Tìm kiếm cho:
I'm using placeholders for text inputs which is working out just fine. But I'd like to use a placeholder for my selectboxes as well. Of course I can just use this code:
<select>
<option value="">Select your option</option>
<option value="hurr">Durr</option>
</select>
But the 'Select your option' is in black instead of lightgrey. So my solution could possibly be CSS-based. jQuery is fine too.
This only makes the option grey in the dropdown (so after clicking the arrow):
option:first {
color: #999;
}
The question is: How do people create placeholders in selectboxes? But it has already been answered, cheers.
And using this results in the selected value always being grey (even after selecting a real option):
select {
color: #999;
}
A non-CSS - no JavaScript/jQuery answer:
<label>Option name
<select>
<option value="" disabled selected>Select your option</option>
<option value="hurr">Durr</option>
</select>
</label>Update (December 2021):
This works for latest Firefox, Chrome, and Safari. It used to not work for many browsers in the past, as pointed out in the comments.
Answered 2023-09-20 21:00:56
use the 'defaultvalue' or 'value' props on <select> instead of setting 'selected' on <option>. To remove that warning, you would remove selected from <option> and instead on <select> add the attribute defaultValue='default' then on <option> add value='default' for the option you want shown by default. Both values in value and defaultValue must match up. - anyone Here's what works in Firefox and Chrome (at least):
<style>
select:invalid { color: gray; }
</style>
<form>
<select required>
<option value="" disabled selected hidden>Please Choose...</option>
<option value="0">Open when powered (most valves do this)</option>
<option value="1">Closed when powered, auto-opens when power is cut</option>
</select>
</form>The disabled attribute stops the <option> from being selected with either mouse or keyboard; if you just used 'display:none', it allows the user to select it via keyboard navigation.
Using an empty value attribute on the "placeholder" option allows validation (via the required attribute) to work around having the "placeholder", so if the option isn't changed, but is required, the browser should prompt the user to choose an option from the list.
When the select element has the required attribute, it allows use of the :invalid CSS pseudo-class which allows you to style the select element when in its "placeholder" state. :invalid works here because of the empty value in the placeholder option.
Once a value has been set, the :invalid pseudo-class will be dropped. You can optionally also use :valid if you so wish.
This works best with custom styled select elements; in some cases i.e. (Mac in Chrome / Safari) you'll need to change the default appearance of the select box so that certain styles display, i.e., background-color and color. You can find some examples and more about compatibility at developer.mozilla.org.
Native element appearance Mac in Chrome:
Using altered border element Mac in Chrome:
Answered 2023-09-20 21:00:56
select option { color: black; } - anyone For a required field, there is a pure-CSS solution in modern browsers:
select:required:invalid {
color: gray;
}
option[value=""][disabled] {
display: none;
}
option {
color: black;
}<select required>
<option value="" disabled selected>Select something...</option>
<option value="1">One</option>
<option value="2">Two</option>
</select>Answered 2023-09-20 21:00:56
Something like this:
HTML:
<select id="choice">
<option value="0" selected="selected">Choose...</option>
<option value="1">Something</option>
<option value="2">Something else</option>
<option value="3">Another choice</option>
</select>
CSS:
#choice option { color: black; }
.empty { color: gray; }
JavaScript:
$("#choice").change(function () {
if($(this).val() == "0") $(this).addClass("empty");
else $(this).removeClass("empty")
});
$("#choice").change();
Working example: http://jsfiddle.net/Zmf6t/
Answered 2023-09-20 21:00:56
I just added a hidden attribute in an option like below. It is working fine for me.
<select>
<option hidden>Sex</option>
<option>Male</option>
<option>Female</option>
</select>Answered 2023-09-20 21:00:56
The solution below works without any JavaScript:
option[default] {
display: none;
}<select>
<option value="" default selected>Select Your Age</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>It hides the default option once you've selected a different one, so you won't be able to re-select the default option afterward.
Answered 2023-09-20 21:00:56
There isn't any need for any JavaScript or CSS, just three attributes:
<select>
<option selected disabled hidden>Default Value</option>
<option>Value 1</option>
<option>Value 2</option>
<option>Value 3</option>
<option>Value 4</option>
</select>
It doesn't show the option at all; it just sets the option's value as the default.
