Textarea宽度与包含div不对齐

    .textarea-container {
        width: 300px;
        display: inline-block;
    }
    textarea {
        width: 100%;
        box-sizing: border-box;
    }
</style>
<div class="textarea-container">
   <textarea></textarea>
</div>

    .container {
        display: flex;
        align-items: center;
    }
    textarea {
        flex-grow: 1;
        box-sizing: border-box;
    }
</style>
<div class="container">
    <div>Label:</div>
   <textarea></textarea>
</div>

textarea {
    box-sizing: border-box;
}

textarea {
    transform: translateY(-1px);
}