whiteinge/index.html

## index.html
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">

        <title>A wrapper around FormData</title>

        <style>
            form > div { margin-bottom: 1em; }
        </style>

        <script>
        function handleSubmit(ev) {
            ev.preventDefault();

            const data = getFormData(ev.target, ev.submitter)
            console.log('XXX', data)

            // ---

            /**
            A wrapper around FormData to return booleans for checkboxes and
            arrays for compound elements (for easier JSON serialization)
            **/
            function getFormData(formEl, submitter) {
                const formData = new FormData(formEl, submitter)

                const data = Array.from(formData.keys()).reduce((acc, key) => {
                    const vals = formData.getAll(key)
                    const val = vals.length > 1 ? vals : vals.shift()
                    acc[key] = val
                    return acc
                }, {})

                const isValidCheckbox = x => x.name != null
                    && x.disabled !== true
                    && x.type === 'checkbox'

                const checkboxes = Array.from(formEl.elements)
                    .filter(isValidCheckbox)
                    .reduce((acc, el) => {
                        const item = formEl.elements.namedItem(el.name)
                        const vals = (item.length > 1 ? Array.from(item) : [item])
                            .filter(isValidCheckbox)
                            .map(x => x.checked)
                        const val = vals.length > 1 ? vals : vals.shift()

                        acc[el.name] = val
                        return acc
                    }, {})

                return Object.assign(data, checkboxes)
            }
        }
        </script>
    </head>

    <body>
        <form id="form" onsubmit="handleSubmit(event)">
            <div>
                text1:
                <input type="text" name="text1" value="foo" />
            </div>
            <div>
                text2:
                <input type="text" name="text2" value="bar" />
                <input type="text" name="text2" value="baz" />
            </div>
            <div>
                text3:
                <input type="text" name="text3" />
            </div>

            <div>
                check1:
                <input type="checkbox" name="check1" checked />
            </div>
            <div>
                check2:
                <input type="checkbox" name="check2" checked disabled />
            </div>
            <div>
                check3:
                <input type="checkbox" name="check3" />
                <input type="checkbox" name="check3" checked />
                <input type="checkbox" name="check3" checked disabled />
            </div>

            <div>
                selectSingle:<br>
                <select name="selectSingle">
                    <option value="first">First Value</option>
                    <option value="second" selected>Second Value</option>
                    <option value="third">Third Value</option>
                </select>
            </div>

            <div>
                selectMultiple:<br>
                <select name="selectMultiple" multiple size="4">
                    <optgroup label="4-legged pets">
                    <option value="dog" selected>Dog</option>
                    <option value="cat" selected>Cat</option>
                    <option value="hamster" disabled>Hamster</option>
                    </optgroup>
                    <optgroup label="Flying pets">
                    <option value="parrot">Parrot</option>
                    <option value="macaw">Macaw</option>
                    <option value="albatross">Albatross</option>
                    </optgroup>
                </select>
            </div>

            <div>
                radio1:<br>
                <input type="radio" name="radio1" value="email" checked />
                <label for="contactChoice1">Email</label>
                <input type="radio" name="radio1" value="phone" />
                <label for="contactChoice2">Phone</label>
                <input type="radio" name="radio1" value="mail" />
                <label for="contactChoice3">Mail</label>
            </div>

            <div>
                radio2:<br>
                <input type="radio" name="radio2" value="email" />
                <label for="contactChoice1">Email</label>
                <input type="radio" name="radio2" value="phone" />
                <label for="contactChoice2">Phone</label>
                <input type="radio" name="radio2" value="mail" />
                <label for="contactChoice3">Mail</label>
            </div>

            <div>
                image1:
                <input type="file" name="image1" accept="image/png, image/jpeg">
            </div>

            <div>
                button1:<br>
                <button name="button1" value="save">Save</button>
                <button name="button1" value="saveAsCopy">Save As Copy</button>
            </div>
        </form>
    </body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<title>A wrapper around FormData</title>

	<style>
	form > div { margin-bottom: 1em; }
	</style>

	<script>
	function handleSubmit(ev) {
	ev.preventDefault();

	const data = getFormData(ev.target, ev.submitter)
	console.log('XXX', data)

	// ---

	/**
	A wrapper around FormData to return booleans for checkboxes and
	arrays for compound elements (for easier JSON serialization)
	**/
	function getFormData(formEl, submitter) {
	const formData = new FormData(formEl, submitter)

	const data = Array.from(formData.keys()).reduce((acc, key) => {
	const vals = formData.getAll(key)
	const val = vals.length > 1 ? vals : vals.shift()
	acc[key] = val
	return acc
	}, {})

	const isValidCheckbox = x => x.name != null
	&& x.disabled !== true
	&& x.type === 'checkbox'

	const checkboxes = Array.from(formEl.elements)
	.filter(isValidCheckbox)
	.reduce((acc, el) => {
	const item = formEl.elements.namedItem(el.name)
	const vals = (item.length > 1 ? Array.from(item) : [item])
	.filter(isValidCheckbox)
	.map(x => x.checked)
	const val = vals.length > 1 ? vals : vals.shift()

	acc[el.name] = val
	return acc
	}, {})

	return Object.assign(data, checkboxes)
	}
	}
	</script>
	</head>

	<body>
	<form id="form" onsubmit="handleSubmit(event)">
	<div>
	text1:
	<input type="text" name="text1" value="foo" />
	</div>
	<div>
	text2:
	<input type="text" name="text2" value="bar" />
	<input type="text" name="text2" value="baz" />
	</div>
	<div>
	text3:
	<input type="text" name="text3" />
	</div>

	<div>
	check1:
	<input type="checkbox" name="check1" checked />
	</div>
	<div>
	check2:
	<input type="checkbox" name="check2" checked disabled />
	</div>
	<div>
	check3:
	<input type="checkbox" name="check3" />
	<input type="checkbox" name="check3" checked />
	<input type="checkbox" name="check3" checked disabled />
	</div>

	<div>
	selectSingle:<br>
	<select name="selectSingle">
	<option value="first">First Value</option>
	<option value="second" selected>Second Value</option>
	<option value="third">Third Value</option>
	</select>
	</div>

	<div>
	selectMultiple:<br>
	<select name="selectMultiple" multiple size="4">
	<optgroup label="4-legged pets">
	<option value="dog" selected>Dog</option>
	<option value="cat" selected>Cat</option>
	<option value="hamster" disabled>Hamster</option>
	</optgroup>
	<optgroup label="Flying pets">
	<option value="parrot">Parrot</option>
	<option value="macaw">Macaw</option>
	<option value="albatross">Albatross</option>
	</optgroup>
	</select>
	</div>

	<div>
	radio1:<br>
	<input type="radio" name="radio1" value="email" checked />
	<label for="contactChoice1">Email</label>
	<input type="radio" name="radio1" value="phone" />
	<label for="contactChoice2">Phone</label>
	<input type="radio" name="radio1" value="mail" />
	<label for="contactChoice3">Mail</label>
	</div>

	<div>
	radio2:<br>
	<input type="radio" name="radio2" value="email" />
	<label for="contactChoice1">Email</label>
	<input type="radio" name="radio2" value="phone" />
	<label for="contactChoice2">Phone</label>
	<input type="radio" name="radio2" value="mail" />
	<label for="contactChoice3">Mail</label>
	</div>

	<div>
	image1:
	<input type="file" name="image1" accept="image/png, image/jpeg">
	</div>

	<div>
	button1:<br>
	<button name="button1" value="save">Save</button>
	<button name="button1" value="saveAsCopy">Save As Copy</button>
	</div>
	</form>
	</body>
	</html>