remove quotes around ONLY numeric values in string

Question

var arr= '[{"a":"b","c":"521"}]';

let ds = arr.replace(/"(\d)"/g,"$1");

alert(ds);

Sample; I have tried the above along with various others.. cannot seem to get this to take effect on numeric values only..

Desired result would be:

[{"a":"b","c":521}]

ie

    let dss = JSON.stringify(arr);
    let ds = dss.replace(/"(\d)"/g,"$1");

Answer 1

I'd parse the JSON and use a reviver function to replace digit strings with just the digits:

 var arr= '[{"a":"b","c":"521"}]'; const parsed = JSON.parse( arr, (key, value) => typeof value === 'string' && /^\\d+$/.test(value) ? Number(value) : value ); console.log(JSON.stringify(parsed));

Answer 2

let ds = arr.replace(/"(\d+)"/g,"$1");

在\\d之前添加+就像： (\\d+)

Answer 3

Your regular expression is looking for one digit add a + for one or more

 var arr= '[{"a":"b","c":"521"}]'; let ds = arr.replace(/"(\\d+)"/g,"$1"); console.log(ds);