I have a dropdown list with several options and now I want to insert a new option to the top of the list. How do I do that?
function insertOptionAll (DOMtarget)
{
var option = document.createElement("option");
option.text = "Some option";
option.value = 0;
option.title = "Some option";
DOMtarget.add(option); //appends to the end
//DOMtarget.options[DOMtarget.options.length - 1].index = 0; --> doesnt work
}
Try ...
DOMtarget.insertBefore(option, DOMtarget.options[0]);
See: Add new <option> to all dropdown <select> tags using javascript
function insertOption(selectId) {
var selectList = document.getElementById(selectId);
var option = document.createElement("option");
option.text = "Some option";
option.value = 0;
option.title = "Some option";
selectList.insertBefore(option, selectList.options[0]);
}
Related
When loading an HTML table, there is this select input field, which should make available some options.
Right after the HTML table row is built, I'm calling a function, which should populate this input field, getting it by its class.
Here is the HTML piece and the function:
function loadTelaOptions(telaOptions) {
telaOptions = ["09-Black", "11-LT Jaspe"]; //Here for tests
document.querySelector('tableBodySelect').value = '';
let selectList = document.querySelector('tableBodySelect');
let options = selectList.getElementsByTagName('option');
for (let i = options.length; i--;) {
selectList.removeChild(options[i]);
}
let option = document.createElement("option");
option.value = "";
option.text = "";
selectList.appendChild(option);
telaOptions.forEach(function(item, index) {
let option = document.createElement("option");
option.value = item.toLowerCase();
option.text = item;
selectList.appendChild(option)
});
}
<td>
<select name='tableselect' required='required' class='tableBodySelect' value='Trying'>
</select>
</td>
Appreciate any help!
Your selectors for .querySelector('tableBodySelect') doesn't match your desired elements. You try to match the classes, therefore you need to prepend a . to your selector .querySelector('.tableBodySelect')
This does already resolve your issue.
function loadTelaOptions(telaOptions) {
telaOptions = ["09-Black", "11-LT Jaspe"]; //Here for tests
document.querySelector('.tableBodySelect').value = '';
let selectList = document.querySelector('.tableBodySelect');
let options = selectList.getElementsByTagName('option');
for (let i = options.length; i--;) {
selectList.removeChild(options[i]);
}
let option = document.createElement("option");
option.value = "";
option.text = "";
selectList.appendChild(option);
telaOptions.forEach(function(item, index) {
let option = document.createElement("option");
option.value = item.toLowerCase();
option.text = item;
selectList.appendChild(option)
});
}
loadTelaOptions();
<td>
<select name='tableselect' required='required' class='tableBodySelect' value='Trying'>
</select>
</td>
I have a button which allows an ingredient to be added to a database. When the button is clicked, the user can add the name, measurement and unit for the ingredient which is done using Javascript:
function addIngredient() {
var area = document.getElementById("addedIngredient");
var num = document.createElement("p");
numText = document.createTextNode(countIngredient + ". ");
num.appendChild(numText);
area.appendChild(num);
//Ingredient Name
var ingredientNameLabel = document.createElement("p");
ingredientNameLabelText = document.createTextNode("Name");
ingredientNameLabel.appendChild(ingredientNameLabelText);
area.appendChild(ingredientNameLabel);
countIngredient++;
var ingredientNameInput = document.createElement("INPUT");
ingredientNameInput.setAttribute("name", "ingredient_name[]");
ingredientNameInput.setAttribute("type", "text");
ingredientNameInput.setAttribute("class", "form-control");
ingredientNameInput.setAttribute("class", "ingName");
area.appendChild(ingredientNameInput);
//Ingredient Measure
var ingredientMeasureLabel = document.createElement("p");
ingredientMeasureLabelText = document.createTextNode("Measure");
ingredientMeasureLabel.appendChild(ingredientMeasureLabelText);
area.appendChild(ingredientMeasureLabel);
var ingredientMeasureInput = document.createElement("INPUT");
ingredientMeasureInput.setAttribute("name", "ingredient_measure[]");
ingredientMeasureInput.setAttribute("type", "text");
ingredientMeasureInput.setAttribute("class", "form-control");
ingredientMeasureInput.setAttribute("class", "ingMeasure");
area.appendChild(ingredientMeasureInput);
//Ingredient Unit
var ingredientUnitLabel = document.createElement("p");
ingredientUnitLabelText = document.createTextNode("Unit");
ingredientUnitLabel.appendChild(ingredientUnitLabelText);
area.appendChild(ingredientUnitLabel);
var select = document.createElement("SELECT");
select.setAttribute("name", "ingredient_unit[]");
area.appendChild(select);
var option = document.createElement("option");
option.setAttribute("value", "grams");
var value = document.createTextNode("g");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "milimeters");
var value = document.createTextNode("ml");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "kilograms");
var value = document.createTextNode("kg");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "litres");
var value = document.createTextNode("litre(s)");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "slice");
var value = document.createTextNode("slice");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "whole");
var value = document.createTextNode("whole");
option.appendChild(value);
select.appendChild(option);
var option = document.createElement("option");
option.setAttribute("value", "pinch");
var value = document.createTextNode("pinch");
option.appendChild(value);
select.appendChild(option);
}
I am looking to get the unit selected for every ingredient added.