However, if you just don't like a placeholder that's the same color as the rest, you can fix it inline like this:
<!DOCTYPE html>
<html>
<head>
<title>Placeholder for select tag drop-down menu</title>
</head>
<body onload="document.getElementById('mySelect').selectedIndex = 0">
<select id="mySelect" onchange="document.getElementById('mySelect').style.color = 'black'" style="color: gray; width: 150px;">
<option value="" hidden>Select your beverage</option> <!-- placeholder -->
<option value="water" style="color:black" >Water</option>
<option value="milk" style="color:black" >Milk</option>
<option value="soda" style="color:black" >Soda</option>
</select>
</body>
</html>
Obviously, you can separated the functions and at least the select's CSS into separate files.
Note: the onload function corrects a refresh bug.
Answered 2023-09-20 21:00:56
Here is a good solution that worked for me:
HTML:
<select class="place_holder dropdown">
<option selected="selected" style=" display: none;">Sort by</option>
<option>two</option>
<option>something</option>
<option>4</option>
<option>5</option>
</select>
CSS:
.place_holder {
color: gray;
}
option {
color: #000000;
}
JavaScript (jQuery):
jQuery(".dropdown").change(function () {
jQuery(this).removeClass("place_holder");
});
After the customer makes the first select, there isn't any need for gray color, so the JavaScript code removes the class place_holder.
As a workaround for Internet Explorer, you can add the place_holder class again in case the first option is selected again.
Answered 2023-09-20 21:00:56
The user should not see the placeholder in select options. I suggest to use the hidden attribute for the placeholder option, and you don't need the selected attribute for this option. You can just put it as the first.
select:not(:valid) {
color: #999;
}<select required>
<option value="" hidden>Select your option</option>
<option value="0">First option</option>
<option value="1">Second option</option>
</select>Answered 2023-09-20 21:00:56
selected makes the particular option selected on page loaddisabled ensures the option is excluded in the form submissionhidden visually hides the option in the dropdown list <select>
<option selected disabled hidden>Choose an Option</option>
<option>One</option>
<option>Two</option>
<option>Three</option>
</select>Answered 2023-09-20 21:00:56
Here I have modified David's answer (accepted answer). On his answer, he put disabled and selected attribute on the option tag, but when we also put hidden tag then it will look much better.
By adding an extra hidden attribute on the option tag, it will prevent the "Select your option" option from being re-selecting after the "Durr" option is selected.
<select>
<option value="" disabled selected hidden>Select your option</option>
<option value="hurr">Durr</option>
</select>Answered 2023-09-20 21:00:56
select:focus option.holder {
display: none;
}<select>
<option selected="selected" class="holder">Please select</option>
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>Answered 2023-09-20 21:00:56
I see signs of correct answers, but to bring it all together, this would be my solution:
select {
color: grey;
}
option {
color: black;
}
option[default] {
display: none;
}<select>
<option value="" default selected>Select your option</option>
<option value="hurr">Durr</option>
</select>Answered 2023-09-20 21:00:56
There is Cool property in HTML and you can use it to create a Placeholder for select attribute In my case I am using following code and you can change it according to your requirements
<select ref={relationship} required className="sellertype">
<option value="" disabled selected hidden>Select Your Seller Type</option>
<option value="1">Importer</option>
<option value="2">Exporter</option>
<option value="3">Local Seller</option>
<option value="4">Local Buyer</option>
</select>
Now "Select your Seller Type" will work as a placeholder
Answered 2023-09-20 21:00:56
If you are using Angular, go like this:
<select>
<option [ngValue]="undefined" disabled selected>Select your option</option>
<option [ngValue]="hurr">Durr</option>
</select>Answered 2023-09-20 21:00:56
This HTML + CSS solution worked for me:
form select:invalid {
color: gray;
}
form select option:first-child {
color: gray;
}
form select:invalid option:not(:first-child) {
color: black;
}<form>
<select required>
<option value="">Select Planet...</option>
<option value="earth">Earth</option>
<option value="pandora">Pandora</option>
</select>
</form>Answered 2023-09-20 21:00:56
You could set the first option's color to gray, set it's display to none, set the select's color to gray, and add an input event listener to it that sets it's color to black.
