I've got this code:

1. if (returneddata.daterangeparams.TimeUnitsFrom != null) {

...which throws this error (as seen in the Chrome Dev Tools console) when the value is, indeed, null:

Index:1031 Uncaught TypeError: Cannot read property 'TimeUnitsFrom' of null

So how can I check for null in a way that I can avoid the error?

Based on a suggestion here, I even tried this:

1. if (returneddata.daterangeparams.TimeUnitsFrom != null && variable !== undefined) {

...but I still get the same whinging from the guts of the browser.

Code in greater context:

1. function populatedaterangeprams(rptval, returneddata) {
                       var fromval = '';
                       var toval = '';
                       if (returneddata.daterangeparams.TimeUnitsFrom != null && 
   
   
   returneddata.daterangeparams.TimeUnitsFrom !== undefined) {
                           fromval = returneddata.daterangeparams.TimeUnitsFrom;
                       }
                       if (returneddata.daterangeparams.TimeUnitsTo != null && 
   
   
   returneddata.daterangeparams.TimeUnitsTo !== undefined) {
                           toval = returneddata.daterangeparams.TimeUnitsTo;
                       }
   
   
                       if (rptval === 1) {
                           // Produce Usage
                           $("#produsagefrom").val(fromval);
                           $("#produsageto").val(toval);
                       } else if (rptval === 2) {
   . . .

So how can I safely check for null?