The difference between display:inline style of div and span_Experience exchange

Doesn’t it mean that using display:lnline will become an inline element? Why is it different from span?
What’s even weirder is that there is no difference when executing in ff

<span style="background-color:red;">xxx</span> <span style="background-color:red;">xxx</span> <div style="background-color:red;display:inline">xxx</div> <div style="background-color:red;display:inline">xxx</div> <span style="background-color:red;">I have no intervals</span><span style="background-color:red;">Great hutia, dig hahaha</span>
[Ctrl A Select all Note:If you need to introduce external Js, you need to refresh it before executing]

The carriage return in IE is treated as a space, hahaha