* chore: rename APIs and Microservices to include "Backend" (#42515) * fix typo * fix typo * undo change * Corrected grammar mistake Corrected a grammar mistake by removing a comma. * change APIs and Microservices cert title * update title * Change APIs and Microservices certi title * Update translations.json * update title * feat(curriculum): rename apis and microservices cert * rename folder structure * rename certificate * rename learn Markdown * apis-and-microservices -> back-end-development-and-apis * update backend meta * update i18n langs and cypress test Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: add development to front-end libraries (#42512) * fix: added-the-word-Development-to-front-end-libraries * fix/added-the-word-Development-to-front-end-libraries * fix/added-word-development-to-front-end-libraries-in-other-related-files * fix/added-the-word-Development-to-front-end-and-all-related-files * fix/removed-typos-from-last-commit-in-index.md * fix/reverted-changes-that-i-made-to-dependecies * fix/removed xvfg * fix/reverted changes that i made to package.json * remove unwanted changes * front-end-development-libraries changes * rename backend certSlug and README * update i18n folder names and keys * test: add legacy path redirect tests This uses serve.json from the client-config repo, since we currently use that in production * fix: create public dir before moving serve.json * fix: add missing script * refactor: collect redirect tests * test: convert to cy.location for stricter tests * rename certificate folder to 00-certificates * change crowdin config to recognise new certificates location * allow translations to be used Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> * add forwards slashes to path redirects * fix cypress path tests again * plese cypress * fix: test different challenge Okay so I literally have no idea why this one particular challenge fails in Cypress Firefox ONLY. Tom and I paired and spun a full build instance and confirmed in Firefox the page loads and redirects as expected. Changing to another bootstrap challenge passes Cypress firefox locally. Absolutely boggled by this. AAAAAAAAAAAAAAA * fix: separate the test Okay apparently the test does not work unless we separate it into a different `it` statement. >:( >:( >:( >:( Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com> Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com> Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
1.8 KiB
1.8 KiB
id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5a24c314108439a4d4036145 | 映射 State 到 Props | 6 | 301433 | map-state-to-props |
--description--
Provider
可向 React 組件提供 state
和 dispatch
,但必須確切地指定所需要的 state 和 actions, 以確保每個組件只能訪問所需的 state。 完成這個任務,需要創建兩個函數:mapStateToProps()
、mapDispatchToProps()
。
在這兩個函數中,聲明 state 中函數所要訪問的部分及需要 dispatch 的創建 action 的函數。 完成這些,我們就可以迎接下一個挑戰,學習如何使用 React Redux 的 connect
方法來把函數連接到組件了。
注意: 在幕後,React Redux 用 store.subscribe()
方法來實現 mapStateToProps()
。
--instructions--
創建 mapStateToProps()
函數, 以 state
爲參數,然後返回一個對象,該對象把 state 映射到特定屬性名上, 這些屬性能通過 props
訪問組件。 由於此示例把 app 應用的整個狀態保存在單一數組中,可把整個狀態傳給組件。 在返回的對象中創建 messages
屬性,並設置爲 state
。
--hints--
常量 state
應爲空數組。
assert(Array.isArray(state) && state.length === 0);
mapStateToProps
應爲函數。
assert(typeof mapStateToProps === 'function');
mapStateToProps
應返回一個對象。
assert(typeof mapStateToProps() === 'object');
把 state 數組傳入 mapStateToProps
後應返回賦值給 messages
鍵的數組。
assert(mapStateToProps(['messages']).messages.pop() === 'messages');
--seed--
--seed-contents--
const state = [];
// Change code below this line
--solutions--
const state = [];
// Change code below this line
const mapStateToProps = (state) => {
return {
messages: state
}
};