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  6. Lesson 4: Setup the Todo component

Lesson 4: Setup the Todo component

In this lesson, we'll create a Todo React component composed of only two React Spectrum components: Checkbox and TextField.

In a way similar to lesson 3, we'll create the React component file under web-src/src/components/ and name it Todo.js.

Import React Spectrum components

This component will make use of several React Spectrum components:

  • Flex for the layout.
  • TextField the input field for the todo value.
  • Checkbox to check a todo which is done.
import { Flex, Checkbox, TextField } from '@adobe/react-spectrum';

Component properties

The component will accept three properties:

  • name to identify the to-do list name
  • todo which holds the to-do ID, text value and checked status.
  • onUpdate which is the callback function invoked whenever the todo item is updated.
function Todo({ name, todo, onUpdate }) { // ... }

Updating a to-do item

Again, we're going to use the State hook useState to declare two state variables, bind one to the Checkbox and the other to the Textfield:

const [value, setValue] = useState(todo.value); const [isDone, setIsDone] = useState(todo.done);

Here we use the todo properties value and done to define the default state values.

Next we'll bind the value state to the TextField, update the value state with setValue(), and invoke the callback function onUpdate on every input change. onUpdate takes 2 parameters: the to-do list name and the todo object.

<TextField isDisabled={isDone} aria-label="Todo" width="100%" value={value} onChange={async (value) => { todo.value = value; setValue(value); onUpdate && (await onUpdate(name, todo)); }} isQuiet />

We'll do the same for Checkbox:

<Checkbox aria-label="done" isSelected={isDone} onChange={async (value) => { todo.done = value; setIsDone(value); onUpdate && (await onUpdate(name, todo)); }} isEmphasized value={value} />

Full component

Finally, we use the Flex layout to align the Checkbox with the TextField and finish our To-do component.

See the full component code here.

Todo