* 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>
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id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5a24c314108439a4d403617c | 使用生命週期方法:componentWillMount | 6 | 301423 | use-the-lifecycle-method-componentwillmount |
--description--
React 組件有幾種特殊方法,可以在組件生命週期的特定點執行操作。 這些稱爲生命週期方法或生命週期鉤子,允許在特定時間點捕獲組件。 這可以在渲染之前、更新之前、接收 props 之前、卸載之前等等。 以下是一些主要生命週期方法的列表: componentWillMount()
componentDidMount()
shouldComponentUpdate()
componentDidUpdate()
componentWillUnmount()
接下來的幾節課將講述這些生命週期方法的一些基本用例。
注意: componentWillMount
生命週期方法會在版本 16.X 廢棄在版本 17 移除。 (來源)
--instructions--
當組件被掛載到 DOM 時,componentWillMount()
方法在 render()
方法之前被調用。 在componentWillMount()
中將一些內容記錄到控制檯 -- 可能需要打開瀏覽器控制檯以查看輸出。
--hints--
MyComponent
應該渲染一個 div
元素。
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(MyComponent));
return mockedComponent.find('div').length === 1;
})()
);
應該在 componentWillMount
中調用 console.log
。
assert(
(function () {
const lifecycle = React.createElement(MyComponent)
.type.prototype.componentWillMount.toString()
.replace(/ /g, '');
return lifecycle.includes('console.log(');
})()
);
--seed--
--after-user-code--
ReactDOM.render(<MyComponent />, document.getElementById('root'))
--seed-contents--
class MyComponent extends React.Component {
constructor(props) {
super(props);
}
componentWillMount() {
// Change code below this line
// Change code above this line
}
render() {
return <div />
}
};
--solutions--
class MyComponent extends React.Component {
constructor(props) {
super(props);
}
componentWillMount() {
// Change code below this line
console.log('Component is mounting...');
// Change code above this line
}
render() {
return <div />
}
};