How to get text of an input text box during onKeyPress?

Keep it simple. Use both onKeyPress() and onKeyUp():

<input id="edValue" type="text" onKeyPress="edValueKeyPress()" onKeyUp="edValueKeyPress()">

This takes care of getting the most updated string value (after key up) and also updates if the user holds down a key.

jsfiddle: http://jsfiddle.net/VDd6C/8/


Handling the input event is a consistent solution: it is supported for textarea and input elements in all contemporary browsers and it fires exactly when you need it:

function edValueKeyPress() {
    var edValue = document.getElementById("edValue");
    var s = edValue.value;

    var lblValue = document.getElementById("lblValue");
    lblValue.innerText = "The text box contains: " + s;
}
<input id="edValue" type="text" onInput="edValueKeyPress()"><br>
<span id="lblValue">The text box contains: </span>

I'd rewrite this a bit, though:

function showCurrentValue(event)
{
    const value = event.target.value;
    document.getElementById("label").innerText = value;
}
<input type="text" onInput="showCurrentValue(event)"><br>
The text box contains: <span id="label"></span>

Tags:

Javascript

Html

Input

Onkeypress

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