Develop Reference

Showing input fields based on user choice (select)

So I have select on my page and based on user choice I want to show that amount of input fields to him and then do something with it in php script.
It looks like this:
https://i.imgur.com/RlYySko.png
And if user chooses 3 then 3 input fields should appear if 2 then 2 etc. without reloading page. What should be used here any js or something?

Assuming you have an already existing form f, you could create the input elements dynamically by looping x times where x is the selected number of inputs required, so something like
for ( var i=0;i<x;i++){
var inputText = document.createElement("input"); //input element, text
inputText.setAttribute('type',"text");
inputText.setAttribute('name',"mark" + i);
f.append(inputText);
}

Here's a snippet, you can run and check it. It also preserves inputs values in case of number of inputs reduce.
var inputNumber = document.getElementById('input-number');
inputNumber.addEventListener('change', changeNumberOfInputs);
function changeNumberOfInputs(event) {
var desiredInputs = parseInt(event.target.value);
var inputsForm = document.getElementById('inputs-form');
var actualInputs = inputsForm.getElementsByTagName('input').length;
if(actualInputs < desiredInputs) {
for(var i=0; i<(desiredInputs - actualInputs); i++) {
inputsForm.appendChild(document.createElement('input'));
}
}
else if(actualInputs > desiredInputs) {
for(var i=0; i<(actualInputs - desiredInputs); i++) {
var lastInput = inputsForm.getElementsByTagName('input');
lastInput = lastInput[lastInput.length - 1];
inputsForm.removeChild(lastInput);
}
}
}
<select id="input-number">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
<form id="inputs-form">
<input />
</form>

What you want to do, is to create all 6 of the Input fields. Then hide them all as standard, and do document.getElementById(id).style to get the style. Then call a function when the Select changes, and use the selected value to uncover the hidden inputs!
As #Arthur Cantarela stated, this is a bad practice in JS.
Alternatively, you could put them in a div, and change the div's innerHTML according to how many you need!

You could use ng-repeat in angularjs and bind the number select to the repeat expression.

javascript select box values not updating

I'm hoping you can please help.
I have the following HTML code:
<select id='bonus1frequency'>
<option value="0">Annual</option>
<option value="1">Half Yearly</option>
<option value="2">Quarterly</option>
</select>
Depending on what option is selected, fields are displayed in a divider. For example if you select annual, a field to enter annual bonus is displayed. If you select 'Half Yearly' two fields to enter two half yearly bonuses are displayed.
The trouble I'm having is that if you select 'Half yearly' for example, then enter what the half yearly bonus into the fields, then you change your mind and decide you want to enter an annual bonus instead, the values that you enter into the half yearly bonus are retained. I need them to be set to zero when you switch between options in the html select box.
I tried the following code to help with this but it's not working and i'm not sure why. All it does is prevent me from putting anything at all into the half year boxes.
var bonus_val_1 = document.getElementById("bonus1frequency");
var strUser = bonus_val_1.options[bonus_val_1.selectedIndex].value;
if (strUser = "0") //if annual bonus is selected
{
document.getElementById("halfyear_bonus_one").value = 0.00;
}
Edit:
I'm using the following JQUERY in the main HTML document to actually switch what fields are displayed when the user selects each option. So if the user selects option value 0 'annual' in the select box, the following code will show the annual bonus divider containing the annual bonus field, and hide the dividers that show half yearly and quarterly bonus fields.
Based on comments about how I need to tie resetting these fields to the change event, I just thought maybe I can reset the fields to zero within the following jquery code. However I'm even less familiar with JQUERy and not sure how to do that...any help would be much appreciated.
$('#bonus1frequency').on('change', function() {
if ( this.value == '0')
//.....................^.......
{
$("#annual").show();
$("#halfyearly").hide();
$("#quarterly").hide();
}
if ( this.value == '1')
//.....................^.......
{
$("#annual").hide();
$("#halfyearly").show();
$("#quarterly").hide();
}
EDIT 2
I have updated the code as follows:
$('#bonus1frequency').on('change', function() {
if ( this.value == '1')
//.....................^.......
{
$("#annual").show();
$("#halfyearly").hide();
$("#quarterly").hide();
$("#halfyear_bonus_one").val("0");
This prevents me from entering a value into the halfyear bonus one field. It just keeps resetting the value to zero. I've added an empty 'choose' option to the select box but it hasn't made a difference. Any ideas?

