learnin-some-vue/s10QuoteApp/src/App.vue

<template>
    <div class="container">
        <app-header :quoteCount="quotes.length" :maxQuotes="maxQuotes"></app-header>
        <app-new-quote  @newQuote="newQuote"></app-new-quote>
        <hr>
        <app-quote-grid :quotes="quotes" @quoteDelete="deleteQuote"></app-quote-grid>
        <div class="row">
            <div class="col-sm-12 text-center">
                <div class="alert alert-info">click a quote to delete it.</div>
            </div>
        </div>
    </div>
</template>

<script>
    import QuoteGrid from './components/QuoteGrid.vue'
    import NewQuote from './components/NewQuote.vue'
    import Header from './components/Header.vue'

    export default {
        data(){
            return {
                maxQuotes: 10,
                quotes: ["Just a quote to see something"],
            };
        },
        components: {
            appQuoteGrid: QuoteGrid,
            appHeader: Header,
            appNewQuote: NewQuote,
        },
        methods: {
            newQuote(quote) {
                if (this.quotes.length >= this.maxQuotes){
                    return alert('Please delete quotes first');
                }
                this.quotes.push(quote)
            },
            deleteQuote(index){
                this.quotes.splice(index, 1)
            }
        },
    }
</script>

<style>
</style>