Question

Now I am developing a bar code based attendance system . Any there any javascript event can solve once the text field has detected the value has 10 characters, the text field will be fired and i can able to get the value.

Is there any solution ?

Answer 1

I’m not sure what you mean by “the text field will be fired”, but you can find out when the 10th character is entered by binding to the keyup event:

document.getElementById("example").onkeyup = function() {
    if(this.value.length === 10) {
        console.log("ok");  
    } 
};

It would be better to use addEventListener or attachEvent rather than setting the onkeyup property, but I’ll leave that up to you.

Here’s a working example.