render

问题 I am using a res.redirect('page.ejs'); and on my browser I get the message: Cannot GET /page.ejs I have not declared this in my routes file in the style of : app.get('/page', function(req, res) { res.render('page.ejs'); }); Should this be included in order for the res.redirect() to work? When I do not use res.redirect() but res.render() , even if I have not the app.get() code, it still works. 回答1: so to understand this, let's look at what each of these methods do. res.redirect('page.ejs');

问题 I am using library react-google-maps, and i want to use DirectionsRenderer between two nodes. Here is my state this.state={ currentPosition:{lat: 26.84 ,lng: 75.80}, destinationPosition:{lat: 26.84 ,lng: 75.80}, }; I want to show the direction between my current location and marker. And my componentDidMount() is inside render method. Here is the code for render method class map extends React.PureComponent{ constructor(props){ super(props); this.state={ currentPosition:{lat: 26.84 ,lng: 75.80}

问题 I have a user control that contains the following elements: <UserControl ...> <ScrollViewer Name="LayoutScroll" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"> <Grid Name="MainGrid"> <Canvas x:Name="LayerObjects" Panel.ZIndex="2" Width="{Binding ActualWidth,ElementName=MainGrid}" Height="{Binding ActualHeight, ElementName=MainGrid}"> <Canvas.CacheMode> <BitmapCache EnableClearType="False" SnapsToDevicePixels="False" RenderAtScale="2"/> </Canvas.CacheMode> </Canvas> <

问题 I have a user control that contains the following elements: <UserControl ...> <ScrollViewer Name="LayoutScroll" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"> <Grid Name="MainGrid"> <Canvas x:Name="LayerObjects" Panel.ZIndex="2" Width="{Binding ActualWidth,ElementName=MainGrid}" Height="{Binding ActualHeight, ElementName=MainGrid}"> <Canvas.CacheMode> <BitmapCache EnableClearType="False" SnapsToDevicePixels="False" RenderAtScale="2"/> </Canvas.CacheMode> </Canvas> <

问题 I'm going to introduce my question in two steps with slightly different code blocks in both. Step 1: Below we have a React application which renders itself every two seconds and therefore causes the browser to print render to the console. If the user presses any key, the renders will stop which in turn stops the console prints. Please ignore the line commented out for now. import { useState, useEffect, useRef } from 'react'; function App() { const [number, setUpdate] = useState(0); const

问题 Problem I'm using the gem "render_async" to render content asynchronously. When I visit a page like localhost:3000/people , the content gets rendered asynchronously, as expected. However, the content does not get rendered asynchronously, if it is inside a partial that got loaded via ajax. I don't understand why it isn't working and I don't know how to fix it. How can I use render_async, if it is inside a partial that got loaded via ajax? gem render_async: https://github.com/renderedtext

问题 having a bit of trouble. I should start by saying I'm really new to react native so hopefully it's not something foolish I've missed. I'm using firebase to store image uri's but when I try to pass them in render from my function it gives me the {_40:0,_65:0,_55:null,_72:null} output but in the function, it seems to get the uri just fine so it seems to be something with passing it back. I've tried using AsyncImage (using the sunglass dog example: https://www.npmjs.com/package/react-native

问题 In an angular 5 component I have a table , and I need to create something like overlaying multiple div s above several td 's. What's the best way to get the position of those td 's in the table so I can position the other elements? I'm currently trying to use something like @ViewChild('table') tableElement: ElementRef ngAfterViewChecked() { this.tableElement.nativeElement.getElementsByClassName('cell') // ... } But I'm risking some weird infinite loops doing it this way. Is there a way to

问题 Hello and thank you for your time reading this question: I was trying to do an excercise to learn React, and because of I recently did a code in JS to load a file from local, an image, into a canvas, and then when user clicks on it circles are drawn; I tryed to do the same in React. Here is the JS excercise: https://codereview.stackexchange.com/questions/186526/read-an-image-file-into-a-canvas-and-display-click-coordinates I have created a canvas in Canvas' component's render(), and after

问题 Currently, I see behavior like this: render() { const list = []; return ( <div> { list.length && <div>List rendered</div> } </div> ) } My expected is nothing rendered with that condition, but string "0" rendered (string "0" is list.length ). I don't know why. Anybody can help me explain this case to React? 回答1: That's basically the way, short-circuit evaluation is designed: As logical expressions are evaluated left to right, they are tested for possible "short-circuit" evaluation using the