dist/oauth-ng.js
function (jsonS) {
    var jws = KJUR.jws.JWS;
    if(jws.isSafeJSONString(jsonS)) {
      return jws.readSafeJSONString(jsonS);
    }
    return null;
  }
function (jsonS) {
    var jws = KJUR.jws.JWS;
    if(jws.isSafeJSONString(jsonS)) {
      return jws.readSafeJSONString(jsonS);
    }
    return null;
  }
function ( jsonS ) { var jws = KJUR . jws . JWS ; if ( jws . isSafeJSONString ( jsonS ) ) { return jws . readSafeJSONString ( jsonS ) ; } return null ; }
Get the JSON object from the JSON string
@param {string} jsonS    JSON string
@returns {object|null}   JSON object or null
Get the JSON object from the JSON string