Related
I have an array of state which is controlled through a dropdown.
This is state held like:
const [finalselected, setfinalSelected] = useState([]);
When a submit button is clicked, I would like to confirm that an element does not already exist in the array, for example an individual cannot input "experience": "A similar role" 10 times into the array.
My current function does not stop additional elements coming if it is a duplicate:
const onSubmitFinalSelection = (val) => {
if (!finalselected.includes(selectedExperience)) {
//if finalselected does NOT include the element, then add in a new element
// setfinalSelected((prev) => [...prev, selectedExperience, inputfield]);
setfinalSelected((prevFinalSelection) => [
...prevFinalSelection,
{
//this is the dropdown
experience: selectedExperience,
//this is an input
inputfield,
},
]);
}
console.log(finalselected)
};
How would you re-write this?
Something like this? I don't think the includes function works with the selectedExperience as single parameter since the array contains objects.
const onSubmitFinalSelection = (val) => {
// If found, return
if (finalselected.some(x => x.experience === selectedExperience))
return;
setfinalSelected([...finalSelected, {
//this is the dropdown
experience: selectedExperience,
//this is an input
inputfield,
}])
console.log(finalsSlected)
};
Alerting if the element is already inside my array if not doing normal push.
let selectedValues = document.querySelector(".selectedValues");
let array = [];
function myFunction(option) {
option = option.value;
if (array.includes(option)) {
alert(option + " "+ "is already selected")
} else {
array.push(option);
}
selectedValues.textContent = array;
}
<textarea class="selectedValues" type="text"></textarea>
<select onchange="myFunction(this)" id="cars">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
How can I get all the options of a select through jQuery by passing on its ID?
I am only looking to get their values, not the text.
Use:
$("#id option").each(function()
{
// Add $(this).val() to your list
});
.each() | jQuery API Documentation
Without jQuery
I do know that the HTMLSelectElement element contains an options property, which is a HTMLOptionsCollection.
const myOpts = document.getElementById('yourselect').options;
console.log(myOpts[0].value) //=> Value of the first option
A 12 year old answer. Let's modernize it a bit (using .querySelectorAll, spreading the resulting HTMLOptionsCollection to Array and map the values).
// helper to retrieve an array of elements using a css selector
const nodes = selector => [...document.querySelectorAll(selector)];
const results = {
pojs: nodes(`#demo option`).map(o => o.value),
jq: $(`#demo option`).toArray().map( o => o.value ),
}
console.log( `pojs: [${results.pojs.slice(0, 5)}]` );
console.log( `jq: [${results.jq.slice(0, 5)}]` );
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="demo">
<option value="Belgium">Belgium</option>
<option value="Botswana">Botswana</option>
<option value="Burkina Faso">Burkina Faso</option>
<option value="Burundi">Burundi</option>
<option value="China">China</option>
<option value="France">France</option>
<option value="Germany">Germany</option>
<option value="India">India</option>
<option value="Japan">Japan</option>
<option value="Malaysia">Malaysia</option>
<option value="Mali">Mali</option>
<option value="Namibia">Namibia</option>
<option value="Netherlands">Netherlands</option>
<option value="North Korea">North Korea</option>
<option value="South Korea">South Korea</option>
<option value="Spain">Spain</option>
<option value="Sweden">Sweden</option>
<option value="Uzbekistan">Uzbekistan</option>
<option value="Zimbabwe">Zimbabwe</option>
</select>
$.map is probably the most efficient way to do this.
var options = $('#selectBox option');
var values = $.map(options ,function(option) {
return option.value;
});
You can add change options to $('#selectBox option:selected') if you only want the ones that are selected.
The first line selects all of the checkboxes and puts their jQuery element into a variable. We then use the .map function of jQuery to apply a function to each of the elements of that variable; all we are doing is returning the value of each element as that is all we care about. Because we are returning them inside of the map function it actually builds an array of the values just as requested.
Some answers uses each, but map is a better alternative here IMHO:
$("select#example option").map(function() {return $(this).val();}).get();
There are (at least) two map functions in jQuery. Thomas Petersen's answer uses "Utilities/jQuery.map"; this answer uses "Traversing/map" (and therefore a little cleaner code).
It depends on what you are going to do with the values. If you, let's say, want to return the values from a function, map is probably the better alternative. But if you are going to use the values directly you probably want each.
$('select#id').find('option').each(function() {
alert($(this).val());
});
This will put the option values of #myselectbox into a nice clean array for you:
// First, get the elements into a list
var options = $('#myselectbox option');
// Next, translate that into an array of just the values
var values = $.map(options, e => $(e).val())
$("#id option").each(function()
{
$(this).prop('selected', true);
});
Although, the CORRECT way is to set the DOM property of the element, like so:
$("#id option").each(function(){
$(this).attr('selected', true);
});
You can take all your "selected values" by the name of the checkboxes and present them in a sting separated by ",".
