31. JavaScript Objects: Object to Primitive Conversion

#MissXing #JavaScript #JavaScriptObject

What happens when objects are added obj1 + obj2, subtracted obj1 - obj2 or printed using alert(obj)?
There’s no conversion to boolean. All objects are true in a boolean context.
There exist only numeric and string conversions.
The numeric conversion happens when we subtract objects or apply mathematical functions. For instance, Date objects (to be covered in the chapter Date and time) can be subtracted, and the result of date1 - date2 is the time difference between two dates.
As for the string conversion – it usually happens when we output an object with alert(obj)and in similar contexts.

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