flex最后一行左对齐

<div class="container">
    <div class="list"></div>
    <div class="list"></div>
    <div class="list"></div>
    <div class="list"></div>
    <div class="list"></div>
    <div class="list"></div>
    <div class="list"></div>
</div>

.container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.list {
    background-color: skyblue;
    margin: 10px;
}
/* 使用伪元素辅助左对齐 */
.container::after {
    content: '';
    flex: auto;    /* 或者flex: 1 */
}