Fomu

Fomu (from japanese: フォーム fōmu) is a small library that handles forms in react. Its main qualities are:

1. Validation with error messages (async and with possibilty to cancel it!)
2. Generates JSON for submit or anything else (by abstract components like Scope, Array!)
3. Handling form submission (canceling previous submitting if there is!)

️⚠️Status

Currently under construction:

• Document the code and create docs
• Optimization (useMemo, useCallback, etc)

Example

import { Fomu, Form, Scope, ArrayField, Input, Checkbox, useFomu } from "fomu"
import api from "./my_api"

const Example = (props) => {
    const item = {
        name: "Playstation 4",
        markets: ["ES", "JP"],
    }
    const markets = ["US", "ES", "JP"]

    /**
     * reset the form to initial values
     * @param {FormContext<any>} form - fomu's context
     */
    const onReset = (form) => (e) => {
        e.preventDefault()
        form.handleReset()
    }

    /**
     * cancel all! (validations, submit, etc)
     * @param {FormContext<any>} form - fomu's context
     */
    const onCancel = (form) => (e) => {
        e.preventDefault()
        form.handleReset()
    }

    const ctx = useFomu({
        id: "formId",
        onSubmit: () => {
            // the json generated from Fomu would be:
            // {
            //     name: "Playstation 4",
            //     markets: ["US", "ES", "UK", "FR", "JP", "DE", "IT"],
            //     _data: {id: "3242621"}
            // }
            api(ctx.json())
        },
    })

    return (
        <Fomu ctx={ctx}>
            <Form method="post">
                {/* it will generate by json() method -> name: "Playstation 4" */}
                <Input
                    id="name"
                    path="name"
                    type="string"
                    value={item.name}
                    initialValue={item.name}
                    placeholder="Playstation 4"
                    validations={{ required: true }}
                />
                {props.errors.name && <span>error! {props.errors.name}</span>}
                {/* it will generate by json() method -> markets: ["ES", "JP"] */}
                <ArrayField id="markets" path="markets" validations={{ required: true }}>
                    {markets.map((market) => (
                        <Checkbox
                            id={market}
                            path=""
                            value={market}
                            initialChecked={item.some((d) => d == market)}
                            validEmptyValue
                        />
                    ))}
                </ArrayField>
                {props.errors.markets && <span>error! {props.errors.markets}</span>}
                {/* it will generate by json() method -> {_data: {id: "3242621"}} */}
                <Input id="id" path="_data.id" type="hidden" value="3242621" initialValue="3242621" />
                {/* the input "submit" is handled by fomu */}
                <input type="submit" value="Publicar" />
                <a href="" onClick={onReset(fomu)}>
                    RESET
                </a>
                <a href="" onClick={onCancel(fomu)}>
                    CANCEL
                </a>
                {/* functionality/info debug like "is submitting", cancel o reset form */}
                <FomuDebugger />
                <div>is submitting?: {props.isSubmitting ? "yes" : "no"}</div>
                <div>is validating?: {props.isValidating ? "yes" : "no"}</div>
                <div>is validated?: {props.isValidated ? "yes" : "no"}</div>
            </Form>
        </Fomu>
    )
}