I have 3 input elements. i want to use onkeyup event to get the value from the first input and copy it to the third input. But I still get an empty value in the third input when i typed in the first one. The function changethree() does not automatically get value from input second when user typed in input first. Please help me
<html>
<input type="text" id="satu" onkeyup="changetwo(this)" placeholder="input 1">
<br><br>
<input type="text" id="dua" onkeyup="changethree(this)" placeholder="input 2"><br><br>
<input type="text" id="tiga" placeholder="input 3">
<script>
function changetwo(a){
var target = document.getElementById('dua');
target.value = a.value;
}
function changethree(a){
var target = document.getElementById('tiga');
target.value = a.value;
}
</script>
</html>
changethree() only fires when the user types something into dua. If you want tiga to be updated when you type in satu you have to add to its keyup event:
<input type="text" id="satu" onkeyup="changetwo(this); changethree(this)" placeholder="input 1">
Related
How can I set the maxlength attribute in my text input field equal to the value the user enters in the number input field in the same form?
<form action="/action_page.php">
<input id="number" type="number" value="20" max="40">
<input type="text" id="username" name="username" maxlength="10"><br><br>
<input type="submit" value="Submit">
</form>
I'm guessing this maybe requires JavaScript?
You can set the maxlength property on the input event.
document.querySelector("#number").addEventListener("input", function(e){
document.querySelector("#username").maxLength = this.value;
});
<form>
<input id="number" type="number" value="20" max="40">
<input type="text" id="username" name="username" maxlength="20"><br><br>
<input type="submit" value="Submit">
</form>
Yes, this requires JavaScript. You would do something like this:
document.querySelector('#number').addEventListener('input', (e) => {
e.target.closest('form').querySelector('[name="username"]').maxLength = e.target.value;
});
JSFiddle: https://jsfiddle.net/63cpv8rk/
Here, we add an event handler for the input event for the element selected by #number. (You should avoid using these ID attributes though... they clutter up the global scope needlessly.)
Then on input, we find the parent form, and then select the input by name. Finally, we set its max length to the value that was just put in our field.
I'm trying to replace this " with ׳׳ and also this ' with ׳ but it wont work.
function replaceName(e) {
e.value = e.value.replace(/'/g, '׳');
e.value = e.value.replace(/"/g, "׳׳");
}
<input class="form-control" name="name" type="text" onChange="replaceName(this)" />
Better to use oninput than onchange if you want to see changes as user types. onchange is fired when input loses focus, oninput is fired for every input.
function replaceName(e) {
e.value = e.value.replace(/'/g, '׳');
e.value = e.value.replace(/"/g, "׳׳");
}
<input class="form-control" name="name" type="text" oninput="replaceName(this)" />
Input form: I can type random text and get the output in the console, like so: "getWeather.html?city=London:76"
This is the code:
HTML:
<form>
<input type="text" name="city" placeholder="Enter City here..">
<input type="submit" value="Submit">
</form>
javaScript:
var input = $('input')[0].form.city.value;
console.log(input);
However, I would like to get the input directly into a variable. In this case 'London'.
From what i understand, the way you are getting the city value is wrong.
Here I'm using a JQuery selector with an attribute value lookup. The selector basicly says: Look for every input with the attribute name equals to city.
Then i'm using the val() function to get the value. I've added a ev paremeters which is the Javacript event and i have stopped it using ev.preventDefault();. This prevent the page from reloading.
To conclude, I've simply console.log the value.
$('form').on('submit', function(ev) {
ev.preventDefault();
var value = $('input[name=city]').val();
console.log(value);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<input type="text" name="city" placeholder="Enter City here..">
<input type="submit" value="Submit">
</form>
Okay, I have javascript to calculate a dynamic price for an HTML form. The code is as follows:
jQuery("input[name='Amount']").change(function() {
if (isNaN(parseFloat(this.value)) || !isFinite(this.value)) {
jQuery(this).val('');
return false;
}
var calc = parseFloat(this.value) * 0.95;
jQuery(this).parents("form").find("input[name='price']").val(calc);
});
This, with this input:
<input class="irrelevant typeahead" type="text" placeholder="Amount" name="Amount"/>
The javascript takes that value, calculates the price, and I want it to fill this:
<input type="hidden" name="price" value=""/>
I believe my javascript is correct. What do I need to do to the price to make it work?
Make sure you have these items wrapped in a <form> tag.
<form>
<input class="irrelevant typeahead" type="text" placeholder="Amount" name="Amount"/>
<br />
<input type="hidden" name="price" value=""/>
</form>
jQuery("input[name='Amount']").change(function() {
if (isNaN(parseFloat(this.value)) || !isFinite(this.value)) {
jQuery(this).val('');
return false;
}
var calc = parseFloat(this.value) * 0.95;
jQuery(this).parents("form").find("input[name='price']").val(calc);
});
I have a working demo here: http://jsfiddle.net/P55ge/
In the demo I have made the price input a text field instead of a hidden field for ease of seeing the value being set.