A nice way to do this is to use jQuery's $.map():
var selected_val = $.map($("input[name='d_name']:checked"), function(a)
{
return a.value;
}).join(',');
alert(selected_val);
Working example
The most efficient way to do this is to use $.map()
Example:
var values = $.map($('#selectBox option'), function(ele) {
return ele.value;
});
You can use following code for that:
var assignedRoleId = new Array();
$('#RolesListAssigned option').each(function(){
assignedRoleId.push(this.value);
});
For multiselect option:
$('#test').val() returns list of selected values.
$('#test option').length returns total number of options (both selected and not selected)
Another way would be to use toArray() in order to use fat arrow function with map e.g:
const options = $('#myselect option').toArray().map(it => $(it).val())
Here is a simple example in jquery to get all the values, texts, or value of the selected item, or text of the selected item
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).val());
})
printOptionValues = () => {
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).val());
})
}
printOptionTexts = () => {
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).text());
})
}
printSelectedItemText = () => {
console.log($('#nCS1 option:selected').text());
}
printSelectedItemValue = () => {
console.log($('#nCS1 option:selected').val());
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select size="1" id="nCS1" name="nCS1" class="form-control" >
<option value="22">Australia</option>
<option value="23">Brunei</option>
<option value="33">Cambodia</option>
<option value="32">Canada</option>
<option value="27">Dubai</option>
<option value="28">Indonesia</option>
<option value="25">Malaysia</option>
</select>
<br/>
<input type='button' onclick='printOptionValues()' value='print option values' />
<br/>
<input type='button' onclick='printOptionTexts()' value='print option texts' />
<br/>
<input type='button' onclick='printSelectedItemText()' value='print selected option text'/>
<br/>
<input type='button' onclick='printSelectedItemValue()' value='print selected option value' />
var arr = [], option='';
$('select#idunit').find('option').each(function(index) {
arr.push ([$(this).val(),$(this).text()]);
//option = '<option '+ ((result[0].idunit==arr[index][0])?'selected':'') +' value="'+arr[index][0]+'">'+arr[index][1]+'</option>';
});
console.log(arr);
//$('select#idunit').empty();
//$('select#idunit').html(option);
This is a simple Script with jQuery:
var items = $("#IDSELECT > option").map(function() {
var opt = {};
opt[$(this).val()] = $(this).text();
return opt;
}).get();
var selectvalues = [];
for(var i = 0; i < items.length; i++) {
for(key in items[i]) {
var id = key;
var text = items[i][key];
item = {}
item ["id"] = id;
item ["text"] = text;
selectvalues.push(item);
}
}
console.log(selectvalues);
copy(selectvalues);
<select>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
This is a very simple way to generate a list of comma separated values.
var values = "";
$('#sel-box option').each(function () {
values = values + $(this).val() + ";";
});
$("input[type=checkbox][checked]").serializeArray();
Or:
$(".some_class[type=checkbox][checked]").serializeArray();
To see the results:
alert($("input[type=checkbox][checked]").serializeArray().toSource());
If you're looking for all options with some selected text then the below code will work.
$('#test').find("select option:contains('B')").filter(":selected");
The short way
$(() => {
$('#myselect option').each((index, data) => {
console.log(data.attributes.value.value)
})})
or
export function GetSelectValues(id) {
const mData = document.getElementById(id);
let arry = [];
for (let index = 0; index < mData.children.length; index++) {
arry.push(mData.children[index].value);
}
return arry;}
I found it short and simple, and can be tested in Dev Tool console itself.
$('#id option').each( (index,element)=>console.log( index : ${index}, value : ${element.value}, text : ${element.text}) )
$("select#MY_SELECT_ID").find('option').each(function() {
console.log($(this).val());
console.log($(this).text());
});
I wrote the following function that turns a div/Form into serialized object. I use this returned to pass into my database javascript calling methods.
Tater.prototype._formToObject = function(formData) {
var p = {};
jQuery.each(jQuery(formData).serializeArray(),function(i, e){
p[e.name] = e.value;
});
return p;
};
The only issue is if I change my form to have a multiple select option, it only grabs the first value of the multiple selected. How would I extend this to allow for such behavior?
Try something along these lines to get the array of values.
If you give us a working snippet of what you are doing it will be easier to adapt to what you want.
Most likely you need to add a check for the multiple attribute on e (see comments below)
else do the current logic that seems to be working
in the below logic replace this with e for your scenario
`
Tater.prototype._formToObject = function(formData) {
const p = {};
jQuery.each(jQuery(formData).serializeArray(),function(i, e){
//check for multiple attr
e.getAttribute('multiple') == null ?
