5 radio buttons fill up randomly? - javascript

Hi I am trying to make five buttons as you can see and I want a function when you push "click me" it will fill up the five button randomly.
It's like a random generator for stats for a game.
I don't know if I'm doing it all wrong but I think I need some other coding for this.
Can anyone that can help me?
This is what I have:
<button onclick='myFunction()'>click me</button>
<div id="demo">
<Input type = radio Name = r1>
<Input type = radio Name = r2>
<Input type = radio Name = r3>
<Input type = radio Name = r4>
<Input type = radio Name = r5>
</div>
<script type="text/javascript">
function myFunction() {
document.getElementById('demo').innerHTML = '';
var num = 3;
var noOfButtons = Math.floor(Math.random() * num);
console.log(noOfButtons);
for (var i = 0; i < noOfButtons; i++) {
var box = document.createElement();
document.getElementById('demo');
}
}
</script>

not exactly sure what your looking for. I threw this JSFiddle together. Take a look and see if its what you're looking for.
<button id='button1'>click me</button>
<div id="demo">
<input type='radio' id='r1'>
<input type='radio' id='r2'>
<input type='radio' id='r3'>
<input type='radio' id='r4'>
<input type='radio' id='r5'>
</div>
.
var button1 = document.getElementById('button1');
button1.onclick = function () {
var noOfButtons = 5;
var pick = Math.floor(Math.random() * noOfButtons) + 1;
var radioBtn = document.getElementById('r' + pick);
radioBtn.checked = true;
}
[edit]

I think what you're trying to do is randomly check a finite number of radios, in which case there's no need to set demo's html to ''. I added the class myRadios to the tags of your radios (just in case there are other radios on the page that you don't want to include in the random checking), and then used the following function:
function myFunction() {
var radios = document.getElementsByClassName('myRadios');
for (var i=0; i<radios.length; i++)
{
radios[i].checked = ( (Math.random()*10) > 5) ? true : false;
}
}
Here is a a working fiddle. Let me know if this is the functionality you were looking for or if you have any questions about how it works :)

Related

Why can't get input value checkbox in array?

In the code described below, the value of the input should be taken from everyone in the array and a new div with the input value in innerHtml should be created. I don't know why get an error that length.value not defined?
<input type="checkbox" class="checkboxnewdivs" id="checkboxnewdivs" name="checkboxnewdivs" value="divsone">
<input type="checkbox" class="checkboxnewdivs" id="checkboxnewdivs" name="checkboxnewdivs" value="divstwo">
<input type="checkbox" class="checkboxnewdivs" id="checkboxnewdivs" name="checkboxnewdivs" value="divsthree">
<button onclick="myFunction()">Click me</button>
<div id="container"></div>
function myFunction() {
let array = [];
var checkboxnewdivs = document.querySelectorAll('input[name="checkboxnewdivs"]:checked');
for (var i = 0; i < checkboxnewdivs.length; i++) {
var iddivs = array.push(checkboxnewdivs[i].value);
var div_new = document.createElement("DIV");
div_new.innerHTML = "ID div:"+iddivs ;
document.getElementById("container").appendChild(div_new);
}
}
var checkboxnewdivs = document.querySelectorAll('input[name="checkboxnewdivs"]:checked').value;
Should be
var checkboxnewdivs = document.querySelectorAll('input[name="checkboxnewdivs"]:checked');
The first one is trying to get a value property from a node collection, which will obviously be undefined.
You also had some typos (double 's') and don't define array anywhere. Define that where you defined checkboxnewdivs.
Working demo: https://jsfiddle.net/mitya33/m9L2dvz5/1/

How do you make javascript(including function with array and return) write in div on button click without going to another page

