get_item test if null in Javascript model

Question

I've a lookup additional column and alerting its value in Javascript as:

var oPicture = oListItem.get_item("Image_x003A_People").get_lookupValue()

If I dont add any data in the column it errors, how can this be tested to prevent the error.

Thanks

Answer 1

Use an IF condition to check whether lookup field contains value or not. Example:

if (oListItem.get_item('Image_x003A_People')) {
    alert(oListItem.get_item('Image_x003A_People').get_lookupValue());
}