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125 lines
3.6 KiB
125 lines
3.6 KiB
<field-error>
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<div class="field-error" if={ state.errors.length > 0 }>
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<ul>
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<li each={ error in state.errors }>
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{ error }
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</li>
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</ul>
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</div>
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<script>
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/**
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* Shows errors of Validation and raise a element to
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* trigger single validation of field
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*
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* <field-error name="name" closest="<optional>" nofieldupdate></field-error>
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*
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* @author Björn Hase, Tentakelfabrik, me@tentakelfabrik.de
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*
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*/
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export default {
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state: {
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errors: [
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],
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// css class for
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closest: '.field-group',
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},
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/**
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*
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*
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* @param {Object} props
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* @param {Object} state
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*
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*/
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onBeforeMounted(props, state)
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{
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if (props.closest) {
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state.closest = props.closest
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}
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},
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/**
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*
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*
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* @param {Object} props
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* @param {Object} state
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*
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*/
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onMounted(props, state)
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{
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// getting parent element for entire field
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const parent = this.root.closest(state.closest)
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// getting current element by name
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const element = parent.querySelector('[name="' + props.name + '"]')
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// getting form
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const form = element.closest('form')
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// element, form are exists and nofieldupdate is not set
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// each change of the element dispatch a event to form validation
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if (element && form && !props.nofieldupdate) {
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element.addEventListener('input', (event) => {
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this.dispatchCustomEvent(event, form, props.name)
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})
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}
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// add custom event to listen to form-validation
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this.root.addEventListener('form-validation', (event) => {
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this.onFormValidation(event, parent)
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})
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},
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/**
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* process form validation triggered by form
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*
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* @param {Event} event
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* @param {Element} parent
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*
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*/
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onFormValidation(event, parent)
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{
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// if detail is a value, set to errors
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if (event.detail) {
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this.state.errors = event.detail
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parent.classList.add('field--error')
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parent.classList.remove('field--valid')
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} else {
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this.state.errors = []
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parent.classList.remove('field--error')
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parent.classList.add('field--valid')
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}
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this.update()
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},
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/**
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* create event to send to form validation
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*
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* @param {Event} event
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* @param {Element} form
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* @param {string} name
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*
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*/
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dispatchCustomEvent(event, form, name)
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{
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const fieldUpdateEvent = new CustomEvent('field-update', {
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'detail': {
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'name': name,
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'value': event.target.value
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}
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})
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form.dispatchEvent(fieldUpdateEvent)
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},
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}
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</script>
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</field-error>
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