看看这个片段。这就是如何overflow-wrap: break-word应该管用：
.wrap{
overflow-wrap: break-word;
}
<div class="wrap">
<div class="a">
first div
</div>
<div class="b">
animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal
</div>
</div>
现在看看如何结合改变其行为display:flex:
.wrap{
overflow-wrap: break-word;
display: flex;
}
<div class="wrap">
<div class="a">
first div
</div>
<div class="b">
animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal
</div>
</div>
如何编辑第二个片段以不显示水平滚动条？ （不使用溢出：隐藏）
Thanks
当你给予display: flex to the wrap，默认情况下的元素a and b are flexed在一条线上。
现在另一个默认的弹性盒子孩子 is the min-width财产是auto默认情况下，所以元素a and b需要一个min-width与其内容相对应。这样设置min-width: 0事情又回到了normal- 请参阅下面的演示：
.wrap {
overflow-wrap: break-word;
display: flex;
}
.b {
min-width: 0; /* ADDED */
}
<div class="wrap">
<div class="a">
first div
</div>
<div class="b">
animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal animal
animal animal animal animal animal animal animal animal animal animal animal animal
</div>
</div>
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