效果

封装组件

<template>
    <div ref="container" class="scroll-area">
        <div
            ref="content"
            :class="[isScroll ? 'scroll' : 'no-scroll']"
            :style="{ color: fontColor }"
        >
            {{ content }}
        </div>
    </div>
</template>

.scroll-area {
	position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll {
	position: absolute;
    line-height: normal;
    height: fit-content;
    white-space: nowrap;
    animation: todayScroll linear infinite;
    animation-delay: 0s;
}

.no-scroll {
    line-height: normal;
    width: fit-content;
    height: fit-content;
    -ms-text-overflow: ellipsis;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    max-lines: 1;
}

@-webkit-keyframes todayScroll {
    0% {
        left: 100%; // 首端从右边滚入
    }
    
    100% {
        -webkit-transform: translate(-100%, 0, 0); // 末端从左边滚出
    }
}

@keyframes todayScroll {
    0% {
        left: 100%;
    }
    
    100% {
    	left: 0%;
        transform: translateX(-100%);
    }
}

export default {
    name: 'scrollLine',
    props: {
        content: String,
        minCount: {
            type: Number,
            default: 0
        },
        fontColor: {
            type: String,
            default: 'black'
        }
    },
    data() {
        return {
            isScroll: false
        }
    },
    mounted() {
        if ((this.minCount > 0 && this.content.length > this.minCount) || this.scrollHandler()) {
            this.isScroll = true;
            this.$nextTick(() => {
                const scrollElements = document.getElementsByClassName('scroll');
                if (scrollElements && scrollElements[0]) {
                    const time = parseInt(this.content.length / 4) // 按字数计算滚动一次的时间，以控制速度
                    scrollElements[0].style.setProperty('animation-duration', `${time}s`)
                }
            })
        }
    },
    methods: {
        scrollHandler() {
            if (this.$refs.container && this.$refs.content) {
                const containerWidth = this.$refs.container.clientWidth;
                const contentWidth = this.$refs.content.clientWidth;
                if (containerWidth && contentWidth && contentWidth >= containerWidth) {
                    return true;
                }
            } else {
                return false;
            }
        }
    }
};

调用

<div style="height: 44px; background: #cdebff">
    <marquee-label
        content="滚动内容滚动内容滚动内容滚动内容滚动内容滚动内容滚动内容"
        font-color="#0091fa"
    ></marquee-label>
</div>

可改进处

按字数计算速度，但是没考虑到“汉字”、“字母”、“特殊字符”等所占宽度不同，如果需要速度不变的话可优化