How to get the first value to be default value. In the select option values I have taken a loop for the multiple values. Now I want to select the first values by default but in a way that the last value is always selected by default. How do I do this?
try <option value="1" selected="selected">xyz</option>
use selected attribute for your first option
Try this, add the selected attribute to the option u want to be selected
<select>
<option selected="selected" value="1">selected option1</option>
<option value="2">option2</option>
<option value="3">option3</option>
</select>
Related
In the HTML, I got something like this for select.
What it's doing is the default value showing for the select dropdown is Select year but it cannot be selected.
<select>
<option disabled hidden selected>
Select Year
</option>
<option value="2021">2021</option>
</select>
But when I implement it in React.
It giving me this error
Use the defaultValue or value props on instead of setting selected on .
But when I use default value or value the SELECT YEAR option is not there anymore.
All you need is to remove both selected and disabled attributes from first <option>:
<select>
<option hidden>Select Year</option>
<option value="2021">2021</option>
</select>
Here's why:
<select> is shorthand for <select defaultValue={undefined}>, which makes the first <option> with a value of undefined get selected. In your case, that's the first <option>, since it doesn't have a set value, which is equivalent to having a value set to undefined.
Probably the most important bit is removing disabled. Remember this is JSX, not HTML. JSX is used by React to create valid HTML. If you specify disabled attribute, React won't allow that <option> to be selected, regardless of method.
But you want that <option> selected by default, so it doesn't make sense to disable it.
You only want the user not to be able to select it, which is exactly what the hidden attribute does.
Working demo.
I've made a select in html that looks like this <select name='select' id='select'><option value='val1'>Val1</option><option value='val2'>Val2</option></select>. Is there a way to set the default value of select to something like "pick a value"? Not as an option, but just the text of the select.
You can use the selected attribute within the option to select a default response. If you add the option disabled and hidden then this will be an invalid option.
<select name='select' id='select'>
<option value='val1' selected disabled hidden>Choose option</option>
<option value='val1'>Val1</option>
<option value='val2'>Val2</option>
</select>
Why not just have another option that doesn't have a value and give it the option of selected?
<select name='select' id='select'>
<option value='val1'>Val1</option>
<option value='val2'>Val2</option>
<option value='' selected>Choose Value</option>
</select>
Then in your php or whatever server side test to make sure you aren't accepting an empty value, or use js to not allow the form to submit if the value is blank?
I'm looking for a way to set a default value (in a select list) that has to be switched out of in order for the 'required=""' attribute to be accepted and for the form to be submitted. In other words the default value can't stay as the chosen value. Also, how would one add titles to a select list that can not be chosen and are meant as a way of labeling the select options. Everything I am looking for is shown in the image below in case of confusion.
In other words the default value can't stay as the chosen value.
About this request, you could find this helpful.
<form action="/action_page.php">
<select id="mySelect" required onchange="changeValue()">
<option value="">Select a Country</option>
<option value="c1">Country 1</option>
<option selected value="c2">Country 2</option>
<option value="c3">Country 3</option>
<option value="c4">COuntry 4</option>
</select>
<input id="btnSubmit" type="submit" disabled>
</form>
<script>
function changeValue(){
if (document.getElementById("mySelect").value != "")
document.getElementById("btnSubmit").disabled = false;
}
</script>
If your selected value changes (just after the first time) and it's different from "", the submit button will be valid. This can also be accomplished with a flag instead of setting the property disable, it depends on what you need to do.
You could try checking with javascript if the value = ""
Example from w3Schools.com:
https://www.w3schools.com/js/js_validation.asp
Make sure you also validate on the server side! people could change the HTML / Javascript
, I know we can set default option value by using selected in option's attribute.
But Is there any way to set a default value of option from attribute in select tag . i.e when i open page that value should be selected itself , and i want to do this in select tag
Something like this
<select selected= "saab">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="vw">VW</option>
<option value="audi" >Audi</option>
</select>
No. The only way, in HTML, to set the default option is to use the selected attribute on the option.
This avoids the need to provide id attributes for options (given that multiple options can share the same value) and it also because a select element can have multiple options selected at the same time (if the multiple attribute is set).
