网址:https://www.w3schools.com/tags/tag_label.asp
label能够为下列HTML元素定义标签:
使用label的两个收益:
Screen reader users (will read out loud the label, when the user is focused on the element)
当用户focus在被label标签修饰的元素上时,Screen reader能够读出标签的文本
Users who have difficulty clicking on very small regions (such as checkboxes) - because when a user clicks the text within the element, it toggles the input (this increases the hit area).
假设checkbox被label修饰,通常checkbox都是屏幕的狭小区域,如果用户对点击这种狭小区域感到困难,那么点击label文本,能达到同样的效果,即label的音乐,扩大了hit area的范围。