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<h1 class="page-title">Source: components/seSelect.js</h1>
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<pre class="prettyprint source linenums"><code>import { t } from '../locale.js'
const template = document.createElement('template')
template.innerHTML = `
<style>
select {
margin-top: 8px;
background-color: var(--input-color);
appearance: none;
outline: none;
padding: 3px;
}
label {
margin-left: 2px;
}
::slotted(*) {
padding:0;
width:100%;
}
</style>
<label></label>
<select>
</select>
`
/**
* @class SeList
*/
export class SeSelect extends HTMLElement {
/**
* @function constructor
*/
constructor () {
super()
// create the shadowDom and insert the template
this._shadowRoot = this.attachShadow({ mode: 'open' })
this._shadowRoot.append(template.content.cloneNode(true))
this.$select = this._shadowRoot.querySelector('select')
this.$label = this._shadowRoot.querySelector('label')
}
/**
* @function observedAttributes
* @returns {any} observed
*/
static get observedAttributes () {
return ['label', 'width', 'height', 'options', 'values', 'title', 'disabled']
}
/**
* @function attributeChangedCallback
* @param {string} name
* @param {string} oldValue
* @param {string} newValue
* @returns {void}
*/
attributeChangedCallback (name, oldValue, newValue) {
let options
if (oldValue === newValue) return
switch (name) {
case 'label':
this.$label.textContent = t(newValue)
break
case 'title':
this.$select.setAttribute('title', t(newValue))
break
case 'disabled':
if (newValue === null) {
this.$select.removeAttribute('disabled')
} else {
this.$select.setAttribute('disabled', newValue)
}
break
case 'height':
this.$select.style.height = newValue
break
case 'width':
this.$select.style.width = newValue
break
case 'options':
if (newValue === '') {
while (this.$select.firstChild) { this.$select.removeChild(this.$select.firstChild) }
} else {
options = newValue.split(',')
options.forEach((option) => {
const optionNode = document.createElement('OPTION')
const text = document.createTextNode(t(option))
optionNode.appendChild(text)
this.$select.appendChild(optionNode)
})
}
break
case 'values':
if (newValue === '') {
while (this.$select.firstChild) { this.$select.removeChild(this.$select.firstChild) }
} else {
options = newValue.split('::')
options.forEach((option, index) => {
this.$select.children[index].setAttribute('value', option)
})
}
break
default:
console.error(`unknown attribute: ${name}`)
break
}
}
/**
* @function get
* @returns {any}
*/
get label () {
return this.getAttribute('label')
}
/**
* @function set
* @returns {void}
*/
set label (value) {
this.setAttribute('label', value)
}
/**
* @function get
* @returns {any}
*/
get width () {
return this.getAttribute('width')
}
/**
* @function set
* @returns {void}
*/
set width (value) {
this.setAttribute('width', value)
}
/**
* @function get
* @returns {any}
*/
get height () {
return this.getAttribute('height')
}
/**
* @function set
* @returns {void}
*/
set height (value) {
this.setAttribute('height', value)
}
/**
* @function get
* @returns {any}
*/
get value () {
return this.$select.value
}
/**
* @function set
* @returns {void}
*/
set value (value) {
this.$select.value = value
}
/**
* @function get
* @returns {any}
*/
get disabled () {
return this.$select.getAttribute('disabled')
}
/**
* @function set
* @returns {void}
*/
set disabled (value) {
this.$select.setAttribute('disabled', value)
}
/**
* @function connectedCallback
* @returns {void}
*/
connectedCallback () {
const currentObj = this
this.$select.addEventListener('change', () => {
const value = this.$select.value
const closeEvent = new CustomEvent('change', { detail: { value } })
currentObj.dispatchEvent(closeEvent)
currentObj.value = value
})
}
}
// Register
customElements.define('se-select', SeSelect)
</code></pre>
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