126 lines
3.8 KiB
JavaScript
126 lines
3.8 KiB
JavaScript
const smForm = document.createElement('template');
|
|
smForm.innerHTML = `
|
|
<style>
|
|
*{
|
|
padding: 0;
|
|
margin: 0;
|
|
box-sizing: border-box;
|
|
}
|
|
:host{
|
|
display: grid;
|
|
width: 100%;
|
|
}
|
|
form{
|
|
display: inherit;
|
|
gap: var(--gap, 1.5rem);
|
|
width: 100%;
|
|
}
|
|
</style>
|
|
<form part="form" onsubmit="return false">
|
|
<slot></slot>
|
|
</form>
|
|
`;
|
|
|
|
customElements.define('sm-form', class extends HTMLElement {
|
|
constructor() {
|
|
super()
|
|
this.attachShadow({
|
|
mode: 'open'
|
|
}).append(smForm.content.cloneNode(true))
|
|
|
|
this.form = this.shadowRoot.querySelector('form');
|
|
this.formElements
|
|
this.submitButton
|
|
this.resetButton
|
|
this.invalidFields = false;
|
|
this.mutationObserver
|
|
|
|
this.debounce = this.debounce.bind(this)
|
|
this._checkValidity = this._checkValidity.bind(this)
|
|
this.handleKeydown = this.handleKeydown.bind(this)
|
|
this.reset = this.reset.bind(this)
|
|
this.elementsChanged = this.elementsChanged.bind(this)
|
|
}
|
|
debounce(callback, wait) {
|
|
let timeoutId = null;
|
|
return (...args) => {
|
|
window.clearTimeout(timeoutId);
|
|
timeoutId = window.setTimeout(() => {
|
|
callback.apply(null, args);
|
|
}, wait);
|
|
};
|
|
}
|
|
_checkValidity() {
|
|
if (!this.submitButton) return;
|
|
this.invalidFields = this._requiredElements.filter(([elem, isWC]) => isWC ? !elem.isValid : !elem.checkValidity())
|
|
this.submitButton.disabled = this.invalidFields.length > 0;
|
|
}
|
|
handleKeydown(e) {
|
|
if (e.key === 'Enter' && e.target.tagName.includes('INPUT')) {
|
|
if (!this.invalidFields.length) {
|
|
if (this.submitButton) {
|
|
this.submitButton.click()
|
|
}
|
|
this.dispatchEvent(new CustomEvent('submit', {
|
|
bubbles: true,
|
|
composed: true,
|
|
}))
|
|
} else {
|
|
for (const [elem, isWC] of this._requiredElements) {
|
|
const invalid = isWC ? !elem.isValid : !elem.checkValidity()
|
|
if (invalid) {
|
|
(elem?.shadowRoot?.lastElementChild || elem).animate([
|
|
{ transform: 'translateX(-1rem)' },
|
|
{ transform: 'translateX(1rem)' },
|
|
{ transform: 'translateX(-0.5rem)' },
|
|
{ transform: 'translateX(0.5rem)' },
|
|
{ transform: 'translateX(0)' },
|
|
], {
|
|
duration: 300,
|
|
easing: 'ease'
|
|
});
|
|
if (isWC) elem.focusIn()
|
|
else elem.focus()
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
reset() {
|
|
this.formElements.forEach(elem => elem.reset())
|
|
}
|
|
elementsChanged() {
|
|
this._requiredElements = [];
|
|
this.formElements = [...this.querySelectorAll('input, sm-input, sm-textarea, sm-checkbox, tags-input, file-input, sm-switch, sm-radio')]
|
|
this.formElements.forEach(elem => {
|
|
if (elem.hasAttribute('required')) {
|
|
this._requiredElements.push([elem, elem.tagName.includes('-')])
|
|
}
|
|
});
|
|
this.submitButton = this.querySelector('[variant="primary"], [type="submit"]');
|
|
this.resetButton = this.querySelector('[type="reset"]');
|
|
if (this.resetButton) {
|
|
this.resetButton.addEventListener('click', this.reset);
|
|
}
|
|
this._checkValidity()
|
|
}
|
|
connectedCallback() {
|
|
this.shadowRoot.querySelector('slot').addEventListener('slotchange', this.elementsChanged)
|
|
this.addEventListener('input', this.debounce(this._checkValidity, 100));
|
|
this.addEventListener('keydown', this.debounce(this.handleKeydown, 100));
|
|
this.mutationObserver = new MutationObserver(mutations => {
|
|
mutations.forEach(mutation => {
|
|
if (mutation.type === 'childList') {
|
|
this.elementsChanged()
|
|
}
|
|
})
|
|
})
|
|
this.mutationObserver.observe(this, { childList: true, subtree: true })
|
|
}
|
|
disconnectedCallback() {
|
|
this.removeEventListener('input', this.debounce(this._checkValidity, 100));
|
|
this.removeEventListener('keydown', this.debounce(this.handleKeydown, 100));
|
|
this.mutationObserver.disconnect()
|
|
}
|
|
}) |