I think I may have a unique issue, or at least I cannot seem to find an answer anywhere on the internet. I have a FORM that when a selection is made on a select option above it choose the next select option to show. So basically I have multiple select options with the same name but only one group of select options shows up depending on what I selected on the choice before it. The problem is that when I make a selection to a select option in the first group, the result (value) always shows up as the first option in the last select statement with the same name. Here is a snippet:
<label for="mainIssue" id="mainIssueLabel" class="labelTitle" style="display:none;">Main Issue:</label>
<select name="mainIssue" id="warrantyFiltrationType" style="display:none;">
<option value="Type Filtration">Select One</option>
<option value="CP2000">CP2000</option>
<option value="RX">RX</option>
<option value="SFS">SFS</option>
<option value="SFX">SFX</option>
<option value="RP">RP</option>
<option value="Sand">SAND</option>
</select>
<select name="mainIssue" id="warrantyPumpType" style="display:none;">
<option value="Type Pump">Select One</option>
<option value="F350C">F350C</option>
<option value="F400C">F400C</option>
<option value="F600C-9">F600C GFCI 9</option>
<option value="F600C-18">F600C GFCI 18</option>
<option value="F700800C">F700C/800C</option>
<option value="F1000C">F1000C</option>
<option value="F1500C">F1500C</option>
<option value="F2000C">F2000C</option>
<option value="X600">X600</option>
<option value="X1000">X1000</option>
<option value="X1500">X1500</option>
<option value="CP2000C">CP2000C</option>
</select>
Say the select that comes up is the filtration select options. No matter which option I choose in the filtration selection, the value always shows up as value "Type Pump", or the first option in the last selection with the same name.
It appears that even though the correct selection options are showing, only the last selection option group is being read.
Any clues?
As stated by #David, if your intention is to post the data and you want all select fields with the same name to post the data to the server, then you need to use unique names...
OR...
In the name attribute, you need to append a [] to the end of the name that is the same across multiple selects / inputs.
An example of this which uses your code is as follows
<select name="mainIssue[]" id="warrantyPumpType" style="display:none;">
Note that this will post to the server where mainIssue is an array of each of the datasets.
Note that another small change may be what your looking for..
<select name="mainIssue['warrantyFiltrationType']" id="warrantyFiltrationType" style="display:none;">
and
<select name="mainIssue['warrantyPumpType']" id="warrantyPumpType" style="display:none;">
Note that all I did here was throw your id's into the square brackets to "name those keys". When this is posted to the server, your $_POST data (assuming your using php to capture the post), will be a multi-array where $_POST['mainIssue'] is an array with the key => values your expecting.
-EDIT-
To take this further, you would probably want your "Select One" option's value to be null or empty...
...And on the server, you would simply check for the mainIssue['specificKey'] which has a value that is not empty. With this method, you can then take the single selected value (from which ever select that it was selected in) and store it into the single DB field you need it in.
-EDIT-
An example in php side would be to loop over the array that came in, and simply check.
$mainIssue = ''; // This is what ever you want to default to before checking for the value of mainIssue
foreach($_POST['mainIssue'] as $key => $value) {
if($value != '') { // If the value is empty, then they did not select an item in that specific select field
$mainIssue = $value; // If the value was selected, then there would be a non-empty value somewhere in the multi-dimension array of mainIssue, and here is where we capture it
}
}
// So at this point of the code $mainIssue variable has a value of what ever was selected, else what ever the default was set before the loop above
You would want to make sure your "Select One" option's value attribute is empty for this to work (for all your selects which have the same name)
<select name="mainIssue[]" id="warrantyFiltrationType" style="display:none;">
<option value="">Select One</option>
<option value="CP2000">CP2000</option>
<option value="RX">RX</option>
<option value="SFS">SFS</option>
<option value="SFX">SFX</option>
<option value="RP">RP</option>
<option value="Sand">SAND</option>
</select>
You have multiple form elements with the same name:
<select name="mainIssue"
...
<select name="mainIssue"
When posting a form to the server, the name of any given element is the "key" in its "key/value pair". Thus, it must be unique in that form post. As the browser builds the form post, any element it finds with the same name as a previous element is going to overwrite that one in the form post. (This behavior may be undefined and browser-specific.)
Basically, give your form input elements unique names. You can do this by either:
Having multiple select elements with unique names.
Having a single select element which you dynamically re-populate with options based on user selection.