Javascript string replace on non numeric and letter s

Question

var value = document.getElementById("height_"+ rowCount).value;
value = value .replace("a", "");
document.getElementById("height_"+rowCount).value = value;

Above is a javascript example that I used to replace the letter "a" in my text field height_row e.g height_1 (for row 1)

I want to able to filter all input except

0 to 9, letter s, how do I auto replace all input with blank if its not number 0 to 9 or letter "s"

Thanks for helping

Look into regular expressions

Bergi
– Bergi

2014-10-22 20:28:44 +00:00
Commented Oct 22, 2014 at 20:28 — Bergi
– Bergi, Commented Oct 22, 2014 at 20:28

Paul Roub · Accepted Answer · 2014-10-22 20:28:23Z

2

Use a regular expression:

var rowCount = 1;

var value = document.getElementById("height_"+ rowCount).value;
value = value.replace(/[^0-9s]/g, "");
document.getElementById("height_"+rowCount).value = value;

<input type="text" value="one 1 two 2 three 3 numbers" id="height_1" />

answered Oct 22, 2014 at 20:28

Paul Roub

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2 Comments

Baoky chen Over a year ago

How do we modify the code such that when the textfield will replace all the char that doesn't match the "pattern" instantly after a letter is type

Paul Roub Over a year ago

That's a different question. See, for example: stackoverflow.com/questions/6763012/…

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