el-backtop back to the top of the use

Look at my code:

 

The component properties are have default values, it is not necessary to provide any value can be used, such as direct use:

<el-backtop></el-backtop>

it is also fine. Remember this component on the outermost div in the first position, not on the tail!

 

Detailed look at the original site , which is a more thorough analysis.