Develop Reference

How to reset multiple select to its first value in Jquery

I have a select which contains options, I want to be able to resent each of the select to its first value onclick
$('.reset').on('click', function() {
$('food option:first').prop('selected', true);
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="box">
<select class="food">
<option value="" selected disabled>Select Food</option>
<option value="rice">Rice</option>
<option value="garri">Garri</option>
</select>
<input type="text" class="showfood">
<button class="reset">Reset Select</button>
</div>
<div class="box">
<select class="food">
<option value="" selected disabled>Select Food</option>
<option value="beans">Beans</option>
<option value="pear">pear</option>
</select>
<input type="text" class="showfood">
<button class="reset">Reset Select</button>
</div>
However, what this does is reset only the first select.

Your logic to reset is correct. The issue you have is that you need to find only the option related to the select within the same container as the clicked button. To achieve that you can use closest() and find(), like this:
$('.reset').on('click', function() {
$(this).closest('.box').find('.food option:first').prop('selected', true);
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="box">
<select class="food">
<option value="" selected disabled>Select Food</option>
<option value="rice">Rice</option>
<option value="garri">Garri</option>
</select>
<input type="text" class="showfood">
<button class="reset">Reset Select</button>
</div>
<div class="box">
<select class="food">
<option value="" selected disabled>Select Food</option>
<option value="beans">Beans</option>
<option value="pear">pear</option>
</select>
<input type="text" class="showfood">
<button class="reset" type="button">Reset Select</button>
</div>

How to set parameter values to a "onClick" function using javascript or jquery

I am trying to set parameters to onClick event inside a html button using javascript.
This is how html button looks like:
<button type="button" id="upload-button" onclick="uploadFileIGCSE('param1', 'param2', 'param3')" class="btn btn-success" aria-expanded="false">Upload</button>
param1 = should be the value from a html select element with id='year' and name='year'
param2 = should be the value from a html select element with id='grade' and name='grade'
param3 = should be the value from a html select element with id='subject' and name='subject'
These are the html select options
<div class="col-md-3">
<select id="year" name="year" class="form-control">
<option value="select" disabled="disabled">- Select Year -</option>
<option value="1">2001</option>
<option value="2">2002</option>
<option value="3">2003</option>
</select>
</div>
<div class="col-md-3">
<select id="grade" name="grade" class="form-control">
<option value="select" disabled="disabled">- Select Grade -</option>
<option value="1">Grade 5</option>
<option value="2">Grade 6</option>
<option value="3">Grade 7</option>
</select>
</div>
<div class="col-md-3">
<select id="subject" name="subject" class="form-control">
<option value="select" disabled="disabled">- Select Subject -</option>
<option value="1">Edexcel</option>
<option value="2">National</option>
<option value="3">Other</option>
</select>
</div>
I have no clue how to set values to param1, param2, param3
This is what I tried but it feels wrong.
$('#upload-button').val = $('#year').val;
Can someone please help me?
I need to set values for the parameters (param1, param2, param3) in the function uploadFileIGCSE('param1', 'param2', 'param3') using javascript or jquery
Thank you

I can understand your needs. if you really wanted to do this only with HTML element, here is the way.
<button type="button" id="upload-button"
onclick="uploadFileIGCSE(
document.querySelector('#year').value,
document.querySelector('#grade').value,
document.querySelector('#subject').value)"
class="btn btn-success" aria-expanded="false">Upload</button>
Here is the working example
function uploadFileIGCSE(val1, val2, val3){
document.querySelector('#log').innerHTML = `${val1}, ${val2}, ${val3}`
}
<div class="col-md-3">
<select id="year" name="year" class="form-control">
<option value="select" disabled="disabled">- Select Year -</option>
<option value="1">2001</option>
<option value="2">2002</option>
<option value="3">2003</option>
</select>
</div>
<div class="col-md-3">
<select id="grade" name="grade" class="form-control">
<option value="select" disabled="disabled">- Select Grade -</option>
<option value="1">Grade 5</option>
<option value="2">Grade 6</option>
<option value="3">Grade 7</option>
</select>
</div>
<div class="col-md-3">
<select id="subject" name="subject" class="form-control">
<option value="select" disabled="disabled">- Select Subject -</option>
<option value="1">Edexcel</option>
<option value="2">National</option>
<option value="3">Other</option>
</select>
</div>
<button type="button" id="upload-button"
onclick="uploadFileIGCSE(
document.querySelector('#year').value,
document.querySelector('#grade').value,
document.querySelector('#subject').value)"
class="btn btn-success" aria-expanded="false">Upload</button>
<p>log value : (<span id="log"></span>)</p>

