The body has the margin of margin by default. bodymargin

The body has the margin of margin by default. bodymargin

By default, the body has the margin of margin:
Here is just a fact, that is, the body has a margin by default.
The code example is as follows:

<! DOCTYPE html> 
From the code above, we can see that there is a gap between the box element and the periphery. Let's look at a code example:
<! DOCTYPE html> 
The code above shows that the gap disappears, indicating that the body has an outer margin.
Therefore, before entering the official page, you should reset the style attributes first. For details, see section 1 of css pre-Reset style code.
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