How Can I Calculate Time Differences Between Two Times Inputted via Javascript Text Boxes?

Determine Time Delta Using Javascript Text-Boxes

In many applications, it can be essential to calculate the time difference between two specified periods. In Javascript, this task can be accomplished with relative ease using two text-boxes.

To achieve this, one can employ the Date object's subtraction capability. By defining two Date objects with specified times derived from the text-boxes, the difference can be obtained. However, for cases where the times span opposite sides of midnight, an adjustment must be made to ensure an accurate calculation.

To illustrate, consider the following code snippet:

let time1 = "09:00";
let time2 = "17:00";

let date1 = new Date(`2000-01-01T${time1}Z`);
let date2 = new Date(`2000-01-01T${time2}Z`);

if (date2 < date1) {
  date2.setDate(date2.getDate() + 1);
}

let diff = date2 - date1;
console.log(diff);

In this example, a time difference of "28800000" milliseconds (8 hours) is calculated and logged to the console. By leveraging this technique, you can effectively determine the time delta between user-provided intervals within your Javascript applications.

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