You really shouldn't be using inline event listeners like onclick (for maintainability, security and separation of concerns reasons).
Instead, add the listener using the DOM API's HTMLElement.prototype.addEventListener():
document.getElementById('upload-button').addEventListener('click', function() {
uploadFileIGCSE(year.value, grade.value, subject.value);
})
function uploadFileIGCSE(x,y,z) {
console.log(x,y,z);
}
document.getElementById('upload-button').addEventListener('click', function() {
uploadFileIGCSE(year.value, grade.value, subject.value);
})
<div class="col-md-3">
<select id="year" name="year" class="form-control">
<option value="select" disabled="disabled">- Select Year -</option>
<option value="1">2001</option>
<option value="2">2002</option>
<option value="3">2003</option>
</select>
</div>
<div class="col-md-3">
<select id="grade" name="grade" class="form-control">
<option value="select" disabled="disabled">- Select Grade -</option>
<option value="1">Grade 5</option>
<option value="2">Grade 6</option>
<option value="3">Grade 7</option>
</select>
</div>
<div class="col-md-3">
<select id="subject" name="subject" class="form-control">
<option value="select" disabled="disabled">- Select Subject -</option>
<option value="1">Edexcel</option>
<option value="2">National</option>
<option value="3">Other</option>
</select>
</div>
<button type="button" id="upload-button">Upload</button>

try this
<button type="button" id="upload-button" onclick="getOption()" class="btn btn-success"
aria-expanded="false">Upload</button>
function getOption() {
var year = document.getElementById("year");
var year_option = year.options[year.selectedIndex].value;
var grade = document.getElementById("grade");
var grade_option = grade.options[grade.selectedIndex].value;
var subject = document.getElementById("subject");
var subject_option = subject.options[subject.selectedIndex].value;
uploadFileIGCSE(year_option, grade_option, subject_option)
}

$('#upload-button').click(function(e) {
var year = $('#year').val();
var grade = $('#grade').val();
var subject = $('#subject').val();
uploadFileIGCSE(year, grade, subject);
})
You could try something like this.

The click event can simply run an anonymous function. Its only input will be the default event object supplied by the DOM engine. That function can then gather the values from the various elements you're interested in, and make a further call to the uploadFileIGCSE function, passing those values as parameters.
Here's a demo. Note that I've used an unobtrusive event handler using addEventListener() in the JS code, rather than "onclick" within the HTML. This is generally considered to be better practice, as it makes the code easier to read, maintain and debug, and helps to separate the functionality from the presentation.
N.B. you could use jQuery for any/all of this, but equally it's not really necessary, it doesn't really add much value in this situation.
var button = document.getElementById("upload-button");
button.addEventListener("click", function(event) {
var year = document.getElementById("year").value;
var grade = document.getElementById("grade").value;
var subject = document.getElementById("subject").value;
uploadFileIGCSE(year, grade, subject);
});
function uploadFileIGCSE(year, grade, subject) {
console.log(year, grade, subject);
}
<button type="button" id="upload-button" onclick="uploadFileIGCSE('param1', 'param2', 'param3')" class="btn btn-success" aria-expanded="false">Upload</button>
<div class="col-md-3">
<select id="year" name="year" class="form-control">
<option value="select" disabled="disabled">- Select Year -</option>
<option value="1">2001</option>
<option value="2">2002</option>
<option value="3">2003</option>
</select>
</div>
<div class="col-md-3">
<select id="grade" name="grade" class="form-control">
<option value="select" disabled="disabled">- Select Grade -</option>
<option value="1">Grade 5</option>
<option value="2">Grade 6</option>
<option value="3">Grade 7</option>
</select>
</div>
<div class="col-md-3">
<select id="subject" name="subject" class="form-control">
<option value="select" disabled="disabled">- Select Subject -</option>
<option value="1">Edexcel</option>
<option value="2">National</option>
<option value="3">Other</option>
</select>
</div>

Get text from closest selected dropdown option with class on button click

I have many dropdowns, when I click the button I want it to look up the select option that is selected and alert me the text it says, like 'grape'.
It must use .closest, have tried many variations but cant seem to find it.....
<select name="div0" class="dropdowns">
<option value="orange">orange</option>
<option value="apple">apple</option>
<option value="grape">grape</option>
<option value="peas">peas</option>
</select>
<input type="button" name="mybutton" value="Edit Row">
<select name="div1" class="dropdowns">
<option value="orange">orange</option>
<option value="apple">apple</option>
<option value="grape">grape</option>
<option value="peas">peas</option>
</select>
<input type="button" name="mybutton" value="Edit Row" class="editrowbutton">
JQUERY (Nearest I can get)
$(document).on('click', '.editrowbutton', function() {
var thetext = $(this).closest('select').find('option:selected').text();
alert(thetext);
});