Please refer following for help and add code for quarterly. Use jquery instead of using javascript code to get elements.
<select id="bonus1frequency">
<option value="0">Annual</option>
<option value="1">Half Yearly</option>
<option value="2">Quarterly</option>
</select>
<div id="annual" style="display: none;">
<input type="text" id="a1">
</div>
<div id="half" style="display: block;">
<input type="text" class="b2">
<input type="text" class="b2">
<script>
$('#half').hide()//Same as this hide quarterly div
$("#bonus1frequency").change(function(){
var strUser = $(this).val()
if (strUser === "0") //if annual bonus is selected
{
$('#annual').show()
$('#half').hide()
$(".b2").val(0);
}else{
$('#half').show()
$('#annual').hide()
$('#a1').val(0)
}
})
</script>
</div>

The problem with your code is that you're not binding it to the select's change event. It will run when loading the page, and since the default option in the dropdown is "Annual", the value which will appear as the value of #halfyear_bonus_one would be 0.00 and won't change, even if the user will choose another option in the dropdown.
You should create a js function which contain your code (with few corrections)
and then bind it to a change event of the dropdown.
Moreover, you should add conditions to handle the other scenarios: "half yearly" and "quarterly".
var bonusval1 = document.getElementById("bonus1frequency");
bonusval1.onchange = function () {
var strUser = bonusval1.options[bonusval1.selectedIndex].value;
if (strUser == "0"){ //if annual bonus is selected
document.getElementById("halfyear_bonus_one").value = "0.00";
} else if(strUser == 1){ //Half yearly is selcted
document.getElementById("halfyear_bonus_one").value = "1.00";
} else { //quertly is selected
document.getElementById("halfyear_bonus_one").value = "2.00";
}
}
Now, there's another problem - the default value is the first value - but the "onchange" event won't trigger. We can run the function outside of the onchange event in order to handle the default value or you can add a blank option to the dropdown as the first option, something like "Choose:" or whatever.
Jsfiddle
Regarding the second question
I didn't understand why would you use jQuery all of a sudden when you already
wrote pretty good js code. Those kind of decisions should be considered in the beginning of the process.
Anyway, You can use the .val() function to change the value of the input fields. I don't have the code of your form and the dividers but it should be pretty much like the following:
if ( this.value == '0')
//.....................^.......
{
$("#annual").show();
$("#halfyearly").hide();
$("#quarterly").hide();
$("#id_of_input_for_halfyearly").val("0");
$("#id_of_input_for_quarterly").val("0");
}

I think this will help you out.
jQuery('#bonus1frequency').on('change',function(){
if(this.value==1){
jQuery('.yearly').val('').show();
jQuery('.half-yearly').val(0).hide();
jQuery('.quarterly').val(0).hide();
}else if(this.value==2){
jQuery('.yearly').val(0).hide();
jQuery('.half-yearly').val('').show();
jQuery('.quarterly').val(0).hide();
}else if(this.value==3){
jQuery('.yearly').val(0).hide();
jQuery('.half-yearly').val(0).hide();
jQuery('.quarterly').val('').show();
}
})
Check this Demo

enter text into select object

I want to enter the text selection for the following select field:
<select name="Payerid" id="Payerid" class="text" name="Payerid">
<option value="383">Aetna Healthcare</option>
...
Using VBA, I know I can use: (If you give me the syntax in another language, I'll convert)
IE.getElementById("Payerid").Value = "383"
but there about 100 options so I don't want to keep track of the values (which are meaningless to me) or changes the website developers make.
So is there a way to enter the text into the select field?
I tried:
IE.getElementById("Payerid").Text = "Aetna Healthcare"
but that didn't work.
Thanks