select > option:not(:first-of-type) {
color: black;
}<select style='color:gray' oninput='style.color="black"'>
<option style='display:none'>
Choose an option
</option>
<option>
1
</option>
<option>
2
</option>
<option>
3
</option>
</select>Using the customElement API:
class placeholderSelect extends HTMLElement {
connectedCallback() {
this.innerHTML = `<select style='color:gray' oninput='style.color="black"'>
<option style='display:none'>
${this.getAttribute('data-placeholder')}
</option>
${this.innerHTML}
</select>`;
Array.from(this.children[0].children).forEach(function(el, i) {
el.style.color = 'black';
});
}
}
customElements.define('placeholder-select', placeholderSelect);<placeholder-select data-placeholder='Choose an option'>
<option>
1
</option>
<option>
2
</option>
<option>
3
</option>
</placeholder-select>Answered 2023-09-20 21:00:56
[type="text"] Style Placeholder for Select ElementsThe following solution simulates a placeholder as it relates to an input[type="text"] element:
$('.example').change(function () {
$(this).css('color', $(this).val() === '' ? '#999' : '#555');
});.example {
color: #999;
}
.example > option {
color: #555;
}
.example > option[value=""] {
color: #999;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="example">
<option value="">Select Option</option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>Answered 2023-09-20 21:00:56
Another possibility in JavaScript:
$('body').on('change', 'select', function (ev){
if($(this).find('option:selected').val() == ""){
$(this).css('color', '#999');
$(this).children().css('color', 'black');
}
else {
$(this).css('color', 'black');
$(this).children().css('color', 'black');
}
});
Answered 2023-09-20 21:00:56
Building upon MattW's answer, you can make the select placeholder option visible in the drop-down menu after a valid selection has been made, by conditionally hiding it only while the placeholder remains selected (and the select is therefore :invalid).
select:required:invalid {
color: gray;
}
select:invalid > option[value=""][disabled] {
display: none;
}
option {
color: black;
}<select required>
<option value="" disabled selected>Select something...</option>
<option value="1">One</option>
<option value="2">Two</option>
</select>Answered 2023-09-20 21:00:56
This works well for me:
<select class="form-control">
<option value="" readonly="true" hidden="true" selected>Select your option</option>
<option value="1">Something</option>
<option value="2">Something else</option>
<option value="3">Another choice</option>
</select>
Answered 2023-09-20 21:00:56
Solution for 2023 with :has selector:
select:has(option:disabled:checked[hidden]) {
color: gray;
}
select option {
color: black;
}<select>
<option selected disabled hidden>Choose</option>
<option>One</option>
<option>Two</option>
<option>Three</option>
</select>Answered 2023-09-20 21:00:56
<select> to show a placeholder style whenever the select has an empty value, similar to how a <input type="text"> works. This allows you to select an option that effectively clears the <select> select:has(option[value=""]:checked) - anyone I wanted the SELECT to be grey until selected so for this piece of HTML:
<select>
<option value="" disabled selected>Select your option</option>
<option value="hurr">Durr</option>
</select>
I've added these CSS definitions:
select { color: grey; }
select:valid { color: black; }
It works as expected in Chrome / Safari and maybe also in other browsers, but I haven't checked.
Answered 2023-09-20 21:00:56
Here is a CSS solution that works beautifully. The content is added (and absolutely positioned relative to the container) after the containing element (via :after pseudo-class).
It gets its text from the placeholder attribute that I defined where I used the directive (attr(placeholder)). Another key factor is pointer-events: none - this allows clicks on the placeholder text to pass through to the select. Otherwise it won't drop down if the user clicks the text.
I add the .empty class myself in my select directive, but normally I find that angular adds/removes .ng-empty for me (I assume it's because I'm injecting version 1.2 of Angular in my code sample).
