105 lines
3.2 KiB
JavaScript
105 lines
3.2 KiB
JavaScript
const smForm = document.createElement('template');
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smForm.innerHTML = `
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<style>
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*{
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padding: 0;
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margin: 0;
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box-sizing: border-box;
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}
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:host{
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display: grid;
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width: 100%;
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}
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form{
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display: inherit;
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gap: var(--gap, 1.5rem);
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width: 100%;
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}
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</style>
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<form part="form" onsubmit="return false">
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<slot></slot>
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</form>
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`;
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customElements.define('sm-form', class extends HTMLElement {
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constructor() {
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super()
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this.attachShadow({
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mode: 'open'
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}).append(smForm.content.cloneNode(true))
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this.form = this.shadowRoot.querySelector('form');
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this.formElements
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this.requiredElements
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this.submitButton
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this.resetButton
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this.invalidFields = false;
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this.mutationObserver
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this.debounce = this.debounce.bind(this)
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this._checkValidity = this._checkValidity.bind(this)
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this.handleKeydown = this.handleKeydown.bind(this)
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this.reset = this.reset.bind(this)
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this.elementsChanged = this.elementsChanged.bind(this)
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}
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debounce(callback, wait) {
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let timeoutId = null;
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return (...args) => {
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window.clearTimeout(timeoutId);
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timeoutId = window.setTimeout(() => {
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callback.apply(null, args);
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}, wait);
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};
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}
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_checkValidity() {
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if (!this.submitButton) return;
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this.invalidFields = this.requiredElements.filter(elem => !elem.isValid)
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this.submitButton.disabled = this.invalidFields.length;
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}
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handleKeydown(e) {
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if (e.key === 'Enter' && e.target.tagName.includes('SM-INPUT')) {
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if (!this.invalidFields.length) {
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if (this.submitButton) {
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this.submitButton.click()
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}
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this.dispatchEvent(new CustomEvent('submit', {
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bubbles: true,
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composed: true,
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}))
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} else {
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this.requiredElements.forEach(elem => { if (!elem.isValid) elem.vibrate() })
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}
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}
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}
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reset() {
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this.formElements.forEach(elem => elem.reset())
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}
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elementsChanged() {
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this.formElements = [...this.querySelectorAll('sm-input, sm-textarea, sm-checkbox, tags-input, file-input, sm-switch, sm-radio')]
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this.requiredElements = this.formElements.filter(elem => elem.hasAttribute('required'));
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this.submitButton = this.querySelector('[variant="primary"], [type="submit"]');
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this.resetButton = this.querySelector('[type="reset"]');
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if (this.resetButton) {
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this.resetButton.addEventListener('click', this.reset);
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}
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this._checkValidity()
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}
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connectedCallback() {
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this.shadowRoot.querySelector('slot').addEventListener('slotchange', this.elementsChanged)
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this.addEventListener('input', this.debounce(this._checkValidity, 100));
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this.addEventListener('keydown', this.debounce(this.handleKeydown, 100));
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this.mutationObserver = new MutationObserver(mutations => {
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mutations.forEach(mutation => {
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if (mutation.type === 'childList') {
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this.elementsChanged()
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}
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})
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})
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this.mutationObserver.observe(this, { childList: true, subtree: true })
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}
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disconnectedCallback() {
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this.removeEventListener('input', this.debounce(this._checkValidity, 100));
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this.removeEventListener('keydown', this.debounce(this.handleKeydown, 100));
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this.mutationObserver.disconnect()
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}
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}) |