What I'm trying is something pretty basic, but I can't do it because the examples I see aren't anything similar to what I'm looking for.
There are 2 select, one of them you choose manually and the other dynamically changes depending on the value of the first one.
If the value of the first select is 1, that in the second one they only appear whose value is 1 as well.
I want to make it 100% JavaScript, I don't want any JQuery.
HTML.php
<select onchange="catch_value_types()" name="types" id="types">
<option value="1">Meat</option>
<option value="2">Fish</option>
<option value="3">Vegetables</option>
</select>
<select name="food" id="food">
<option value="1">Pork</option>
<option value="1">Cow</option>
<option value="1">Chicken</option>
<option value="2">Sardine</option>
<option value="2">Salmon</option>
<option value="2">Mackerel</option>
<option value="3">Spinach</option>
<option value="3">Kale</option>
<option value="3">Green peas</option>
</select>
JavaScript.js
function catch_value_types() {
var types_value_option = document.getElementById("types").value;
// What should I put here?
}
Loop through the options and hide if value doesnot match
function catch_value_types() {
const selectedValue = document.getElementById("types").value;
const select2 = document.getElementById("food");
Array.from(select2.options).forEach((node) => node.style.display = node.value === selectedValue ? "block": "none");
}
<select onchange="catch_value_types()" name="types" id="types">
<option value="1">Meat</option>
<option value="2">Fish</option>
<option value="3">Vegetables</option>
</select>
<select name="food" id="food">
<option>Please Select</option>
<option value="1">Pork</option>
<option value="1">Cow</option>
<option value="1">Chicken</option>
<option value="2">Sardine</option>
<option value="2">Salmon</option>
<option value="2">Mackerel</option>
<option value="3">Spinach</option>
<option value="3">Kale</option>
<option value="3">Green peas</option>
</select>
I have a select element like this:
<select name="select">
<option value="opt1">Select One Value Only</option>
<option value="opt2">Type 2</option>
<option value="opt3">Type 3</option>
</select>
and I want user to select a option e.g. opt2, opt3... but opt1,
how to to use html 5 validation to valid the select?
I think the only way to add the validation here is to set the default option value to an empty string and add required attribute to select element. Now you can click on submit button to see the validation:
<form>
<label >Choose an option:</label>
<select name="select" required>
<option value="" disabled selected>Select One Value Only</option>
<option value="opt2">Type 2</option>
<option value="opt3">Type 3</option>
</select>
<input type="submit">
</form>
The issue here is that when you set a value to the default option to something other than empty string the validation infers it as a valid value has been already selected, thus the validation is not triggered at that point.
You can do something like the following:
<select name="select">
<option value="opt1" selected disabled>Select One Value Only</option>
<option value="opt2">Type 2</option>
<option value="opt3">Type 3</option>
</select>
In the snippet above, the opt1 is selected by default. The user can only select opt2 or opt3, but once they do that then they cannot selecte opt1, hope this is the behaviour you're looking for.
Try Using:
<select name="select" required>
<option value="opt1" selected="selected" disabled>Select One Value Only</option>
<option value="opt2">Type 2</option>
<option value="opt3">Type 3</option>
</select>
I have the following select drop down box:
<select name="selectcourier" required>
<option value="">Please Select</option>
<option value="collection">Collection</option>
<option value="Interlink">Interlink</option>
<option value="DespatchBay">Despatch Bay</option>
<option value="International">International</option>
</select>
What I want to do is if Interlink is selected a secondary select box appears below it and disappears if it unselected and another option is chosen instead. This is the second select drop down box.
