mirror of
https://github.com/NoRedInk/noredink-ui.git
synced 2024-12-12 01:33:25 +03:00
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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CustomElement = require('../CustomElement')
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CustomElement.create({
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tagName: 'nri-textarea-v4',
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initialize: function() {
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this._autoresize = false
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},
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onConnect: function() {
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this._textarea = this.querySelector('textarea')
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this._updateListener()
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},
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observedAttributes: ['data-autoresize'],
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onAttributeChange: function(name, previous, next) {
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if (name === 'data-autoresize') {
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this._autoresize = next !== null
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if (!this._textarea) return
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this._updateListener()
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}
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},
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methods: {
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_updateListener: function() {
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if (this._autoresize) {
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this._textarea.addEventListener('input', this._resize)
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this._resize()
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} else {
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this._textarea.removeEventListener('input', this._resize)
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}
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},
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_resize: function() {
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var minHeight = null
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if (this._textarea.style.minHeight) {
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minHeight = parseInt(this._textarea.style.minHeight, 10)
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} else {
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minHeight = parseInt(window.getComputedStyle(this._textarea).minHeight, 10)
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}
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if (minHeight === 0) {
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minHeight = parseInt(window.getComputedStyle(this._textarea).height, 10)
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}
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this._textarea.style.overflowY = 'hidden'
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this._textarea.style.minHeight = minHeight + 'px'
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this._textarea.style.transition = 'none'
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if (this._textarea.scrollHeight > minHeight) {
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this._textarea.style.height = this._textarea.scrollHeight + 'px'
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} else {
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this._textarea.style.height = minHeight + 'px'
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}
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}
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}
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})
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