(The sample also demonstrates how to wrap HTML elements in AngularJS to create your own custom inputs)
var app = angular.module("soDemo", []);
app.controller("soDemoController", function($scope) {
var vm = {};
vm.names = [{
id: 1,
name: 'Jon'
},
{
id: 2,
name: 'Joe'
}, {
id: 3,
name: 'Bob'
}, {
id: 4,
name: 'Jane'
}
];
vm.nameId;
$scope.vm = vm;
});
app.directive('soSelect', function soSelect() {
var directive = {
restrict: 'E',
require: 'ngModel',
scope: {
'valueProperty': '@',
'displayProperty': '@',
'modelProperty': '=',
'source': '=',
},
link: link,
template: getTemplate
};
return directive;
/////////////////////////////////
function link(scope, element, attrs, ngModelController) {
init();
return;
///////////// IMPLEMENTATION
function init() {
initDataBinding();
}
function initDataBinding() {
ngModelController.$render = function() {
if (scope.model === ngModelController.$viewValue) return;
scope.model = ngModelController.$viewValue;
}
scope.$watch('model', function(newValue) {
if (newValue === undefined) {
element.addClass('empty');
return;
}
element.removeClass('empty');
ngModelController.$setViewValue(newValue);
});
}
}
function getTemplate(element, attrs) {
var attributes = [
'ng-model="model"',
'ng-required="true"'
];
if (angular.isDefined(attrs.placeholder)) {
attributes.push('placeholder="{{placeholder}}"');
}
var ngOptions = '';
if (angular.isDefined(attrs.valueProperty)) {
ngOptions += 'item.' + attrs.valueProperty + ' as ';
}
ngOptions += 'item.' + attrs.displayProperty + ' for item in source';
ngOptions += '"';
attributes.push('ng-options="' + ngOptions + '"');
var html = '<select ' + attributes.join(' ') + '></select>';
return html;
}
});so-select {
position: relative;
}
so-select select {
font-family: 'Helvetica';
display: inline-block;
height: 24px;
width: 200px;
padding: 0 1px;
font-size: 12px;
color: #222;
border: 1px solid #c7c7c7;
border-radius: 4px;
}
so-select.empty:before {
font-family: 'Helvetica';
font-size: 12px;
content: attr(placeholder);
position: absolute;
pointer-events: none;
left: 6px;
top: 3px;
z-index: 0;
color: #888;
}<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="soDemo" ng-controller="soDemoController">
<so-select value-property="id" display-property="name" source="vm.names" ng-model="vm.nameId" placeholder="(select name)"></so-select>
</div>Answered 2023-09-20 21:00:56
I couldn't get any of these to work currently, because for me it is (1) not required and (2) need the option to return to default selectable. So here's a heavy handed option if you are using jQuery:
var $selects = $('select');
$selects.change(function () {
var option = $('option:default', this);
if(option && option.is(':selected')) {
$(this).css('color', '#999');
}
else {
$(this).css('color', '#555');
}
});
$selects.each(function() {
$(this).change();
});option {
color: #555;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="in-op">
<option default selected>Select Option</option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>Answered 2023-09-20 21:00:56
required attribute on the select field to take advantage of the :invalid CSS while also adding an ignore class to it and then configuring the ignore property in the validate() options (see jqueryvalidation.org/validate) - anyone I'm not content with HTML/CSS-only solutions, so I've decided to create a custom select using JavaScript.
This is something I've written in the past 30 mins, thus it can be further improved.
All you have to do is create a simple list with few data attributes. The code automatically turns the list into a selectable dropdown. It also adds a hidden input to hold the selected value, so it can be used in a form.
Input:
<ul class="select" data-placeholder="Role" data-name="role">
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
Output:
<div class="ul-select-container">
<input type="hidden" name="role" class="hidden">
<div class="selected placeholder">
<span class="text">Role</span>
<span class="icon">▼</span>
</div>
<ul class="select" data-placeholder="Role" data-name="role">
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
</div>
The text of the item that's supposed to be a placeholder is grayed out. The placeholder is selectable, in case the user wants to revert his/her choice. Also using CSS, all the drawbacks of select can be overcome (e.g., inability of the styling of the options).
// Helper function to create elements faster/easier
// https://github.com/akinuri/js-lib/blob/master/element.js
var elem = function(tagName, attributes, children, isHTML) {
let parent;
if (typeof tagName == "string") {
parent = document.createElement(tagName);
} else if (tagName instanceof HTMLElement) {
parent = tagName;
}
if (attributes) {
for (let attribute in attributes) {
parent.setAttribute(attribute, attributes[attribute]);
}
}
var isHTML = isHTML || null;
if (children || children == 0) {
elem.append(parent, children, isHTML);
}
return parent;
};
elem.append = function(parent, children, isHTML) {
if (parent instanceof HTMLTextAreaElement || parent instanceof HTMLInputElement) {
if (children instanceof Text || typeof children == "string" || typeof children == "number") {
parent.value = children;
} else if (children instanceof Array) {