You are missing the class editrowbutton on your buttons in the example.
use .prev to get the previous element from target.
$(document).on('click', '.editrowbutton', function() {
var thetext = $(this).prev().find('option:selected').text();
alert(thetext);
});
http://jsfiddle.net/SeanWessell/wt00c2wu/
.closest looks up the tree at parents. Since the select is not a parent you will not return anything.
If you wanted to search the siblings you can use prev('selector') or next('selector') as well.
https://api.jquery.com/category/traversing/tree-traversal/

You can also use the data-* attribute, preventing DOM position mistakes.
$(function(){
$(document).on("click",'.editrowbutton',function(){
var target = $(this).data("select");
alert($('select[name='+target+'] option:selected').text())
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="div0" class="dropdowns">
<option value="orange">orange</option>
<option value="apple">apple</option>
<option value="grape">grape</option>
<option value="peas">peas</option>
</select>
<input type="button" name="mybutton" data-select="div0" class="editrowbutton" value="Edit Row">
<select name="div1" class="dropdowns">
<option value="orange">orange</option>
<option value="apple">apple</option>
<option value="grape">grape</option>
<option value="peas">peas</option>
</select>
<input type="button" name="mybutton" data-select="div1" class="editrowbutton" value="Edit Row">

Change the placeholder when the select option is changed using jQuery

I have a site with the same form in different spots on the page. I would like to be able to have a placeholder in a text input change when I change the select option. I have a JSFiddle with a kinda example: http://jsfiddle.net/y1jhhqLz/
All the forms look like this:
<form id="form1">
<select id="mySelect1" onClick="changePlaceHolder('#mySelect1','#myInput1')">
<option value='-1'>Form 1</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput1" type="text" placeholder="Form 1"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
And in this example, I would like to have the place holder change on the input with the id myInput, when I select the option Third.
I have tried many different ways to include the most recent attempt, which I put on the JSFiddle.
Any help would be greatly appreciated!

Set select onclick attribute to
onclick="changePlaceHolder(this,'#myInput1');"
and change javascript function to
function changePlaceHolder(dropdown, element) {
if (jQuery(dropdown).val() == "Third") {
jQuery(element).attr('placeholder', 'You did it correctly!');
} else {
jQuery(element).at}tr('placeholder', '');
}
}
in JSFiddle, you should set the loading behaviour to "no wrap - in head"
Done!

Add a change listener to the select, then get the value of the select and set the attribute placeholder to said value:
$('select').on('change',function(){
var place=$(this).val();
var num=$(this).attr('id').substring(8);
$('#myInput'+num).attr('placeholder',place);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<p>How do I get it so that when I click on the option that says Third Choice (for any form), it will put in the text box (with the form and number ) a placeholder: "You did it correctly"? But it shouldn't change any other form but the one where you change the select to the Third Choice option. I tried using a onClick function.
</p>
<br><br>
<h2>Please pick the third option from Form 1:</h2>
<form id="form1">
<select id="mySelect1" onClick="changePlaceHolder('#mySelect1','#myInput1')">
<option value='-1'>Form 1</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput1" type="text" placeholder="Form 1"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form2">
<select id="mySelect2">
<option value='-2'>Form 2</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput2" type="text" placeholder="Form 2"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form3">
<select id="mySelect3">
<option value='-3'>Form 3</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput3" type="text" placeholder="Form 3"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>

Several things going on. First, remove the onClick events (we are not looking for when the select is clicked but rather when it is changed) and instead use jQuery's on method. Now changePlaceHolder has access to this which is the actual select box which was changed.
See below:
jQuery('select').on('change input', changePlaceHolder);
function changePlaceHolder() {
//I have to use jQuery instead of $ because it is on a wordpress site
if (jQuery(this).val() == "Third") {
jQuery(this).next().attr("placeholder","You did it correctly!");
} else {
jQuery(this).next().attr("placeholder"," ");
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<h2>Please pick the third option from Form 1:</h2>
<form id="form1">
<select id="mySelect1" >
<option value='-1'>Form 1</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput1" type="text" placeholder="Form 1"/>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"/>
</form>
Other things to note: your <input> tags to not require an ending tag </input>, instead write them like this <input />. Note that the "/" ends the tag. You want to edit the input immediately following your select, in which case you can use jQuery(this).next() which will select the element immediately following the current this element.