I have had a lot of problems with this problem. When I console.log(sum); I get the answer I am looking for, but when I try to output the answer from a button click and an input field it does not work. I changed felt3.innerHTML=addnumber(ttt); to document.write(addnumber(ttt)); which made it work, but it is sending it to another page, which is something I do not want. How I can make this work:
<form id="form3">
Tall:<input type="number" id="number"><br>
<input type="button" id="button3" value="plusse"><br>
</form>
<div id="felt3"></div>
and:
var number = document.getElementById("number");
var felt3 = document.getElementById("tall3");
var form3 = document.getElementById("form3");
var button3 = document.getElementById("button3");
var sum=0;
function addnumber(x){
var array = [];
array.push(x);
for (var i = 0; i < array.length; i++) {
sum=sum+array[i];
}
return sum;
}
button3.onclick=function(){
var ttt=Number(number.value);
felt3.innerHTML=addnumber(ttt);
}
If I understand your question correctly, then the solution here is to update the argument that you are passing to getElementById("tall3"), rewriting it to document.getElementById("felt3");.
Doing this will cause your script to aquire the reference to the div element with id felt3. When your onclick event handler is executed, the result of addnumber() will be assigned to the innerHTML of the valid felt3 DOM reference as required:
var number = document.getElementById("number");
// Update this line to use "felt3"
var felt3 = document.getElementById("felt3");
var form3 = document.getElementById("form3");
var button3 = document.getElementById("button3");
var sum=0;
function addnumber(x){
var array = [];
array.push(x);
for (var i = 0; i < array.length; i++) {
sum=sum+array[i];
}
return sum;
}
button3.onclick=function(){
var ttt=Number(number.value);
// Seeing that felt3 is now a valid reference to
// a DOM node, the innerHTML of div with id felt3
// will update when this click event is executed
felt3.innerHTML=addnumber(ttt);
}
<form id="form3">
Tall:<input type="number" id="number"><br>
<input type="button" id="button3" value="plusse"><br>
</form>
<div id="felt3"></div>

Updating Values in HTML output based on changing input

I currently have a set of fields and radio buttons that take in some user input. Here is an example:
<div id="age">
<input type="number" name="age1" value=60>
</div>
I am displaying all the inputted values and want the display to change when the user modifies the input. This is my attempt:
var inputElements = document.querySelectorAll('input');
for(var i = 0, len = inputElements.length ; i < len ; i++) {
inputElements[i].addEventListener('input', updateDisplay());
}
function updateDisplay () {
console.log("test");
var age = document.querySelector('input[name="age1"]').value;
document.getElementById("ageComparison").innerHTML = age;
}
I know that the program enters the method since the "test" message is printed to the console; however, I don't see any change in display according to changes in input. Would appreciate any help.
While creating the eventlistener, you're just calling updateDisplay. Remove the ().
Also, you did not put '#ageComparison' element in your code.
html:
<div id="age">
<input type="number" name="age1" value=60>
</div>
<div id="ageComparison">
</div>
js:
var inputElements = document.querySelectorAll('input');
for (var i = 0; i < inputElements.length; i++) {
inputElements[i].addEventListener('input', updateDisplay);
}
function updateDisplay() {
console.log("test");
var age = document.querySelector('input[name=age1]').value;
document.getElementById("ageComparison").innerHTML = age;
}
Example: https://jsfiddle.net/m6r871t6/
Try avoiding the inner double quotes
var age = document.querySelector('input[name=age1]').value;
try using
inputElements[i].addEventListener('change', updateDisplay())

