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JavaScript Add and Substract Days

Etiketler: JavaScript Tips

When I visited StackOverflow, I saw a question.

Briefly, he wants to add days to dates. Firstly I checked his codes. Also, his mathematics was wrong.

Anyway, I corrected his codes. I use VanillaJS really. You don’t need any framework or library. I wrote a code with Date object. Especially first function look like an extension of the Date object.

Actually second function unnecessary. You don’t have to use it.


Date.prototype.addDays = function(days) {
  this.setDate(this.getDate() + parseInt(days));
  return this;

function getDate(days) {
  var date = new Date().addDays(days);
  return date

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