I have a Login Page(StackNavigator) and a Tabbed pages(TabNavigator). After logging the user in there is still a possibility for the user to go back(to Login Page) by swiping back. What is the way of popping the login route from the Route Stack or disabling the back swipe option. Thanks Answer Dispatch a rese…
Tag: reactjs
React JS Error: is not defined react/jsx-no-undef
I’m developing a map functionality using ReactJS, My app.js file is: The error is: How can I solve this problem? Answer Try using When you use import ‘module’ it will just run the module as a script. This is useful when you are trying to introduce side-effects into global namespace, e. g. po…
Redux loses state when navigating to another page
I am building a web application using React and Redux. Redux works when I set the state on that page and then reaccess it through a statement like this.props.book.bookTitle, however, when I navigate to another page, redux loses it’s state and defaults to the initialState. Here is my code: bookDuck.js: r…
React router not showing browser history
I’m learning from this tutorial but I keep getting this error: ‘react-router’ does not contain an export named ‘browserHistory’. The file that has react-router is this: Answer You need to get browserHistory from the history module now. Note that they changed the module API recent…
Update one of the objects in array, in an immutable way
In React’s this.state I have a property called formErrors containing the following dynamic array of objects. Let’s say I would need to update state’s object having the fieldName cityId to the valid value of true. What’s the easiest or most common way to solve this? I’m OK to use …
React JS get current date
I want to output the current date in my componnent. In the console my code works, but the React console says: “bundle.js:14744 Uncaught RangeError: Maximum call stack size exceeded” My component looks like that: Yeah, I know I’m a pretty beginner, but maybe someone can help me. I googled for…
Rendering a React component using ES generator
I have a very basic implementation of a sleep function which resolves a promise after x miliseconds: I then need to render a React component in an ES6 Stateful Class Component after the sleep, but this sadly throws the error: Objects are not valid as a React child. Is there something wrong with this generator…
react router and express GET conflict
I’m not able to figure out how react router and express route working together. I have this The problem is my api can’t use GET because it will redirect to index.html. If I remove the wildcard route, then react-router would not be able to work properly. Answer Your app.get(‘*’) stateme…
Failed form propType: You provided a `value` prop to a form field without an `onChange` handler
When I load my react app I get this error in the console. Warning: Failed form propType: You provided a value prop to a form field without an onChange handler. This will render a read-only field. If the field should be mutable use defaultValue. Otherwise, set either onChange or readOnly. Check the render meth…
typescript + redux: exclude redux props in parent component
I am using redux and typescript for my current webapp. What is the best practice to define the props of a component which receives redux-actions via @connect, but also props from parent? Example: As I see it I got 2 solutions. Just pass the actions & state down through my whole app. But that would mean th…