* 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>
2.9 KiB
id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5a24c314108439a4d4036146 | 映射 Dispatch 到 Props | 6 | 301432 | map-dispatch-to-props |
--description--
mapDispatchToProps()
函數可爲 React 組件提供特定的創建 action 的函數,以便組件可 dispatch actions,從而更改 Redux store 中的數據。 該函數的結構跟上一挑戰中的mapStateToProps()
函數相似, 它返回一個對象,把 dispatch actions 映射到屬性名上,該屬性名成爲props
。 然而,每個屬性都返回一個用 action creator 及與 action 相關的所有數據調用 dispatch
的函數,而不是返回 state
的一部分。 可以訪問 dispatch
,因爲在定義函數時,我們以參數形式把它傳入 mapDispatchToProps()
了,這跟 state
傳入 mapStateToProps()
是一樣的。 在幕後,React Redux 用 Redux 的 store.dispatch()
來管理這些含 mapDispatchToProps()
的dispatches, 這跟它使用 store.subscribe()
來訂閱映射到 state
的組件的方式類似。
例如,創建 action 的函數 loginUser()
把 username
作爲 action payload, mapDispatchToProps()
返回給創建 action 的函數的對象如下:
{
submitLoginUser: function(username) {
dispatch(loginUser(username));
}
}
--instructions--
編輯器上提供的是創建 action 的函數 addMessage()
。 寫出接收 dispatch
爲參數的函數 mapDispatchToProps()
,返回一個 dispatch 函數對象, 其屬性爲 submitNewMessage
。該函數在 dispatch addMessage()
時爲新消息提供一個參數。
--hints--
addMessage
應返回含 type
和 message
兩個鍵的對象。
assert(
(function () {
const addMessageTest = addMessage();
return (
addMessageTest.hasOwnProperty('type') &&
addMessageTest.hasOwnProperty('message')
);
})()
);
mapDispatchToProps
應爲函數。
assert(typeof mapDispatchToProps === 'function');
mapDispatchToProps
應返回一個對象。
assert(typeof mapDispatchToProps() === 'object');
從 mapDispatchToProps
通過 submitNewMessage
分發 addMessage
,應向 dispatch 函數返回一條消息。
assert(
(function () {
let testAction;
const dispatch = (fn) => {
testAction = fn;
};
let dispatchFn = mapDispatchToProps(dispatch);
dispatchFn.submitNewMessage('__TEST__MESSAGE__');
return (
testAction.type === 'ADD' && testAction.message === '__TEST__MESSAGE__'
);
})()
);
--seed--
--seed-contents--
const addMessage = (message) => {
return {
type: 'ADD',
message: message
}
};
// Change code below this line
--solutions--
const addMessage = (message) => {
return {
type: 'ADD',
message: message
}
};
// Change code below this line
const mapDispatchToProps = (dispatch) => {
return {
submitNewMessage: function(message) {
dispatch(addMessage(message));
}
}
};