得到以下錯誤:無法導入react-addons-shallow-compare,Typescript
app.js:95084 Uncaught TypeError: Cannot read property 'shallowCompare' of undefined
我已經安裝了反應 - 插件 - 淺比較版本15.3.0,我發現它在node_modules。它看起來像這樣:
module.exports = require('react/lib/shallowCompare');
而這是shallowCompare.js引用。
/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule shallowCompare
*/
'use strict';
var shallowEqual = require('fbjs/lib/shallowEqual');
/**
* Does a shallow comparison for props and state.
* See ReactComponentWithPureRenderMixin
* See also https://facebook.github.io/react/docs/shallow-compare.html
*/
function shallowCompare(instance, nextProps, nextState) {
return !shallowEqual(instance.props, nextProps) || !shallowEqual(instance.state, nextState);
}
module.exports = shallowCompare;
我也安裝了類型。我有這個版本:
// Generated by typings
// Source: https://raw.githubusercontent.com/DefinitelyTyped/DefinitelyTyped/6a36f6d5b61602b6c4ad932599097135e80abaf4/react/react-addons-shallow-compare.d.ts
declare namespace __React {
namespace __Addons {
export function shallowCompare<P, S>(
component: __React.Component<P, S>,
nextProps: P,
nextState: S): boolean;
}
}
declare module "react-addons-shallow-compare" {
var shallowCompare: typeof __React.__Addons.shallowCompare;
export = shallowCompare;
}
現在我試圖導入它並將其用於我的一個文件中。我已經嘗試過每種導入策略。
import { __Addons as ReactAddons } from "react";
/* ... other stuff ... */
ReactAddons.shallowCompare(this, nextProps, nextState);
或者
import shallowCompare = require("react-addons-shallow-compare");
/* ... other stuff ... */
shallowCompare(this, nextProps, nextState);
或者
import shallowCompare = __React.__Addons.shallowCompare;
/* ... other stuff ... */
shallowCompare(this, nextProps, nextState);
在最後一種情況下,我得到的錯誤是不是上面提到的,但
Uncaught ReferenceError: __React is not defined
作爲提,我正在使用Typescript 1.8.10。
對於它的價值,我也收到以下錯誤:
Failed to parse SourceMap
我挺憋屈的這一段時間了。一些幫助將不勝感激。
謝謝!
你有沒有試過const shallowCompareCompare = require('react-addons-shallow-compare'); ? – QoP
@QoP我得到一個錯誤,如果我嘗試這樣做:'錯誤TS2349:不能調用一個表達式,其類型缺少一個調用簽名。'是不是應該有一個'import'的地方? –
是的,你可以使用import - >'import shallowCompare from'react-addons-shallow-compare'' – QoP