reactjs

问题 I have problem with my React App opening in Safari and especially my private routing.Error: SyntaxError: Unexpected token 'const' I have ordinary rooting function: function App() { return ( <Router history={history}> <Switch> <Route path="/" exact component={Home} /> <Route path="/login" component={Login} /> <PrivateRoute path="/dash" component={Dashboard} /> <PrivateRoute path="/filters" component={Filters} /> <PrivateRoute path="/profile" component={Profile} /> <PrivateRoute path="/map"

问题 I have problem with my React App opening in Safari and especially my private routing.Error: SyntaxError: Unexpected token 'const' I have ordinary rooting function: function App() { return ( <Router history={history}> <Switch> <Route path="/" exact component={Home} /> <Route path="/login" component={Login} /> <PrivateRoute path="/dash" component={Dashboard} /> <PrivateRoute path="/filters" component={Filters} /> <PrivateRoute path="/profile" component={Profile} /> <PrivateRoute path="/map"

问题 I have multiple whole html code in variable cleanHTML and i need to strip specific tags from text. let cleanHTML = document.documentElement.outerHTML this: <span class="remove-me">please</span> <span class="remove-me">me too</span> <span class="remove-me">and me</span> to this: please me too and me I´m trying to do it with: var list = cleanHTML.getElementsByClassName("remove-me"); var i; for (i = 0; i < list.length; i++) { list[i] = list[i].innerHTML; } But i´m getting error from React

问题 I have multiple whole html code in variable cleanHTML and i need to strip specific tags from text. let cleanHTML = document.documentElement.outerHTML this: <span class="remove-me">please</span> <span class="remove-me">me too</span> <span class="remove-me">and me</span> to this: please me too and me I´m trying to do it with: var list = cleanHTML.getElementsByClassName("remove-me"); var i; for (i = 0; i < list.length; i++) { list[i] = list[i].innerHTML; } But i´m getting error from React

问题 I'm using Yup.js to validate some form fields. I have two integer fields, Year Built & Year Renovated . Year Built is a required field, Year Renovated is not. Year renovated can be left blank, however if there is a value it should be larger than year built (for a renovation certainly must occur after the date it was built). I believe I need to use yup's ref() as well as yup's when() function. I've tried the following: let currentYear = new Date().getFullYear(); yup.object().shape({ yearBuilt

问题 Recently I have found Visual Code has a nice feature for type checking in JavaScript files. All I have to do is to type on top of file // @ts-check , it is great benefit for me, so I want to use it globally on every JavaScript file, how could I could I do it without writing that line every time on top of a file? 回答1: As per Aleksey L. comment I added to root directory tsconfig.json with this configuration and it works: { "compilerOptions": { "module": "system", "noImplicitAny": false,

问题 I am asking this question from a best practice point of view - the answers I've found on here are about more specific problems to an individual code base. I am happy to be pointed in the right direction if it's already been answered or to be shown another way if what I am attempting is not considered good practice - I may have misunderstood some concepts... I am learning React and am building a simple app using it. Mainly in order to keep my code tidy, I have created two files. First file - I

问题 I'm a React JS newbie, I have this code that creates an app div with some MusicPlayer tag elements: class App extends React.Component { render() { return ( <div id="app"> <MusicPlayer id="2" visualizerType="RIPPLES" theme={darkTheme} trackInfo={{ title: "Imitosis", artist: "Andrew Bird", album: "Armchair Apocrypha" }} trackUrl="https://s3-us-west-2.amazonaws.com/teddarcuri.monarch/Andrew+Bird+-+Imitosis.mp3" albumArt="https://s3-us-west-2.amazonaws.com/teddarcuri.monarch/andrew+bird.jpg"

问题 I'm a React JS newbie, I have this code that creates an app div with some MusicPlayer tag elements: class App extends React.Component { render() { return ( <div id="app"> <MusicPlayer id="2" visualizerType="RIPPLES" theme={darkTheme} trackInfo={{ title: "Imitosis", artist: "Andrew Bird", album: "Armchair Apocrypha" }} trackUrl="https://s3-us-west-2.amazonaws.com/teddarcuri.monarch/Andrew+Bird+-+Imitosis.mp3" albumArt="https://s3-us-west-2.amazonaws.com/teddarcuri.monarch/andrew+bird.jpg"

问题 I was trying to understand what's the difference between ReactDOMServer.renderToString() and ReactDOMServer.renderToStaticMarkup() on React 16.8.6. This is what I understood: renderToStaticMarkup() is used on the server side when you just want to render the markup and don't want to hydrate it on the client side. (https://reactjs.org/docs/react-dom-server.html#rendertostaticmarkup) renderToString() is used on the server side when you want to use the ReactDOM.hydrate() function to hydrate the