marc-leopold/components/BackgroundImagePreloader.vue

76 lines
1.5 KiB
Vue

<template>
<BackgroundImageLoader :image-url="imageUrls[activeIndex]"
@imageLoaded="handleImageLoaded"
>
<template slot="overlay">
<slot name="overlay"></slot>
</template>
</BackgroundImageLoader>
</template>
<script>
import imageLoader from '~/mixins/imageLoader.js'
import BackgroundImageLoader from '@/components/BackgroundImageLoader'
export default {
components: {
BackgroundImageLoader,
},
mixins: [ imageLoader ],
props: {
imageUrls: {
type: Array,
required: true,
},
activeIndex: {
type: Number,
required: false,
default () {
return 0
}
}
},
data () {
return {
currentlyLoadingIndex: 1,
errorUrls: [],
}
},
mounted () {
if (this.imageUrls.length > 1) {
this.preloadImage()
}
},
methods: {
preloadImage () {
this.loadImage(this.imageUrls[this.currentlyLoadingIndex])
.then(img => {
this.$emit('imageLoaded', img.src)
console.log('imageloaded', img)
this.currentlyLoadingIndex++
if (this.currentlyLoadingIndex < this.imageUrls.length) {
this.preloadImage()
}
})
.catch(err => {
// TODO handle error cases
console.log('imageloaded ERROR', img.src)
})
},
handleImageLoaded (img) {
this.$emit('imageLoaded handler', img.src)
}
}
}
</script>
<style lang="scss" scoped>
</style>