Add the following lines to your i3blocks config file at 
/home/USER/.config/i3blocks/config
<pre><code>[onclick] 
full_text=⏻
command=clear
command=i3-nagbar -t warning -m 'Logout i3.' -B 'Yes exit i3' 'i3-msg exit' 1&gt; /dev/zero
</code></pre>

Add the following lines to your i3blocks config file at 

/home/*USER*/.config/i3blocks/config





```
[onclick]                                                                      
full_text=⏻
command=clear
command=i3-nagbar -t warning -m 'Logout i3.' -B 'Yes exit i3' 'i3-msg exit'  1> /dev/zero

``` 









Power Off Button in i3blocks in i3wm