children.forEach(function(child) {
elem.append(parent, child);
});
} else if (typeof children == "function") {
elem.append(parent, children());
}
} else {
if (children instanceof HTMLElement || children instanceof Text) {
parent.appendChild(children);
} else if (typeof children == "string" || typeof children == "number") {
if (isHTML) {
parent.innerHTML += children;
} else {
parent.appendChild(document.createTextNode(children));
}
} else if (children instanceof Array) {
children.forEach(function(child) {
elem.append(parent, child);
});
} else if (typeof children == "function") {
elem.append(parent, children());
}
}
};
// Initialize all selects on the page
$("ul.select").each(function() {
var parent = this.parentElement;
var refElem = this.nextElementSibling;
var container = elem("div", {"class": "ul-select-container"});
var hidden = elem("input", {"type": "hidden", "name": this.dataset.name, "class": "hidden"});
var selected = elem("div", {"class": "selected placeholder"}, [
elem("span", {"class": "text"}, this.dataset.placeholder),
elem("span", {"class": "icon"}, "▼", true),
]);
var placeholder = elem("li", {"class": "placeholder"}, this.dataset.placeholder);
this.insertBefore(placeholder, this.children[0]);
container.appendChild(hidden);
container.appendChild(selected);
container.appendChild(this);
parent.insertBefore(container, refElem);
});
// Update necessary elements with the selected option
$(".ul-select-container ul li").on("click", function() {
var text = this.innerText;
var value = this.dataset.value || "";
var selected = this.parentElement.previousElementSibling;
var hidden = selected.previousElementSibling;
hidden.value = selected.dataset.value = value;
selected.children[0].innerText = text;
if (this.classList.contains("placeholder")) {
selected.classList.add("placeholder");
} else {
selected.classList.remove("placeholder");
}
selected.parentElement.classList.remove("visible");
});
// Open select dropdown
$(".ul-select-container .selected").on("click", function() {
if (this.parentElement.classList.contains("visible")) {
this.parentElement.classList.remove("visible");
} else {
this.parentElement.classList.add("visible");
}
});
// Close select when focus is lost
$(document).on("click", function(e) {
var container = $(e.target).closest(".ul-select-container");
if (container.length == 0) {
$(".ul-select-container.visible").removeClass("visible");
}
});.ul-select-container {
width: 200px;
display: table;
position: relative;
margin: 1em 0;
}
.ul-select-container.visible ul {
display: block;
padding: 0;
list-style: none;
margin: 0;
}
.ul-select-container ul {
background-color: white;
border: 1px solid hsla(0, 0%, 60%);
border-top: none;
-webkit-user-select: none;
display: none;
position: absolute;
width: 100%;
z-index: 999;
}
.ul-select-container ul li {
padding: 2px 5px;
}
.ul-select-container ul li.placeholder {
opacity: 0.5;
}
.ul-select-container ul li:hover {
background-color: dodgerblue;
color: white;
}
.ul-select-container ul li.placeholder:hover {
background-color: rgba(0, 0, 0, .1);
color: initial;
}
.ul-select-container .selected {
background-color: white;
padding: 3px 10px 4px;
padding: 2px 5px;
border: 1px solid hsla(0, 0%, 60%);
-webkit-user-select: none;
}
.ul-select-container .selected {
display: flex;
justify-content: space-between;
}
.ul-select-container .selected.placeholder .text {
color: rgba(0, 0, 0, .5);
}
.ul-select-container .selected .icon {
font-size: .7em;
display: flex;
align-items: center;
opacity: 0.8;
}
.ul-select-container:hover .selected {
border: 1px solid hsla(0, 0%, 30%);
}
.ul-select-container:hover .selected .icon {
opacity: 1;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="select" data-placeholder="Role" data-name="role">
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
<ul class="select" data-placeholder="Sex" data-name="sex">
<li data-value="male">Male</li>
<li data-value="female">Female</li>
</ul>Update: I've improved this (selection using up/down/enter keys), tidied up the output a little bit, and turned this into a object. Current output:
<div class="li-select-container">
<input type="text" readonly="" placeholder="Role" title="Role">
<span class="arrow">▼</span>
<ul class="select">
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li data-value="user">User</li>
</ul>
</div>
Initialization:
new Liselect(document.getElementsByTagName("ul")[0]);
For further examination: JSFiddle, GitHub (renamed).
Update: I am have rewritten this again. Instead of using a list, we can just use a select. This way it'll work even without JavaScript (in case it's disabled).
Input:
<select name="role" data-placeholder="Role" required title="Role">
<option value="admin">Administrator</option>
<option value="mod">Moderator</option>
<option>User</option>
</select>
new Advancelect(document.getElementsByTagName("select")[0]);
Output:
<div class="advanced-select">
<input type="text" readonly="" placeholder="Role" title="Role" required="" name="role">
<span class="arrow">▼</span>
<ul>
<li class="placeholder">Role</li>
<li data-value="admin">Administrator</li>
<li data-value="mod">Moderator</li>
<li>User</li>
</ul>
</div>
Answered 2023-09-20 21:00:56
I love the accepted solution, and it works great without JavaScript.
