use shortcode in javascript function

am using shortcode inside javascript it is working fine.
when i am suppose to send dynamic parameter to that shortcode it is taking that dynamic parameter as string . it is not going properly .how can i use it.

example:(inside javascript)
var x= 1;
“[shortcode text=1]” it is going properly
“[shortcode text=” + x + “]” this not taking parameter as 1, it is taking as + x+;

please give me a solution

https://wordpress.org/plugins/shortcode-exec-php/