JavaScript calculates how the day of the week is _javascript tips

This example describes how JavaScript calculates the day of the week. Share to everyone for your reference. Specifically as follows:

JavaScript calculates the day of the week, the text box is the default value, as long as the date in this format, you can calculate the day is the days of the week, a simple JS time calculation example, run this effect, just click the "Calculation" button to show the effect, So we can quickly know what day of the week it is.

The Operation effect chart is as follows: