I have a select box as follows
<select>
<option value="yes">Yes</option>
<option value="No" selected="selected">No</option>
<option value="Maybe">Maybe</option>
<option value="So">So</option>
</select>
I would like
<select>
<option value="yes">Yes</option>
<option value="No">No</option>
<option value="Maybe" selected="selected">Maybe</option>
<option value="So">So</option>
</select>
*note default selection is now "Maybe" instead of "No"
I learned jquery before really getting comfortable with pure JavaScript. So im trying to learn it.
I would assign an id to the select element:
<select id="choices">
<option value="yes">Yes</option>
<option value="No" selected="selected">No</option>
<option value="Maybe">Maybe</option>
<option value="So">So</option>
</select>
Then, access the options via the standard options array on <select> elements:
var choices = document.getElementById('choices');
choices.options[2].selected = true;
You should assign an id to the select element then do this:
var s = document.getElementById( 'select_box' );
s.options[ 2 ].selected = true;
Related
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 two selection boxes, the default value is - and i want to pick something else for both, my first problem is both fields have dynamic id like prod-685209-Size so i'm having trouble accessing with id.
I have the following HTML:
<select class="sku-attr" name="Size">
<option value="_def">-</option>
<option value="S">S</option>
<option value="M">M</option>
<option value="L">L</option>
<option value="XL">XL</option>
</select>
<select class="sku-attr" name="Color">
<option value="_def">-</option>
<option value="Black">Black</option>
<option value="Blue">Blue</option>
</select>
So i executed the following:
document.getElementsByTagName('select')[0].selectedIndex = 2
document.getElementsByTagName('select')[1].selectedIndex = 2
It worked on the front side, showing my new options but it didn't prompt the backend as it is not actually selecting the options. Backend works fine when i click to these options by hand, basically i need another solution to choose these options.
If I don't misunderstood your requirement then you need something like this. Just add two different ids to your select element and attach a change event listener. For example size and color
var s = document.getElementById("size");
var c = document.getElementById("color");
function getSize() {
sizeSelected = s.value;
console.log('size=' + sizeSelected);
}
function getColor() {
colorSelected = c.value;
console.log('color=' + colorSelected);
}
s.addEventListener('change', getSize);
c.addEventListener('change', getColor);
<select id="size" class="sku-attr" name="Size">
<option value="_def">-</option>
<option value="S">S</option>
<option value="M">M</option>
<option value="L">L</option>
<option value="XL">XL</option>
</select>
<select id="color" class="sku-attr" name="Color">
<option value="_def">-</option>
<option value="Black">Black</option>
<option value="Blue">Blue</option>
</select>
You need to add .validate() after your dom commands to actually prompt the page.
I have done some searching but I am very new to JavaScript and jQuery and can't seem to figure out how to go about this (or if it is even possible). Basically, I have two select menus and an associated value with each choice that is NOT the same as the text but the same between selects:
<select id="day1Breakfast">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
<select id="day2Breakfast">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
What I need to do is populate another div with the text of the choice based on the SELECT ID and OPTION VALUE. For instance, if someone selected "Muffin" from the day2Breakfast SELECT, I would want to alert("You chose Muffin for Day 2"). I understand that I can use this to find the text from a div with some ID:
document.getElementById("day1Breakfast").text()
But that will return "Bacon Egg and CheeseMuffinBagel". I need only retrieve the text associated with the specific SELECT ID and OPTION VALUE.
Thank you very much!
You're looking for the elements .value (in vanilla JavaScript), and is .val() in jQuery. Further, to get the text of the selected value, simply request all option:selected within the element:
// Event delegation on all select elements
$("select").on("change", function (e) {
// When a select changes, find the selection option
// Also, get the ID of the select element that changed
var selected = $(this).find("option:selected"),
fromElem = $(this).prop("id");
// Output the new selected text, value, and ID of affected select
console.log( selected.text(), selected.val(), fromElem );
});
U want something like this,
$("#day1Breakfast option[value='bec']").text();
<script type="text/javascript">
function fnc(myid,myvalue)
{
alert("you've chosen "+myvalue+" from "+myid);
}
</script>
<select id="day1Breakfast" onChange="fnc(this.id,this.value)">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
<select id="day2Breakfast" onChange="fnc(this.id,this.value)">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
I modified your html a little. See demo http://jsfiddle.net/j6HU6/8/
HTML:
<select class="menu" name="day 1">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
<select class="menu" name="day 2">
<option value="">Select One</option>
<option value="bec">Bacon Egg and Cheese</option>
<option value="muf">Muffin</option>
<option value="bag">Bagel</option>
</select>
JS:
$('.menu').change(function(){
alert('You chose ' + $(this).children('option:selected').text() + ' for ' + $(this).attr('name'));
});
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