JSFiddle - React, Tailwind, and code Playground

JavaScript

var jsonStr = {"cols":[
{"id":"r","label":"Reason","type":"string"},
{"id":"m","label":"Minutes","type":"number"}
],
"rows":[
{"c":[
     {"v":"Flour - Blower","f":"Flour - Blower"},
     {"v":"7","f":"7"}]},
{"c":[
     {"v":"Whole Line - d","f":"Whole Line - d"},
     {"v":"4","f":"4"}]},
{"c":[
     {"v":"Flour - Pipework","f":"Flour - Pipework"},
     {"v":"3","f":"3"}]},
{"c":[
     {"v":"Horseshoe - Belt","f":"Horseshoe - Belt"},
     {"v":"1","f":"1"}]}
],
"p":null
};
jsonStr = JSON.stringify(jsonStr);
jsonStr = jsonStr.replace(/"v":"(\d+)"/g, '"v":$1');
console.log(jsonStr);