I just want to add how I adopted this answer for a controlled-select React Component, because it took me a few tries to figure it out. It would be really simple to incorporate react-select and be done with it, but unless you need the amazing functionality this repository provides, which I don't for the project in question, there is no need to add any more kilobytes to my bundle. Note, react-select handles placeholders in selects through a complex system of various inputs and html elements.
In React, for a controlled component, you cannot add the selected attribute to your options. React handles the state of the select via a value attribute upon the select itself, along with a change handler, where the value should match one of the value attributes within the options themselves.
Such as, for example
<select value={this.state.selectValue} onChange={this.handleChange} required={true}>
{options}
</select>
Since it would be improper and in fact would throw an error to add the selected attribute to one of the options, what then?
The answer is simple once you think about it. Since we want our first option to be selected as well as disabled and hidden, we need to do three things:
hidden and disabled attribute to the first defined option.option to be an empty string.select to also be an empty string.state = { selectValue = "" } // State or props or their equivalent
// In the render function
<select value={this.state.selectValue} onChange={this.handleChange} required={true}>
<option key="someKey" value="" disabled="disabled" hidden="hidden">Select from Below</option>
{renderOptions()}
</select>
Now you can style the select as indicated above (or via a className if you prefer).
select:invalid { color: gray; }
Answered 2023-09-20 21:00:56
You need form validation and modern browsers offer this from scratch.
So you do not need to take care that the user can not select the field. Because when he is doing it, the browser validation will tell him, that this is a wrong selection.
The browser built in validation function checkValidity().
Bootstrap has there a nice example as well.
HTML
<form class="needs-validation">
<select required>
<option value="">Please select an option</option>
<option value="1">Foo</option>
<option value="2">Bar</option>
</select>
<form>
Javascript
form = document.getElementByClassName('needs-validation');
if(form.checkValidity() === true) {
//form validation succeeded
} else {
//form validation failed
}
Answered 2023-09-20 21:00:56
Because of the diverse styling and functionality between answers provided in this thread, the table of below clarifies the styling and applicable form logic for each of the HTML, HTML+CSS and HTML+CSS+Javascript solutions provided.
I've had to use code formatting because tables aren't permitted in markup, for some reason.
A HTML table will be provided using the code snippet to work around the table restriction.
I've marked this post as community wiki so anyone can detail new posts, though please add JQuery, React, Angular, CoffeeScript, etc, to an alternate post to keep this table simple.
| Technologies | Styling |
Post | CSS | Java- | Select: Placeholder | Select: valid option | Option: placeholder | Option: valid option |
ID | | script | Color | Validation | Color | Required | Visibility | Selectable | Color | Cond. formatting | Color | Cond. formatting |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
41167307 | No | No | Black | Invalid | Black | Yes | Visible | No | Grey | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
50200912 | No | No | Black | Valid | Black | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
5859221 | No | No | Black | Valid | Black | No | Visible | No | Grey | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
38120777 | No | No | Black | Valid | Black | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
54860799 | Yes | No | Grey | Invalid | Black | Yes | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
52661024 | Yes | No | Grey | Invalid | Black | Yes | Invisible | N/A | N/A | No | Black | select:invalid{Grey} |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
8442831 | Yes | No | Grey | Invalid | Black | Yes | Invisible | N/A | N/A | No | Black | select:invalid{Grey} |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
29806043 | Yes | No | Grey | Invalid | Black | Yes | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
61966461 | Yes | No | Grey | Invalid | Black | Yes | Invisible | N/A | N/A | select:valid{visible} | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
44406771 | Yes | No | Grey | Invalid | Grey | No | Visible | No | Grey | No | Black | select:invalid{Grey} |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
40603035 | Yes | No | Black | Valid | Black | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
22994211 | Yes | No | Grey | Valid | Black | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
21722343 | Yes | No | Grey | Valid | Grey | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
48960650 | Yes | Yes | Grey | Invalid | Black | No | Invisible | N/A | N/A | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
5805194 | Yes | Yes | Grey | Valid | Black | No | Visible | Yes | Black | No | Black | No |
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
50840409 | Yes | Yes | Grey | Valid | Black | Yes | Visible | Yes | Grey | No | Black | No |
Answered 2023-09-20 21:00:56
You can do this without using JavaScript and using only HTML You need to set the default select option disabled="" and selected="" and select tag required="". Browsers don't allow the user to submit the form without selecting an option.
<form action="" method="POST">
<select name="in-op" required="">
<option disabled="" selected="">Select Option</option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
<input type="submit" value="Submit">
</form>
Answered 2023-09-20 21:00:56
DEVSNE.VN