regular expression add double quotes around values and keys in javascript

Question

i need a valid JSON format to request ES. i have a string like

{ 
time:  { 
          from:now-60d,
          mode:quick,
          to:now } 
}

Answer 1

maybe you can use :

str.replace(/([a-zA-Z0-9-]+):([a-zA-Z0-9-]+)/g, "\"$1\":\"$2\"");

Here is regex demo

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Note

In the group [a-zA-Z0-9-] of characters i use alphabetical digits and a -, maybe you need other so you can use another one