在javascript中使用变量的值？

Question

I'm trying to do a WEB based power management system and I'm using PLC Siemens S7-1200. I want to use some tags from PLC in javascript to build a chart. When I use:

var chartData = [{
    country: "USA",
    visits: 230
}, ];

In chart code this works fine.

Now I want to use instead of the fixed numeric value "230" a variable value with the label "Voltage" as tag in the PLC. How can I do this?

Answer 1

If you have the value in the variable voltage , just use that variable in the object:

var chartData = [{
    country: "USA",
    visits: voltage
} ];

DEMO