(p[e.name] = e.value) :
(p[e.name] = $(e).val());
});
return p;
};
`
document.getElementById('multi').addEventListener('change', function () {
//jquery
this.getAttribute('multiple') != null && console.log($(this).val());
//vanilla
if(this.getAttribute('multiple') != null) {
const arr = [], nodes = this.querySelectorAll(':checked');
for(let i = 0; i < nodes.length; i++) {
arr.push(nodes[i].value);
}
console.log(arr);
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select multiple id="multi">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
<!-- from https://www.w3schools.com/tags/att_select_multiple.asp -->
I have a slight issue. I have options with a “value” and a “data-name”.
<option value=”A” data-name1=”X”>
<option value=”B” data-name1=”Y”>
I want the computer return a specific value if the selected option is a certain “data-name”
Say there are 2 “data-names”, X and Y.
How can I compare the data-name of the selected option to the 2 data-names, X and Y, to find out which one it is?
I’m thinking something along the lines of this:
var data_name1 = e.options[e.selectedIndex].dataset.name1;
if (data_name1 == “X”) {
…
}
else if (data_name == “Y”) {
…
}
else {
…
}
Is this possible?
Thanks!
Full code---
<script>
document.getElementById("selectElement").selectedIndex = -1; // so that no option //is selected when the page is loaded
function getData(){
var e = document.getElementById("qwert"); // get the <select> element
var data_name1 = e.options[e.selectedIndex].dataset.name1; // get the selected //<option> and its name1 data attribute
// var data_name2 = e.options[e.selectedIndex].dataset.name2; get the selected //<option> and its name2 data attribute
var value = e.options[e.selectedIndex].value; // get the value of the selected <option>
//Result
document.getElementById("data1").innerHTML = data_name1;
document.getElementById("value").innerHTML = value;
}
</script>
<select id="qwert" onclick="getData ()">
<option value="135" data-name1="M">A</option>
<option value="150" data-name1="R">B</option>
<option value="51" data-name1="R">C</option>
<option value="27" data-name1="M">D</option>
</select>
<p>
<label>data-name1 = </label>
<span>"</span><span id="data1"></span><span>"</span>
</p>
<p>
<label>value = </label>
<span>"</span><span id="value"></span><span>"</span>
</p>
You need to use the == operator to compare objects.
= is an assignment expression.
if (data_name1 == “X”) {
// Operations if data_name is equal to X
}
else if (data_name == “Y”) {
// Operations is data_name is equal to Y
}
else {
}
How can I get all the options of a select through jQuery by passing on its ID?
I am only looking to get their values, not the text.
Use:
$("#id option").each(function()
{
// Add $(this).val() to your list
});
.each() | jQuery API Documentation
Without jQuery
I do know that the HTMLSelectElement element contains an options property, which is a HTMLOptionsCollection.
const myOpts = document.getElementById('yourselect').options;
console.log(myOpts[0].value) //=> Value of the first option
A 12 year old answer. Let's modernize it a bit (using .querySelectorAll, spreading the resulting HTMLOptionsCollection to Array and map the values).
// helper to retrieve an array of elements using a css selector
const nodes = selector => [...document.querySelectorAll(selector)];
const results = {
pojs: nodes(`#demo option`).map(o => o.value),
jq: $(`#demo option`).toArray().map( o => o.value ),
}
console.log( `pojs: [${results.pojs.slice(0, 5)}]` );
console.log( `jq: [${results.jq.slice(0, 5)}]` );
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="demo">
<option value="Belgium">Belgium</option>
<option value="Botswana">Botswana</option>
<option value="Burkina Faso">Burkina Faso</option>
<option value="Burundi">Burundi</option>
<option value="China">China</option>
<option value="France">France</option>
<option value="Germany">Germany</option>
<option value="India">India</option>
<option value="Japan">Japan</option>
<option value="Malaysia">Malaysia</option>
<option value="Mali">Mali</option>
<option value="Namibia">Namibia</option>
<option value="Netherlands">Netherlands</option>
<option value="North Korea">North Korea</option>
<option value="South Korea">South Korea</option>
<option value="Spain">Spain</option>
<option value="Sweden">Sweden</option>
<option value="Uzbekistan">Uzbekistan</option>
<option value="Zimbabwe">Zimbabwe</option>
</select>
$.map is probably the most efficient way to do this.
var options = $('#selectBox option');
var values = $.map(options ,function(option) {
return option.value;
});
You can add change options to $('#selectBox option:selected') if you only want the ones that are selected.
The first line selects all of the checkboxes and puts their jQuery element into a variable. We then use the .map function of jQuery to apply a function to each of the elements of that variable; all we are doing is returning the value of each element as that is all we care about. Because we are returning them inside of the map function it actually builds an array of the values just as requested.