For your specific case I would not touch source code, would define all functionality in script. Setting the onlick event inline is not a good idea, scripts should not go together with content.
I wrote this script having in mind that your select and input tags do not have to be siblings, the only condition is that both belong to same form:
/* This way you can use $ in your Wordpress */
(function ($) {
$('select').on('change', function(e) {
var thisSelect = $(this);
var thisSelectValue = thisSelect.val();
var thisInput = thisSelect.closest('form').find('input[id^=myInput]');
if (thisSelectValue == 'Third') {
thisInput.attr("placeholder", "You did it correctly!");
} else {
thisInput.attr("placeholder", "");
}
});
}(jQuery));
p {
max-width: 500px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<h2>Please pick the third option from Form 1:</h2>
<form id="form1">
<select id="mySelect1">
<option value='-1'>Form 1</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput1" type="text" placeholder="Form 1"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form2">
<select id="mySelect2">
<option value='-2'>Form 2</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput2" type="text" placeholder="Form 2"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form3">
<select id="mySelect3">
<option value='-3'>Form 3</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput3" type="text" placeholder="Form 3"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>

Please find the working code for you:
<!DOCTYPE html>
<html>
<body>
<script src="http://code.jquery.com/jquery-latest.min.js"
type="text/javascript"></script>
<script type="text/javascript">
function changePlaceHolder(element,target) {
alert(element);
if ( element == "Third") {
jQuery(target).attr("placeholder","You did it correctly!");
} else {
jQuery(target).attr("placeholder","");
}
}
</script>
<br><br>
<h2>Please pick the third option from Form 1:</h2>
<form id="form1">
<select id="mySelect1" name="mySelect1" onclick="changePlaceHolder( this.value ,'#myInput1' );">
<option value='-1'>Form 1</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput1" type="text" placeholder="Form 1"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form2">
<select id="mySelect2">
<option value='-2'>Form 2</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput2" type="text" placeholder="Form 2"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
<form id="form3">
<select id="mySelect3">
<option value='-3'>Form 3</option>
<option value='First'>First Choice</option>
<option value='Second'>Second Choice</option>
<option value='Third'>Third Choice</option>
</select>
<input id="myInput3" type="text" placeholder="Form 3"></input>
<input class="dontChangeME" type="text" placeholder="Don't Change This One!"></input>
</form>
</body>
</html>

Chaining an input option after a select?

I'm wondering how I can chain an input box after chaining a selection in my form.
I'm using http://www.appelsiini.net/projects/chained to chain my selects and it works. However, I need to adjust this to also allow for the chaining of an input. In the below example it would be someone would choose an option such has an item has Strength on it then the select menu of value options then input the value. I'm trying to also incorporate into this where after those 3 options of item, controller, value are inputed the user has the option to filter more so another box appear with the same options of strength, agility, etc. http://jsfiddle.net/isherwood/XMx4Q/ is an example of work I used to incorporate this into my own work.
<form id="myform" name="myform" method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
<div>
<label for="searchterm">Name:</label>
<input type="text" name="searchterm">
</div>
<div>
<div class="chainedSelectFilter">
<select name="specificFilter" class="attribute">
<option value="" selected>Select a Filter</option>
<option value="strength">Has Strength</option>
<option value="agility">Has Agility</option>
<option value="spirit">Has Spirit</option>
<option value="stamina">Has Stamina</option>
</select>
<select name="specificFilter" class="valueController">
<option value=">" selected>></option>
<option value=">=">>=</option>
<option value="=">=</option>
<option value="<="><=</option>
<option value="<"><</option>
</select>
</div>
</div>
</div>
<div>
<label for="submit"></label>
<input type="submit" name="submit" value="Filter">
</div>

Code reference below shows how to accomplish this. Here is jsFiddle that shows it's working.
HTML
<form id="myform">
<div class="container">
<select>
<option value=""></option>
<option value="one">one</option>
<option value="two">two</option>
</select>
<input type="text" class="chain" value="" placeholder="Type here"/>
</div>
<div class="container">
<select>
<option value=""></option>
<option value="one">one</option>
<option value="two">two</option>
</select>
<input type="text" class="chain" value="" placeholder="type here"/>
</div>
<div class="container">
<select>
<option value=""></option>
<option value="one">one</option>
<option value="two">two</option>
</select>
<input type="text" class="chain" value=""/>
</div>
</form>
JS
$('select').change(function () {
$(this).next('input').fadeIn();
});
$('body').on('keyup','input.chain',function () {
$(this).parent().next('div').fadeIn();
});