HTML - CSS Link Order -

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I came to the CSS link order in the html file from codecademy. I just can not get the logic linking of CSS files. Why do we have to link files according to this order below? Is it related to any programming, where we first have to define the header file in which the functions are included before using them? Does this argument apply to the addition of a CSS file? Can anyone provide a comprehensive explanation for this question? : D 

  & lt; Head & gt; & Lt; Link href = "http://s3.amazonaws.com/codecademy-content/courses/ltp/css/shift.css" rel = "stylesheet" & gt; & Lt; Link rel = "stylesheet" href = "http://s3.amazonaws.com/codecademy-content/courses/ltp/css/shift.css" & gt; & Lt; Link rel = "stylesheet" href = "main.css" & gt; & Lt; / Head & gt;

What is the order of the elements inside the link element? For example & lt; Link href = "" rel = "" & gt; And & lt; Link rel = "" href = "" & gt; , what is the effect of being a href in comparison with rel?

From:

Finally, sort the specified: if two The weight, annihilation and exclusivity of the announcements, is the victory that is given later. Announcement in imported style sheets is understood before any announcement in style sheets.

The order of the order, because when the rules are opposed, there is one factor in determining who wins.


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