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前言

这里不能使用justify-content: center;，因为在小屏幕上，这种方式无法显示最前面的两个tabBar。

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html

<div id="box" class="d_f o_a mt_50 mb_50 ml_20 mr_20"><div class="ws_n">tabBar 1</div><div class="ws_n ml_20">tabBar 2</div><div class="ws_n ml_20">tabBar 3</div><div class="ws_n ml_20">tabBar 4</div><div class="ws_n ml_20">tabBar 5</div><div class="ws_n ml_20">tabBar 6</div><div class="ws_n ml_20">tabBar 7</div><div class="ws_n ml_20">tabBar 8</div><div class="ws_n ml_20">tabBar 9</div>
</div>

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style

#box {& :first-child {margin-left: auto;}& :last-child {margin-right: auto;}
}

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效果

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