Also note, that the field is only updated when you enter a valid number and then click off the field input. The following quote is from the jquery documentation for .change() http://api.jquery.com/change/
Now when the second option is selected from the dropdown, the alert is
displayed. It is also displayed if you change the text in the field
and then click away. If the field loses focus without the contents
having changed, though, the event is not triggered.
I'm working on a site that is full of forms to be filled and I it's required that when escape button is pressed focus move to the next input control, just as pressing "tab" do.
I found code to move focus when keypressed is 13 but this need to take the ID of element to focus on
<input id="Text1" type="text" onkeydown="return noNumbers(event)" />
<input id="Text2" type="text" />
<script type="text/javascript">
function noNumbers(e) {
keynum = e.which;
if (keynum == 13)
document.getElementById("Text2").focus();
}
</script>
I need a generalized function that when key pressed code is 13 "that is enter" fire the default event of pressing 9 "that is tab", of course in Javascript
This will handle multiple input fields.
Here is the jQuery version:
http://jsfiddle.net/TnEB5/3/
$('input').keypress(function(e) {
if (e.which == 13) {
$(this).next('input').focus();
e.preventDefault();
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="Text1" type="text" />
<input id="Text2" type="text" />
<input id="Text3" type="text" />
Here is the pure javascript version:
http://jsfiddle.net/TnEB5/5/
(you probably want to get the sibling differently)
function tab(e) {
if (e.which == 13) {
e.target.nextSibling.nextSibling.focus();
e.preventDefault();
}
}
var inputs = document.getElementsByTagName('input');
for (var x = 0; x < inputs.length; x++)
{
var input = inputs[x];
input.onkeypress = tab;
}
<input id="Text1" type="text" />
<input id="Text2" type="text" />
<input id="Text3" type="text" />
handle keypress instead and return false back to the browser:
http://jsfiddle.net/EeyTL/
<input id="Text1" type="text" />
<input id="Text2" type="text" />
<script type="text/javascript">
document.getElementById('Text1').onkeypress = function (e) {
if (e.which === 13) {
document.getElementById("Text2").focus();
return false;
}
};
</script>
You'll need to explicitly set the tabindex property of the input fields for a generic solution. Something like
<input id="Text1" type="text" tabindex="1" />
<input id="Text2" type="text" tabindex="2" />
<script type="text/javascript">
$('input').keypress(function(e){
if(e.which==13){
$("[tabindex='"+($(this).attr("tabindex")+1)+"']").focus();
e.preventDefault();
}
});
</script>
this solution uses jquery to assign the event handler for all input type elements on the page, sets focus to the element with the next highest tabindex property, and prevents the form from submitting when enter is pressed using e.preventDefault(). Here's a jfiddle
<input type="text" value="" onkeyup="doNext(this);"> a <br>
<input type="text" value="" onkeyup="doNext(this);"> b <br>
<input type="text" value="" onkeyup="doNext(this);"> c <br>
function doNext(el){
if(event.keyCode=='13'){
var nextEl = el.form.elements[el.tabIndex+1];
if (nextEl && nextEl.focus) nextEl.focus();
}
}
Althought the post is old, I hope my answer can help someone in need. I have a smilar situation:
I have a very large form for an employee scheduler application with different types of input fields. Some of the input fields are hidden sometimes and not other times. I was asked to make the enter key behave as the tab key so the users of the form could use the 10-key when creating thier employees schedule.
Here is how I solved my problem:
$(document).ready(function () {
var allInputs = $(':text:visible'); //(1)collection of all the inputs I want (not all the inputs on my form)
$(":text").on("keydown", function () {//(2)When an input field detects a keydown event
if (event.keyCode == 13) {
event.preventDefault();
var nextInput = allInputs.get(allInputs.index(this) + 1);//(3)The next input in my collection of all inputs
if (nextInput) {
nextInput.focus(); //(4)focus that next input if the input is not null
}
}
});
});
What I had to do was:
Create a collection of all the inputs I want to consider when tabbing. in my case it is text inputs that are visible.
Listen for a keydown event on the inputs in question, in my case all text field inputs
When the enter is pressed on my text input, determine what input is next to be focused.
If that input is valid, bring it into focus.
I am using this code for advancing to next input field. I hate to press TAB key. And this solution works in IE & Firefox:
<script type="text/javascript">
function tabE(obj,e){
var e=(typeof event!='undefined')?window.event:e;// IE : Moz
if(e.keyCode==13){
var ele = document.forms[0].elements;
for(var i=0;i<ele.length;i++){
var q=(i==ele.length-1)?0:i+1;// if last element : if any other
if(obj==ele[i]){ele[q].focus();break}
}
return false;
}
}
</script>
HTML Content
<form id="main">
<input name="" type="text" onkeypress="return tabE(this,event)">
<input type="submit" value="Ok">
</form>
Here is a easy solution for you.
Basically you include the enter2tab.js file and then add the enter2tab class on each object where you want enter to be treated as js.
https://github.com/AndreasGrip/enter2tab
You can obviously look at the code to understand what it does and how..
I believe using e.preventDefault(); is safer than returning false.