frontend

问题 This question already has answers here : Strange behavior of React hooks: delayed data update (3 answers) Closed 22 days ago . In the React Native App, after I click the toggle button, the function _toggleServerSwitch gets triggered. Then I change the state serverSwitchValue to the same value as x . Expected : serverSwitchValue and x should have the same value when console.log() . Actual : When console.log(), the two variables have different values. It seems that the program works, but at the

问题 From this tweet: http://twitter.com/azaaza/status/6508524118 I reach a website which is made completely in Flash (at least the front end). alt text http://img704.imageshack.us/img704/3116/screenshotvz.png It looks fantastic and it could have been written with HTML + Ajax, but I guess ( because I don't know much flash my self ) they site owners felt more comfortable with Flash and thought it would be easier ( once again, I guess this happens when you have thousands of flight hours with flash )

问题 I have a code <div class="flex-container" *ngIf="mail"> Some data </div> And i have a error Can't bind to 'ngIf' since it isn't a known property of 'div'. How i can fix it? 回答1: Import BrowserModule in the root module and CommonModule in other modules where you want to use common directives. @NgModule({ imports: [BrowserModule], ... }) class AppModule {} and @NgModule({ imports: [CommonModule], // Now MyComponent has access to ngIf declarations: [MyComponent] ... }) class OtherModule {}

问题 I have a problem with routing to a specific part of another functional component in React. I have declared Route in Main component and Link around the place where I want to redirect from... it looks like this... The main function gets: <Switch> <Route exact path='/news/:eyof' component={News} /> <Route exact path='/news/:svetsko' component={News} /> <Route exact path='/news' component={News} /> </Switch> And I defined in other functional component: <div className="card"> <Link to="/news/

问题 This question already has answers here : Minimum screen resolution for Android devices (6 answers) Closed 4 years ago . What is the lowest screen resolution for a smartphone? is it 320x480 ? 回答1: nowadays after release android watch .. minimum resolution of screen is (a smart watch) with 240 x 240 resolution BUT Lowest Resolution is (240 x 320) for smart phone There are a couple of phones that use this resolution including the HTC Tattoo and Wildfire. The smallest device of is the 2.55" QVGA

问题 I have a page that takes 8-10 seconds to load, as the server makes an API call to an external service which crunches some big numbers. This is called after submitting a form. Initially, I showed a CSS loading animation in an overlay to show the user the page is actually doing something. I then augmented this by calling some code every 2 seconds with window.setTimeout(), updating a progress bar and showing a message saying what the system is doing. It's fake, of course, but it makes the time

问题 How can I hide an element with Vue.js when it is clicked? There's only one element to hide. A jQuery solution would look like that: $('.button').click(function() { $('.hideme').hide(); ); But what is the Vue.js equivalent of this? 回答1: First of all jQuery works out of the box. This is one main difference. So you have to initialize your Vue Component or App. You are binding that component with its data to one specific HTML tag inside your template. In this example the specified element is <div

问题 I am using create-react-app to create a react application. When I executes npm test -- --coverage the test never exists. npm test actually runs react-scripts test . Any Idea? 回答1: -- --coverage part won't work, and should use one of the commands below to set CI to true . By default npm test runs the watcher with interactive CLI. However, you can force it to run tests once and finish the process by setting an environment variable called CI. source: React docs Windows (cmd.exe) set CI=true &&

问题 I am using create-react-app to create a react application. When I executes npm test -- --coverage the test never exists. npm test actually runs react-scripts test . Any Idea? 回答1: -- --coverage part won't work, and should use one of the commands below to set CI to true . By default npm test runs the watcher with interactive CLI. However, you can force it to run tests once and finish the process by setting an environment variable called CI. source: React docs Windows (cmd.exe) set CI=true &&

问题 I am looking for a front end for our operator to run our Talend jobs. We do not want him to have the ability to delete or modify jobs. Only to run them and monitor their results. Any suggestions for tools for doing this? Thanks 回答1: The subscription version of Talend (called Talend Integration Suite, or TIS) has precisely that. It's a web-based console called Talend Administration Center (TAC) and it allows an operator to run jobs and monitor their results -- among many other things. The