How to know the specific position in a String of a key pressed in the Keypress Event [duplicate]

Question

I don't know if it is possible but i need to know the specific position where an character was entered using javascript. For example:

I have: 162345.25, if I want to entering another 6 number, between three and four numbers (1623645.25), I need to know in what position was entered (In this case, is the fifth position).

My problem is that I need to know that in the "keypress" event and I just can catch the key pressed. Somebody knows if it is possible?

In that case, someone is using the keyup event.. In my case, I need to do that using keypress event. — Luis
– Luis, Commented Apr 12, 2019 at 21:04

junvar · Accepted Answer · 2019-04-12 20:55:17Z

6

let x = document.getElementById('x'); x.addEventListener('keypress', () => console.log(x.selectionStart));

<input id='x'>

The keypress event won't know the cursor position. But if you have a specific element you're interested in, you can get element.selectionStart.

answered Apr 12, 2019 at 20:55

junvar

11.7k2 gold badges35 silver badges52 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Jibin Joseph Over a year ago

This doesn't seem to work with <input type="number" />

junvar Over a year ago

@JibinJoseph, you're right, apparently, this is an intended limitation for number inputs. See stackoverflow.com/questions/21177489/…

mbojko · Accepted Answer · 2019-04-12 20:54:34Z

Can you store the input's previous value (one value will be enough)? If so, then you can simply calculate the position of first difference between the new value and the old one.

Collectives™ on Stack Overflow

How to know the specific position in a String of a key pressed in the Keypress Event [duplicate]

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related