When "check-all" box checked, check others

I have a form located on my html page with a bunch of checkboxes as options. One of the options is "check-all" and I want all the other check boxes to be checked, if unchecked, as soon as the "check-all" box is checked. My code looks something like this:
<form method = "post" class = "notification-options">
<input type = "checkbox" name = "notification-option" id = "all-post" onClick = "javascript:checkALL(this
);"> All Posts <br/>
<input type = "checkbox" name = "notification-option" id = "others-post"> Other's Posts <br/>
<input type = "checkbox" name = "notification-option" id = "client-post"> Cilent's Post <br/>
<input type = "checkbox" name = "notification-option" id = "assign-post"> Task Assigned </form>
java script:
<script type = "text/javascript">
var $check-all = document.getElementbyId("all-post");
function checkALL($check-all){
if ($check-all.checked == true){
document.getElementByName("notification-option").checked = true;
}
}
</script>
nothing happens when I run my code
Here are some guidelines.
type attribute is not needed and can be omitted.
JS variable names can't contain hyphens, a typo in
getElementById()
You're using a global variable name as an argument, in the same time
you're passing this from online handler. The passed argument shadows the
global within the function.
if (checkAll.checked) does the job
Typo in getElementsByName(), gEBN() returns an HTMLCollection,
which is an array-like object. You've to iterate through the
collection, and set checked to every element separately.
Fixed code:
<script>
var checkAll = document.getElementById("all-post");
function checkALL(){
var n, checkboxes;
if (checkAll.checked){
checkboxes = document.getElementsByName("notification-option");
for (n = 0; n < checkboxes.length; n++) {
checkboxes[n].checked = true;
}
}
}
</script>
You can also omit the javascript: pseudo-protocol and the argument from online handler.
You can do it like this using jQuery:
$("#all-post").change(function(){
$('input:checkbox').not(this).prop('checked', this.checked);
});
Here is a JSfiddle
if all post check box is checked it will set check=true of others-post and client-post check boxes
$("input[id$=all-post]").click(function (e) {
if ($("input[id$=all-post]").is(':checked')) {
$("input[id$=others-post]").prop('checked', true);
$("input[id$=client-post]").prop('checked', true);
}
});
Check to see if any of the checkboxes are not checked first.
If so, then loop through them and check any that aren't.
Else, loop through them and uncheck any that are checked
I have an example at http://jsbin.com/witotibe/1/edit?html,output
http://jsfiddle.net/AX3Uj/
<form method="post" id="notification-options">
<input type="checkbox" name="notification-option" id="all-post"> All Posts<br>
<input type="checkbox" name="notification-option" id="others-post"> Other's Posts<br>
<input type="checkbox" name="notification-option" id="client-post"> Cilent's Post<br>
<input type="checkbox" name="notification-option" id="assign-post"> Task Assigned
</form>
function checkAll(ev) {
checkboxes = document.getElementById('notification-options').querySelectorAll("input[type='checkbox']");
if (ev.target.checked === true) {
for (var i = 0; i < checkboxes.length; ++i) {
checkboxes[i].checked = true;
}
} else {
for (var i = 0; i < checkboxes.length; ++i) {
checkboxes[i].checked = false;
}
}
}

why are names not being added to the list?

I found this fiddle and I am trying to get it to work...I can not figure out why the names are not being added to the list, for some reason Add button is acting like a submit button and I can not tell why...It should add all the numbers to a list so when I click submit, then it should send the numbers in an array..
JavaScript:
function bindName() {
var inputNames = document.getElementById("names").getElementsByTagName("inputNames");
for (i = 0; i < inputNames.length; i++) {
inputNames[i].onkeydown = function() {
if (this.value == "") {
setTimeout(deletename(this), 1000);
}
}
}
}
document.getElementById("addName").onclick = function() {
var num1 = document.getElementById("name");
var myRegEx = /^[0-9]{10}$/;
var myRegEx = /^[0-9]{10}$/;
var itemsToTest = num1.value;
if (myRegEx.test(itemsToTest)) {
var form1 = document.getElementById("names");
var nameOfnames = form1.getElementsByTagName("inputNames").length;
var newGuy1 = document.createElement("inputNames");
newGuy1.setAttribute("id", nameOfnames);
newGuy1.setAttribute("type", "text");
newGuy1.setAttribute("value", num1.value);
form1.appendChild(newGuy1);
num1.value = "";
bindName();
}
else {
alert('error');
}
};
HTML:
<h1>Enter Name</h1>
<div id="mainName">
<h2>name</h2>
<label for="name">Add Names: </label>
<input id="name" type="text">
<button id="addName">Add</button>
<form>
<div id="names">
</div>
<input METHOD="POST" action="text.php" type="submit" value="Submit">
</form>
</div>
I've seen
document.createElement("inputNames");
Shouldn't be
document.createElement("input");
?
Because this /^[0-9]{10}$/; will accept only 10 numbers and only that, try entering 1234567890 and you will see no error.
I'm not sure why your "name" field is restricted to 10 digit numbers, but I've got the thing to work.
http://jsfiddle.net/y8Uju/4/
I think the problem was that you were trying to create an element with the tag name inputNames, but that's not a valid tag. Instead I changed it to create inputs, and set the class to inputNames.

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