天道酬勤,学无止境

reactjs

Is there a way to sync local redux store with remote data?

I am looking to create an application with local redux store. But I want the store to sync frequently with a remote store over internet. I'm looking for something like git or rsync that can solve conflicts and keep versions. Is there any library in react that can do this?

2021-09-24 18:37:21    分类:问答    reactjs   redux

undefined is not an object (evaluating '_this3.props.navigation.navigate')

Problem with stack navigation between the screens. I am displaying data on my 'SveKategorije' screen. It's basically categories buttons, when i click on button i just want to show another screen for now, but it is not working for some reason. When i put onPress={() => this.props.navigation.navigate('screenname')} it gives me this error I am using (react-native - 0.57.7) Here is router.js code (where i declare my routes) import React from 'react'; import { View, Text, Button } from "react-native"; import { createBottomTabNavigator, createStackNavigator } from "react-navigation"; import { Icon }

2021-09-24 18:19:16    分类:问答    javascript   reactjs   react-native

Downloading Large Number of Files in Frontend using jszip

Unable to zip all the files using jszip. JS zip is reading all 402 files as shown in snapshot from the console from around 143 requests but zipping only 143 files. I am using parallelimit to process multiple async requests simultaneously and cleanly. I am How can we get all the 403 files in the result? private downloadUntouchedFiles = () => { let requestObjectInfo = []; let index = 0; this._eventEmitter.emit(Constants.LOADER_CHANGE, { show: true }); this._eligibilitySubmissionInstance.getUntouchedFiles(this.state.filterObject).then((requests) => { debugger; if (!(!requests)) { if (requests

2021-09-24 18:15:12    分类:问答    javascript   reactjs   jszip

IFormFile in .NET Core Web API is null for axios and ajax file upload but works in Postman

Introduction So I have an API that will upload a file to Azure with the following signature: public async Task<IActionResult> Post([FromForm]IEnumerable<IFormFile> files) This API was built and tested with Postman and it works great with the following parameters: But when I attempt to call it within my react app with either the AJAX jQuery generated by Postman or axios, the IFormFile file variable is null. handleFileChange = async (event) => { let formData = new FormData(); let files = event.target.files[0]; formData.append('file', logo); // Can put "files" here or the imported picture "logo"

2021-09-24 18:02:32    分类:问答    javascript   reactjs   asp.net-core   axios   asp.net-core-webapi

Nodemailer doesn't work correctly Full React & Redux Project with Node and Express

I have a React website that is just plain, informative website for the Homeless community. It also has the contact us form pages with Nodemailer in Nodejs. It's been deployed in Ubuntu 16.04. But now I want to add Full MERN stack to the website along with those informative web pages. Its has Login and Register with JWT and Passport. When I logged into the website and trying to use the contact us form, doesn't send the mail. If logout, Nodemailer works perfectly. I don't know if it's something to do with JWT/Passport, CORS, or Port??? Error: Access to XMLHttpRequest at 'http:/

2021-09-24 14:27:25    分类:问答    node.js   reactjs   axios   ubuntu-16.04   nodemailer

React - passing a function to a child component does nothing

First I must say that I have looked at all the "Passing a function to a child component" on this site and did not find the solution to my problem. I have a parent class: import React from 'react'; import $ from 'jquery'; import Project from './Project'; import NewProjectModal from './NewProjectModal'; /** * A projects menu */ class ProjectsMenu extends React.Component { constructor(props) { super(props); var projects = []; this.state = {_projects : projects}; this.handleClick = this.handleClick.bind(this); } handleClick(e) { e.preventDefault(); console.log("Hello there"); } render() { return (

2021-09-24 13:05:10    分类:问答    javascript   reactjs

Get the path of a certain Route in react-router

Using react-router in with react i have declared some routes like this: <Route name="voteview" path="voteview/:baselineId" handler={VoteView}/> In a React Component, i want to call this route. React Router gives me a link: <Link to="voteview" params={{baselineId: this.props.data.baselineId}}>Voteview</Link> This results in a <a href...> link. But i want to use the url path programmatically, not in an <a href...> link. How can i get the URL path to the "voteview" route programmatically?

2021-09-24 12:32:56    分类:问答    javascript   reactjs   react-router

How to conditionally add a className?

I have the following with react-redux-form: <fieldset> <label>{label}</label> <div> <input {...input} name="email" type="text" className="form-control" /> {touched && error && <span className="error">{error}</span>} </div> </fieldset> I would like to be able to update <fieldset> with either className="" className="has-success" className="has-danger" The logic would be: If touched but no error: <fieldset className="has-success"> If touched and error: <fieldset className="has-danger"> If not touched nor error: <fieldset className=""> How can I get this working in React?

2021-09-24 12:30:42    分类:问答    twitter-bootstrap   reactjs   react-redux   redux-form

How to focus next input (if any) on next press

I actually know how to this but I need a different approach. So I have text input like: <TextInput returnKeyType='next' ref={ref => this.someName = ref} onSubmitEditing={(event) => { this.nextFieldName.focus() }}/> Trick is that I don't want to use specific name for next field but to simply focus next if any to focus. Is this possible?

2021-09-24 08:55:24    分类:问答    reactjs   react-native

Instance property in React ES6 class

How come in React you can define state like below: class Test extends React.Component { state = { foo: 'bar' } } But in order to define other instance properties you need to do it in the constructor or other functions? As in, you can't do this: class Test extends React.Component { myField = 0; render() { myField++ } }

2021-09-24 08:26:46    分类:问答    javascript   reactjs   es6-class