Is it possible to utilize TypeScript code to dynamically update the JSON filter with variable values?

I am dealing with a JSON filter in which the value for firmwareversion needs to be replaced with a dynamic value. Here's how I've set it up:

//JSON filter
this.comX200FilterValue = '{ "deviceType": "ComX", "firmwareVersion": "3.5.15" }';

// This method retrieves the dynamic firmwareVersion value as 3.5.15
          this.deviceService.getFirmwareversion(config.GlobalConstants.Default.comx200Name)
            .then((fwArray: any) => {
              var Com200FirmwareValue = (fwArray[config.GlobalConstants.Default.comx200Name]);
            })

My goal is to replace the filter string (firmware version value : 3.5.15) with the value of Com200FirmwareValue, like so: "firmwareVersion": "Com200FirmwareValue".

Is there a way to achieve this? Any recommendations or suggestions would be greatly appreciated :)

javascriptajaxtypescriptknockout.js

Answer №1

By utilizing JSON.parse, you have the ability to modify the object as needed. When you're ready to convert it back to a string, use JSON.stringify.

// original string
this.comX200FilterValue = '{ "deviceType": "ComX", "firmwareVersion": "3.5.15" }';
console.log(comX200FilterValue);

// transform into a JSON object and update firmwareVersion
var jsonFilterValue = JSON.parse(this.comX200FilterValue);
jsonFilterValue.firmwareVersion = "Com200FirmwareValue";

// save the updated stringified version back to the original value
this.comX200FilterValue = JSON.stringify(jsonFilterValue);
console.log(comX200FilterValue);

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