Can anyone tell me how I could do this using PHP?
I am trying the following way:
$units = [];
foreach ($_POST["ingredient_unit[]"] as $key => $unit) {
array_push($units, $unit);
}
This does not work nor does it give an error.
Thanks.
Change the following code:
foreach ($_POST["ingredient_unit[]"] as $key => $unit) {
array_push($units, $unit);
}
And use this instead:
foreach ($_POST["ingredient_unit"] as $key => $unit) {
array_push($units, $unit);
}
And you should be getting a notice when you try to access $_POST["ingredient_unit[]"] since its not defined. If you are not seeing a notice, maybe the error_reporting level is too low. You could use something like the following to active all errors except the deprecated ones:
error_reporting(E_ALL &~ E_DEPRECATED);
I have a select field as follows:
<select id="field">
I add options based on values found in another div (OtherDiv) on my page like this:
window.onload = function onload()
{
var OtherDiv = document.getElementById('OtherDiv').innerHTML;
var result = OtherDiv.match(/SomeRegex/gi);
var select = document.getElementById("field");
for(var i = 0; i < result.length; i++)
{
var option = document.createElement("option");
option.value = i+1;
option.innerHTML = result[i];
select.add(option);
}
}
However, I would like to set up some alternative value for the field to show, if there are no matches to the regex. How would I best achieve that?
Use if condition
window.onload = function onload()
{
var OtherDiv = document.getElementById('OtherDiv').innerHTML;
var result = OtherDiv.match(/SomeRegex/gi);
var select = document.getElementById("field");
if(result.length){
for(var i = 0; i < result.length; i++)
{
var option = document.createElement("option");
option.value = i+1;
option.innerHTML = result[i];
select.add(option);
}
}else{
//add alternative options here
var option = document.createElement("option");
option.innerHTML = "No records found"; //whatever text you want to show
select.add(option);
}
}
Here's a couple of small questions that I need help with...
I am trying to add multiple values to the select/option form but when I do that the javascript function ends up only adding the last one - here are the details for you to check out -
function addFields1(){
var container = document.getElementById("container1");
container.appendChild(document.createTextNode("Institution Name: "));
var name = document.createElement("input");
name.type = "text";
name.id = "name";
name.name = "certificate";
name.size = 25;
name.maxlength = 25;
container.appendChild(name);
var select = document.createElement("select"); //? how do I fix this up
var option = document.createElement("option");
option.value = "College";
option.innerHTML = "College";
option.value = "Community College";
option.innerHTML = "Community College";
option.value = "High School";
option.innerHTML = "High School";
option.value = "Private";
option.innerHTML = "Private";
option.value = "University";
option.innerHTML = "University";
select.appendChild(option);
container.appendChild(select);
}
When I call the function the only value that shows up is the very last one ("University") - the remaining values are not even on the menu when it drops down.