You mean you want to change the value? That's just $('select').val('value you want');, using Jquery.
If you're wanting to obtain the value based on what is in the text field, that is as below, derived in part from this post.
var pick = "hey";
var value_pick = $('option').filter(function () { return $(this).html() == pick; }).val();
console.log(value_pick);
$("select").val(value_pick);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select>
<option value="1" >hey</option>
<option value="1" >baha</option>
<option value="1" >yo</option>
</select>

How can I put selected value of jquery multiselect dropdown into a hidden element's id

How can I put selected value of jquery multiselect dropdown into a hidden element's id? I need that id be an array so I can get the selected values of the multiselect into that.
What I tried is:
$( "#Myselect" ).change(function(){
var str = "";
$( "select option:selected" ).each(function() {
str += $( this ).val() + " ";
});
document.getElementById("objecttype").value = str;
}).trigger( "change" );
<html:hidden styleId="objecttype" property="objecttype" name="Myobjecttype"/>
but objecttype is just an id and isn't an array!

I assume you want this hidden field to be posted somewhere and used later on (server-side or whatever). Take a look at this Fiddle: http://jsfiddle.net/hm71689h/ it is roughly what you wanted.
Take into account what Haxxxton just said: you're joining the values using a delimiter (in this example a comma by default). You need to split that value into a new array later on.
Also, in your code-sample, you're referring to the hidden field using: document.getElementById("objecttype")
But you did not use an identifier, you used a name. Although you might think it should be the same, an ID is not the same as the name of an element.

I think you need smth like this:
HTML:
<select name="choice" multiple id="mySelect">
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<input type="hidden" name="myObjecttype" />
JS:
$('#mySelect').change(function(){
//brand new array each time
var foo = [];
//fills the array
foo = $("option:selected", this).map(function(){ return $(this).val() }).get();
//fills input with vals, as strings of course
$("input[name='myObjecttype']").val(foo);
//logs an array, if needed
console.log($("input[name='myObjecttype']").val().split(','));
});
Don't forget hidden input can't store array-/object- data, only strings. But you can easily make array.
See working jsfiddle: http://jsfiddle.net/sfvx5Loj/1/

Set option of the Select box according to JSON result

I actually have some questions but I will start with the main one. I want to set the value of Select box on the basis of JSON.
Here's the HTML in question,
<label class="lbl">Office: </label>
<select tab-index="6" class="required" name="office" class="off">
<option value="">---------</option>
<option value="U">London</option>
<option selected="selected" value="R">Delhi</option>
<option value="W">Lisbon</option>
</select>
JSON sends it like this, I can't show the full JSON since it's too big, but I will show a part, Location: "U".
Here's the JS part:
if (data.Office === "R") {
$('select option[value="Delhi"]').prop('selected', true);
}
if (data.Office === "U") {
console.log('here');
$('.off option[value="London"]').attr('selected', 'selected');
}
if (data.Office === "W") {
$('select option[value="Lisbon"]').prop('selected', true);
}
But it's not working? Can any one point out why?
Moreover, I have a list of managers say and I am also getting that in JSON. So I am doing this,
for (var i = 0; i < data.Managers.length; i++) {
find_input = $('input[name="project_manager[]"').length;
if (find_input != data.Managers.length) {
$('<input type="text" name="project_manager[]" class="" value="" />').appendTo('#managers');
}
console.log(data.Managers[i].Manager);
$('input[name="project_manager[]"').each(function() {
$(this).val(data.Managers[i].Manager);
});
}
No of textboxes depend on the number of managers, but it only sets the value of last item from the array of managers in text boxes that are appended. Why?
Moreover I am not able to set value of textarea in Firefox like this:
$('textarea#some_id').val(data.Description);
It works in Chrome though.

First you need to add the character "<" in the beginning of the 3rd option of the select box:
<option selected="selected" value="R">Delhi</option>
Now, in the JS code, your problem is that you're using the wrong value. Instead of:
$('select option[value="Lisbon"]').prop('selected', true);
You must use:
$('select option[value="W"]').prop('selected', true);
I hope it help.

I think your selectors should be of the form:
$('select option[value="R"]').prop('selected', true);
Note the value is the same as the value in the HTML, not the displayed string (i.e. 'R' instead of 'Delhi').
Also, you should be using prop() consistently for selected flag, as described here by John Resig.