<!-- 遮罩层 -->
<div class='container'>
    <div v-if='loading' class='overlay'>
        <div class='loading-spinner'>
        </div>
    </div>
</div>

        //控制

loading: false,

<style scoped>

btn {
    width: 77px;
    display: flex;
    justify-content: space-evenly;
    margin-top: 10px;
}

.container {
    position: relative;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #fff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

</style>