Add placeholder support

[yaphanlong]

Hi, is it possible to include placeholder support as shown below? Current workaround is to use javascript and target each input to inject placeholder.

[AlexMiniApps]

@yaphanlong Hi, I will research it, but it seems that this placeholder will not be native for the HTML.

[rbalet]

@AlexMiniApps @yaphanlong It would be actually possible by

1. Adding the has-value class up in the span (or adding a new class)
2. Displaying the following css in the span, if it doesn't have the class

span {
 &.has-value {
 &:after {
 content: "";
 position: absolute;
 height: 8px;
 width: 8px;
 top: calc(50% - 4px);
 left: calc(50% - 4px);
 background-image: radial-gradient(
 circle at center,
 lightgray 5px,
 transparent 5px
 );
 border-radius: 100%;
 background-size: 20px;
 background-position: top center, bottom center;
 background-repeat: no-repeat;
 }
 }
}

I can make a pull-request if you wish

[AlexMiniApps]

@rbalet Thanks for the suggestion