fieldz-mobx

Example

yarn add fieldz

or

npm i --save fieldz

add to your app:

import React, { useState } from 'react';
import { useText, Text } from 'fieldz'
import './App.scss';

function App() {
  const newTodo = useText({
    name: 'newTodo',
    validate: val => {
      if (val.length < 3) {
        return "Must be at least 3 characters long."
      }
    }
  })
  const [todos, setTodos] = useState<string[]>([])
  return (
    <div className="App">
      <Text {...newTodo}
        onEnter={() => {
          setTodos([
            ...todos,
            newTodo.state
          ])
          newTodo.setState('')
        }}/>
      <ul>
        {todos.map((todo, i) => <li key={i}>{todo}</li>)}
      </ul>
    </div>
  );
}

export default App;

Any of the properties passed to the Text component can be overridden, like normally. This means you can do stuff like create a custom handleChange handler.

For instance, you could have a custom handler that parse the value into an integer if it is able to:

<Text {...newTodo}
  handleChange={e => {
    const {value} = e.target
    if (!isNaN(parseInt(value)) {
      newTodo.setState(parseInt(value))
    }
  }}
/>

But that is just an example...this is a really good feature, because it means this whole thing is basically infinitely flexible, which can come in handy for corner cases.

Todo

add generics to the type for useText (for numbers or other things that can be converted into strings)

Contributing

To Test

yarn
yarn link
cd test-app
yarn link fieldz
yarn start