Another (similar) problem I am having is appending <td> and <input> elements and not being able to print any data when the eventhandler is called -
Here's the code for that below -
function aFields1(){
var container1 = document.getElementById("container");
container1.appendChild(document.createTextNode("Company: "));
var td = document.createElement("td");
var company = document.createElement("input");
company.type = "text";
company.id = "company";
company.name = "company";
company.size = 15;
company.maxlength = 15;
td.appendChild(company);
container1.appendChild(td);
container1.appendChild(company);
}
When i remove the td variable and td element, the information prints properly but if I don't do that it doesn't show up at all! Is there something wrong with what I did in this second function?
With the option elements you actually need to re-run the document.createElement('option') otherwise javascript retains a reference to the originally added option element and only updates it (rather than appending a new element). This allows us to re-use the option variable.
The issue with the <td> element is similar... this line container1.appendChild(company); moves the company input element outside of the td element and into the container1 element.
I have cleaned up and fixed both of your functions:
function addFields1() {
var container = document.getElementById("container1");
container.appendChild(document.createTextNode("Institution Name: "));
var name = document.createElement("input");
name.type = "text";
name.id = "name";
name.name = "certificate";
name.size = 25;
name.maxlenth = 25;
container.appendChild(name);
//create select element and the option variable
var select = document.createElement("select");
var option;
//before each option element we reassign the option variable to a new option element and append it to the select before moving to the next option item
option = document.createElement("option");
option.value = "College";
option.innerHTML = "College";
select.appendChild(option);
option = document.createElement("option");
option.value = "Community College";
option.innerHTML = "Community College";
select.appendChild(option);
option = document.createElement("option");
option.value = "High School";
option.innerHTML = "High School";
select.appendChild(option);
option = document.createElement("option");
option.value = "Private";
option.innerHTML = "Private";
select.appendChild(option);
option = document.createElement("option");
option.value = "University";
option.innerHTML = "University";
select.appendChild(option);
//finally, we append the completed select element
container.appendChild(select);
}
function aFields1() {
var container1 = document.getElementById("container");
container1.appendChild(document.createTextNode("Company: "));
var td = document.createElement("td");
var company = document.createElement("input");
company.type = "text";
company.id = "company";
company.name = "company";
company.size = 15;
company.maxlenth = 15;
//append the company input element to the td element
td.appendChild(company);
//append the td element to the container1 element
container1.appendChild(td);
}
JSFIDDLE DEMO
I'm trying to populate number in select - option tag .But my script fills number at only one select tag
HTML :
<div class="form_row">
<label>Week Num</label>
<select class="form_select1" id="weeknum"></select>
<b class="bold1">  TO  </b>
<select class="form_select1" id="weeknum1"></select>
</div>
Javascript :
<script>
var select = document.getElementById("weeknum");
var select1 = document.getElementById("weeknum1");
for (var i = 52; i >= 1; i--) {
var option = document.createElement('option');
option.text = option.value = i;
select.add(option, 0);
select1.add(option, 0);
}
</script>
How do i achieve that ?
You can add an element only once to a parent node, so you need to create another option element:
var select = document.getElementById("weeknum");
var select1 = document.getElementById("weeknum1");
for (var i = 52; i >= 1; i--) {
var option = document.createElement('option');
option.text = option.value = i;
var option1 = document.createElement('option');
option1.text = option1.value = i;
select.add(option, 0);
select1.add(option1, 0);
}
Here's the JSFIddle.
Try this ...
var option1 = document.createElement('option');
option1.text = option1.value = i;
select.add(option1, 0);
var option2 = document.createElement('option');
option2.text = option2.value = i;
select1.add(option2, 0);
... creating a distinct "option" for each select list. The created elements cannot be reused.
You need to create a distinct option element for each list. A given DOM element can only be in one place in the DOM.
edit: I see it's already answered... well, my first answer :)
try this:
var select = document.getElementById("weeknum");
var select1 = document.getElementById("weeknum1");
for (var i = 52; i >= 1; i--) {
var option = document.createElement('option');
var option1 = document.createElement('option');
option.text = option.value = option1.text = option1.value = i;
select.add(option, 0);
select1.add(option1, 0);
}