Assuming that select fields are either always required or we are able to provide a default value for optional select fields, is an assumption which might not hold true all of the time.Although usually one of my pet peeves is to build functionality which requires (or seems to require) JavaScript, with pure CSS, in this case just some sprinkles of JavaScript could solve this problem once and for all.By setting the initial placeholder grey color of the element with JavaScript, we are save in case the user has disabled JavaScript, JavaScript didn’t load, the Browser couldn’t execute our JavaScript code or any other reason why JavaScript can be not available. The placeholder pseudo-class is going to match input elements which show a placeholder text.
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利用CSS伪类，为select添加伪类required，即不能为空；而默认选项(Placeholder)的value为空，触发invalid，实现不选时置灰的效果； sayoko06的博客 05-15 6461
To change this, style the placeholder with the non-standard ::placeholder selector.
::placeholder { color: blue; font-size: 1.5em; } Seul un sous-ensemble des propriétés CSS peut être utilisé avec un sélecteur respectant ce pseudo-élément : Styling a select form field in a particular way is often impossible. But if you only want to change the font styles of the placeholder text but not the input itself, you’ll need a special pseduo-element.
Select2 supports placeholders for all configurations, including AJAX.
A flexible and beautiful Select Input control for ReactJS with multiselect, autocomplete and ajax support. Now lets see how we can change the color of the placeholder for each different browsers. The placeholder is a text displayed in the input field before user enter the value as a short hint. The :invalid works here because of the empty value in placeholder option. Step 2) Add CSS: In most browsers, the placeholder text is grey. After some research I found out I could use native browser form validation with the The problem with this solution is, that it only works for required form fields. Placeholder Selectors. It will be undetectable but still visible.To make it non-visible after the user clicks to select an option, you must set the When the
The problem at hand is, how to display a placeholder inside a select field.At first I didn’t realise that the HTML select element does not support the placeholder attribute, I just assumed it does.
In HTML there’s this nifty attribute called the placeholder.
When you apply a CSS font styles to the input field, the placeholder text will also inherit that properties. Recently I was confronted with the task of creating a select field with a placeholder value so that the select field blends in nicely with other form fields on the page.
# Syntax The ::placeholder CSS pseudo-element represents the placeholder text in an or