<label>Select Shipping Courier:</label>
<select name="selectcourier" required>
<option value="1">Please Select</option>
<option value="2">Next Day</option>
<option value="3">2-3 Day</option>
<option value="3">Pre 12</option>
</select>
How can I go about getting this working?
bind an event with javascript on change and insert a new element in the DOM (the second select statement) like:
(provided you have jquery)
var secondSelect="your_html_here";
$("name='selectcourier'").change(function() {
if (this.val()=='Interlink') {
$('body').append(secondSelect); }
else {
$('#secondselectid').remove();
});
customise the html and where you want to append the second select
<script>
$(function(){
$('#s1').hide();
});
function call()
{
var check=$('#s2').val();
if(check=="Interlink")
{
$('#s1').show();
}
else
{
$('#s1').hide();
}
}
</script>
<select name="selectcourier" required onchange="call();" id="s2" >
<option value="">Please Select</option>
<option value="collection">Collection</option>
<option value="Interlink">Interlink</option>
<option value="DespatchBay">Despatch Bay</option>
<option value="International">International</option>
</select>
<label>Select Shipping Courier:</label>
<select name="selectcourier" required id="s1">
<option value="1">Please Select</option>
<option value="2">Next Day</option>
<option value="3">2-3 Day</option>
<option value="3">Pre 12</option>
</select>
You can use the above code to achieve your task
Just react on the event of changing the value of the first select.
If the value equals 'Interlink' display the second select - if the value is something else hide the second select.
<select name="selectcourier" required onchange="document.getElementById('interlink_addition').style.display = (this.value=='Interlink' ? 'block' : 'none')">
<option value="">Please Select</option>
<option value="collection">Collection</option>
<option value="Interlink">Interlink</option>
<option value="DespatchBay">Despatch Bay</option>
<option value="International">International</option>
</select>
<div id="interlink_addition" style="display:none">
<label>Select Shipping Courier:</label>
<select name="selectcourier" required>
<option value="1">Please Select</option>
<option value="2">Next Day</option>
<option value="3">2-3 Day</option>
<option value="3">Pre 12</option>
</select>
</div>
you can use ajax for this. write a ajax function to show second select box and call it on onChange event of the first select Box
I have a form with 2 radio buttons and when either button is toggled it shows or hides a certain fieldset. The issue I have is because the fieldset is just hidden so when the form is submitted it still takes the first fieldsets values.
I have setup a fiddle to show how the form changes the fieldsets http://jsfiddle.net/hhdMq/1/
So when I select "Scale B" although you can change the correct values, when the form is submitted it takes the default values of Scale A.
<center>
<input type="radio" name="sellorlet" value="Yes" id="rdYes" checked="yes" />
<label for="rdYes">Scale A</label>
<input type="radio" name="sellorlet" value="No" id="rdNo" />
<label for="rdNo">Scale B</label>
</center>
<fieldset id="sell">
<center>
<select id="pricemin" name="min">
<option value="50000">Min Price</option>
<option value="50000">£50,000</option>
<option value="100000">£100,000</option>
<option value="200000">£200,000</option>
<option value="300000">£300,000</option>
<option value="400000">£400,000</option>
<option value="500000">£500,000</option>
<option value="600000">£600,000</option>
<option value="700000">£700,000</option>
<option value="800000">£800,000</option>
<option value="900000">£900,000</option>
<option value="1000000">£1,000,000</option>
<option value="1250000">£1,250,000</option>
<option value="1500000">£1,500,000</option>
<option value="1750000">£1,750,000</option>
<option value="2000000">£2,000,000</option>
<option value="3000000">£3,000,000</option>
</select>
<select id="pricemax" name="max">
<option value="5000000">Max Price</option>
<option value="100000">£100,000</option>
<option value="200000">£200,000</option>
<option value="300000">£300,000</option>
<option value="400000">£400,000</option>
<option value="500000">£500,000</option>
<option value="600000">£600,000</option>
<option value="700000">£700,000</option>
<option value="800000">£800,000</option>
<option value="900000">£900,000</option>
<option value="1000000">£1,000,000</option>
<option value="1250000">£1,250,000</option>
<option value="1500000">£1,500,000</option>
<option value="1750000">£1,750,000</option>
<option value="2000000">£2,000,000</option>
<option value="3000000">£3,000,000</option>
<option value="4000000">£4,000,000</option>
