JavaScript converts objects to primitive values by calling the valueOf method, and we rarely need to call the valueOf method ourselves. When an object with an expected primitive value is encountered, ...

The valueOf() method of {{jsxref("String")}} values returns this string value. The valueOf() method of {{jsxref("String")}} returns the primitive value of a {{jsxref ...

Date() setMonth() getDate() setFul­lYear() getDay() setHours() getMonth setMin­utes() getFul­lYear setSec­onds() getYear setMil­lis­eco­nds() getHours setTime() getMinutes setUTC­Date() getSeconds ...