Created for the article: https://medium.com/@cagcak/a-common-story-of-reusable-cross-platformvuejs-component-library-ecaf86a0e35d

AboutModal.vue

<template>
    <transition name="about-modal">
        <div class="about-modal-mask" :style="maskBackgroud">
            <div class="about-modal-wrapper">
                <div
                    class="about-modal-container"
                    :style="modalStyles"
                    :class="`modal__${position}`"
                >
                    <div class="about-modal-header" v-if="header">
                        <slot name="header">
                            <div
                                v-html="infoHeaderContent"
                                :style="headerStyles"
                            ></div>
                        </slot>
                    </div>
                    <div class="about-modal-body" v-if="body">
                        <slot name="body">
                            <div
                                v-html="infoBodyContent"
                                :style="bodyStyles"
                            ></div>
                        </slot>
                    </div>
                    <div class="about-modal-footer" v-if="footer">
                        <slot name="footer">
                            <div
                                v-html="infoFooterContent"
                                :style="footerStyles"
                            ></div>
                        </slot>
                        <button
                          class="warning about-modal-default-button"
                          @click="$emit('close')"
                        >
                            {{ buttonText }}
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </transition>
</template>

<script>

const defaultModalStyles = {
    left: 0,
    right: 0,
    backgroundColor: '#333'
}
const defaultModalHeaderStyles = {
    color: '#000'
}
const defaultModalBodyStyles = {
    color: '#111'
}
const defaultModalFooterStyles = {
    color: '#222'
}

export default {
    name: 'AboutModal',
    props: {
        header: {
            type: Boolean,
            default: true
        },
        body: {
            type: Boolean,
            default: true
        },
        footer: {
            type: Boolean,
            default: true
        },
        position: {
            type: String,
            default: 'center',
            validator (position) {
                return ['top', 'bottom', 'center'].indexOf(position) > -1
            }
        },
        modalStyle: {
            type: Object,
            default: () => ({})
        },
        headerStyle: {
            type: Object,
            default: () => ({})
        },
        bodyStyle: {
            type: Object,
            default: () => ({})
        },
        footerStyle: {
            type: Object,
            default: () => ({})
        },
        maskBackgroud: {
            type: Object,
            default: () => ({
                backgroundColor: 'rgba(51, 51, 51, 0.82)'
            })
        },
        infoHeader: {
            type: String,
            default: '<div>No Header</div>'
        },
        infoBody: {
            type: String,
            default: '<div>No Body</div>'
        },
        infoFooter: {
            type: String,
            default: '<div>No Footer</div>'
        },
        buttonText: {
            type: String,
            default: 'Tamam'
        }
    },
    data () {
        return {
            infoHeaderContent: this.infoHeader,
            infoBodyContent: this.infoBody,
            infoFooterContent: this.infoFooter,
            modalStyles: {
                ...defaultModalStyles,
                ...this.styles
            },
            headerStyles: {
                ...defaultModalHeaderStyles,
                ...this.headerStyle
            },
            bodyStyles: {
                ...defaultModalBodyStyles,
                ...this.bodyStyle
            },
            footerStyles: {
                ...defaultModalFooterStyles,
                ...this.footerStyle
            }
        }
    },
    mounted () {
        if (
            Object.keys(this.$store.state.data).length !== 0 &&
            Object.keys(this.$store.state.data.app).length !== 0 &&
            Object.keys(this.$store.state.data.app.about).length !== 0
        ) {
            if (this.infoHeader === undefined || this.infoHeader === '') {
                this.infoHeaderContent = this.$store.state.data.app.about.header
            } else {
                this.infoHeaderContent = this.infoHeader
            }
            if (this.infoBody === undefined || this.infoBody === '') {
                this.infoBodyContent = this.$store.state.data.app.about.body
            } else {
                this.infoBodyContent = this.infoBody
            }
            if (this.infoFooter === undefined || this.infoFooter === undefined) {
                this.infoFooterContent = this.$store.state.data.app.about.footer
            } else {
                this.infoFooterContent = this.infoFooter
            }
        }
    }
}
</script>

<style lang="scss">
$_overlay: #345;
$primary: turquoise;
$warning: yellow;

.modal__top {
    top: 0;
}
.modal__bottom {
    bottom: 0;
}
.modal__center {
    margin: 0 auto;
}
.about-modal-mask {
    position: fixed;
    z-index: 9998;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: $_overlay;
    display: table;
    transition: opacity .3s ease;
}
.about-modal-wrapper {
    display: table-cell;
    vertical-align: middle;
}
.about-modal-container {
    width: 50%;
    overflow: auto;
    margin: 0px auto;
    padding: 20px 30px;
    border-radius: 2px;
    background-color: $primary;
    box-shadow: 0 2px 8px $_overlay;
    transition: ease-in-out 1s all;
    font-family: Helvetica, Arial, sans-serif;
}
.about-modal-header h3 {
    color: $warning;
    margin-top: 0;
}
.about-modal-body {
    margin: 20px 0;
}
.about-modal-default-button {
    float: right;
}
.about-modal-enter {
    opacity: 0;
}
.about-modal-leave-active {
    opacity: 0;
}
.about-modal-enter .about-modal-container,
.about-modal-leave-active .about-modal-container {
    transform: scale(1.1);
}
</style>