<option value="5000000">£5,000,000</option>
</select>
</center>
</fieldset>
<fieldset id="buy" style="display:none;">
<center>
<select id="lpricemin" name="min">
<option value="500">Min Price</option>
<option value="500">£500</option>
<option value="600">£600</option>
<option value="700">£700</option>
<option value="800">£800</option>
<option value="900">£900</option>
<option value="1000">£1000</option>
<option value="1150">£1150</option>
<option value="1250">£1250</option>
<option value="1500">£1500</option>
<option value="2000">£2000</option>
<option value="2500">£2500</option>
<option value="3000">£3000</option>
<option value="4000">£4000</option>
<option value="5000">£5000</option>
</select>
<select id="lpricemax" name="max">
<option value="5000">Max Price</option>
<option value="600">£600</option>
<option value="700">£700</option>
<option value="800">£800</option>
<option value="900">£900</option>
<option value="1000">£1000</option>
<option value="1150">£1150</option>
<option value="1250">£1250</option>
<option value="1500">£1500</option>
<option value="2000">£2000</option>
<option value="2500">£2500</option>
<option value="3000">£3000</option>
<option value="4000">£4000</option>
<option value="5000">£5000</option>
</select>
</center>
</fieldset>
and the jquery used:
$("input[name='sellorlet']").change(function () {
$("#sell").toggle(this.value == "Yes");
$("#let").toggle(this.value == "No");
});
My question is, how can I completely disable the first fieldset if Scale B is selected and likewise when Scale A is selected it will disable the second fieldset?
Many thanks
When submitting a form, you cannot have two inputs, selects, or textareas with the same name in the same form. Doing so will cause confusion and probably end up the wrong info being submitted. There are two ways you can fix this.
Method 1:
Change the
<select id="lpricemin" name="min">
<select id="lpricemin" name="lmin">
to
<select id="lpricemax" name="max">
<select id="lpricemax" name="lmax"> respectively.
This will allow you to handle the data from lmin and lmax and ensure you get the info from the second fieldset.
Method 2:
Put the second fieldset in a different form. Then just change the jQuery to show the forms instead of the fieldsets.
Changed the radio buttons now to a tabbed design so the form can be separated correctly. If anyone would like to know how the tabs are done they are here http://cssdeck.com/labs/fancy-tabbed-navigation-with-css3-and-jquery
Method 3 would be to change the switch the content of your select through Javascript rather than toggling through visibility. You can do that through:
function setMaxScale()
{
document.getElementById().innerHTML = "<option value="50000">Min Price</option>\
<option value="50000">£50,000</option>\
<option value="100000">£100,000</option>\
<option value="200000">£200,000</option>\
<option value="300000">£300,000</option>...";
}
An other clean solution would be to create your scales dynamically with a loop.
Here is what I've started to do: http://jsfiddle.net/nd9ny/
For now it doesn't work as I want it to.
I want to update options each time when a new select input is added or an input is removed.
For example, we have our first select input with these options:
<select>
<option value="1"></option>
<option value="2"></option>
<option value="3"></option>
<option value="4"></option>
</select>
When I add new input to my page, I want my function to update all the inputs and to remove the newly selected option from them.
<select>
<option value="1" selected></option>
<option value="3"></option> // The second one is removed
<option value="4"></option>
</select>
<select>
<option value="2" selected></option> // The first one is removed
<option value="3"></option>
<option value="4"></option>
</select>
And then, If I remove the first input, the second one becomes:
<select>
<option value="1"></option>
<option value="2" selected></option>
<option value="3"></option>
<option value="4"></option>
</select>
Pure Javascript code needed.
You may try the following solution:
- CSS:
.hidden {
display: none;
}
- JS function:
function hide_selected(el) {
var index = el.selectedIndex;
// Show every options
for(var i=0; i<el.length; i++)
el[i].className="";
// Hide the selected one
el[index].className="hidden";
}
- HTML example:
<body>
<select onchange="javascript:hide_selected(this);">
<option value="1" class="hidden" selected="selected">1</option>
<option value="2" class="">2</option>
<option value="3" class="">3</option>
<option value="4" class="">4</option>
</select>
</body>
Note: This function was tested with Firefox, you may have to check if this works with other browsers.
Hope this helps