There is a problem with the label name attribute. Please give me some advice.

Question

<input type="checkbox" name="item[]">Tag 1

<input type="checkbox" name="item[]">Tag 2

<input type="checkbox" name="item[]">Tag 3

......

Questions in the video case course, multiple tags use the same name Naming, that is, name="item[], actually this name is named in the form of an array, so why is "[ ]" empty? How does the browser identify the corresponding tag through the array subscript? Thank you

Answer 1

If the subscript is not written, it will start from 0 by default. If the four arrays are 0 123