Some answers uses each, but map is a better alternative here IMHO:
$("select#example option").map(function() {return $(this).val();}).get();
There are (at least) two map functions in jQuery. Thomas Petersen's answer uses "Utilities/jQuery.map"; this answer uses "Traversing/map" (and therefore a little cleaner code).
It depends on what you are going to do with the values. If you, let's say, want to return the values from a function, map is probably the better alternative. But if you are going to use the values directly you probably want each.
$('select#id').find('option').each(function() {
alert($(this).val());
});
This will put the option values of #myselectbox into a nice clean array for you:
// First, get the elements into a list
var options = $('#myselectbox option');
// Next, translate that into an array of just the values
var values = $.map(options, e => $(e).val())
$("#id option").each(function()
{
$(this).prop('selected', true);
});
Although, the CORRECT way is to set the DOM property of the element, like so:
$("#id option").each(function(){
$(this).attr('selected', true);
});
You can take all your "selected values" by the name of the checkboxes and present them in a sting separated by ",".
A nice way to do this is to use jQuery's $.map():
var selected_val = $.map($("input[name='d_name']:checked"), function(a)
{
return a.value;
}).join(',');
alert(selected_val);
Working example
The most efficient way to do this is to use $.map()
Example:
var values = $.map($('#selectBox option'), function(ele) {
return ele.value;
});
You can use following code for that:
var assignedRoleId = new Array();
$('#RolesListAssigned option').each(function(){
assignedRoleId.push(this.value);
});
For multiselect option:
$('#test').val() returns list of selected values.
$('#test option').length returns total number of options (both selected and not selected)
Another way would be to use toArray() in order to use fat arrow function with map e.g:
const options = $('#myselect option').toArray().map(it => $(it).val())
Here is a simple example in jquery to get all the values, texts, or value of the selected item, or text of the selected item
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).val());
})
printOptionValues = () => {
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).val());
})
}
printOptionTexts = () => {
$('#nCS1 > option').each((index, obj) => {
console.log($(obj).text());
})
}
printSelectedItemText = () => {
console.log($('#nCS1 option:selected').text());
}
printSelectedItemValue = () => {
console.log($('#nCS1 option:selected').val());
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select size="1" id="nCS1" name="nCS1" class="form-control" >
<option value="22">Australia</option>
<option value="23">Brunei</option>
<option value="33">Cambodia</option>
<option value="32">Canada</option>
<option value="27">Dubai</option>
<option value="28">Indonesia</option>
<option value="25">Malaysia</option>
</select>
<br/>
<input type='button' onclick='printOptionValues()' value='print option values' />
<br/>
<input type='button' onclick='printOptionTexts()' value='print option texts' />
<br/>
<input type='button' onclick='printSelectedItemText()' value='print selected option text'/>
<br/>
<input type='button' onclick='printSelectedItemValue()' value='print selected option value' />
var arr = [], option='';
$('select#idunit').find('option').each(function(index) {
arr.push ([$(this).val(),$(this).text()]);
//option = '<option '+ ((result[0].idunit==arr[index][0])?'selected':'') +' value="'+arr[index][0]+'">'+arr[index][1]+'</option>';
});
console.log(arr);
//$('select#idunit').empty();
//$('select#idunit').html(option);
This is a simple Script with jQuery:
var items = $("#IDSELECT > option").map(function() {
var opt = {};
opt[$(this).val()] = $(this).text();
return opt;
}).get();
var selectvalues = [];
for(var i = 0; i < items.length; i++) {
for(key in items[i]) {
var id = key;
var text = items[i][key];
item = {}
item ["id"] = id;
item ["text"] = text;
selectvalues.push(item);
}
}
console.log(selectvalues);
copy(selectvalues);
<select>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
This is a very simple way to generate a list of comma separated values.
var values = "";
$('#sel-box option').each(function () {
values = values + $(this).val() + ";";
});
$("input[type=checkbox][checked]").serializeArray();
Or:
$(".some_class[type=checkbox][checked]").serializeArray();
To see the results:
alert($("input[type=checkbox][checked]").serializeArray().toSource());
If you're looking for all options with some selected text then the below code will work.
$('#test').find("select option:contains('B')").filter(":selected");
The short way
$(() => {
$('#myselect option').each((index, data) => {
console.log(data.attributes.value.value)
})})
or
export function GetSelectValues(id) {
const mData = document.getElementById(id);
let arry = [];
for (let index = 0; index < mData.children.length; index++) {
arry.push(mData.children[index].value);
}
return arry;}
I found it short and simple, and can be tested in Dev Tool console itself.
$('#id option').each( (index,element)=>console.log( index : ${index}, value : ${element.value}, text : ${element.text}) )
$("select#MY_SELECT_ID").find('option').each(function() {
console.log($(this).val());
console.log($(this).text());
});