107 lines
3.7 KiB
JavaScript
107 lines
3.7 KiB
JavaScript
// https://forum.vuejs.org/t/how-to-use-helper-functions-for-imported-modules-in-vuejs-vue-template/6266/5
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export default {
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directives: {
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lazy: {
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bind (figure, binding) {
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console.log('directive lazy bind', figure, binding)
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// show only the first image
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if (binding.value === 0) {
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const img = figure.querySelector('img:not(.blank)')
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figure.classList.add('loading')
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img.addEventListener('load', function (e) {
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console.log('img loaded', e)
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figure.classList.remove('loading')
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figure.classList.add('loaded')
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})
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img.addEventListener('error', function (e) {
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console.error('img ERROR', e)
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e.target.classList.remove('loading')
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e.target.classList.add('error')
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})
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img.setAttribute('src', img.getAttribute('data-src'))
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// img.removeAttribute('data-src')
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// img.classList.remove('lazy')
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}
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}
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},
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switcher: {
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inserted (el, binding) {
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// switch images on mousemove
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el.addEventListener('mousemove', function (event) {
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const figs = this.querySelectorAll('figure.loaded')
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// console.log('mousemove', this, event, figs.length)
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// let len = figs.length
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// let w = this.clientWidth;
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// let g = w / len;
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// let delta = Math.floor(event.layerX / g)
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let delta = Math.floor(event.layerX / (this.clientWidth / figs.length))
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delta = delta < 0 ? 0 : delta
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// console.log('delta', delta)
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figs.forEach((fig, index) => {
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// console.log(index)
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if (index === delta) {
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// fig.style.display = "block"
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fig.classList.remove('hide')
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fig.classList.add('show')
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} else {
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// fig.style.display = "none"
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fig.classList.remove('show')
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fig.classList.add('hide')
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}
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})
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})
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}
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}
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},
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mounted () {
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// lazy load images on mouseover
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console.log('card mounted', this.$options.name)
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// if (this.$options.name ==! 'ModalCard') {
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this.activateLazyLoad()
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// }
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},
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updated () {
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// lazy load images on mouseover
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console.log('card updated', this.$options.name)
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// if (this.$options.name ==! 'ModalCard') {
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this.activateLazyLoad()
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// }
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},
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methods: {
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// used by ModalCard
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activateLazyLoad () {
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console.log('card activateLazyLoad', this.$options.name)
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this.$el.addEventListener('mouseover', function (event) {
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const figures = this.querySelectorAll('.images figure.lazy:not(.loaded):not(.loading)')
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console.log('mouseover', this, figures)
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figures.forEach((figure, index) => {
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const img = figure.querySelector('img:not(.blank)')
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// console.log('forEach img',img)
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img.classList.add('loading')
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img.addEventListener('load', function (e) {
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// console.log('img loaded', e)
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figure.classList.remove('loading')
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figure.classList.add('loaded')
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})
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img.addEventListener('error', function (e) {
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console.error('img ERROR', figure, e)
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})
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const src = img.getAttribute('data-src')
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// for debug purpose
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console.log(figures.length, index)
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// let src = img.getAttribute('data-src')
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// if (index > 0 && index < figures.length - 1) {
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// src = img.getAttribute('data-src').replace('?', '/bad?')
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// }
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img.setAttribute('src', src)
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// img.removeAttribute('data-src')
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// img.classList.remove('lazy')
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})
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}, { once: true })
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}
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}
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}
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