css - How to get Flexbox to allow an input to be 100% width? -


i have following flexbox form powered bootstrap 4.

https://jsfiddle.net/kkt0k2bs/1/

i have media query resize form elements smaller display.

on larger displays, want form items inline, on smaller screens, want form elements stacked , @ 100%.

the input not going 100% width on smaller displays... how can enable code width 100% on smaller displays?

html:

<div class="form-mod">         <form class="form-inline justify-content-center d-inline-flex">             <div class="form-group">                 <div>                     <input type="text" name="email" value="" placeholder="enter email..." class="form-control">                 </div>             </div>             <div class="form-group">                 <button type="submit" class="btn btn-primary">request invite</button>             </div>         </form> </div>

css:

.form-mod {   display: inline-block;   text-align: center;   padding: 16px 32px;   background: rgba(0, 0, 0, 0.2);   border-radius: 3;   box-shadow: 0 20px 63px 0 rgba(0,0,0,.6);    [type="text"] {     width: 260px;     margin-right: 16px;     border-radius: 100px;     padding-left: 18px;     border-radius: $border-radius;     font-size: 16px;   }    @include media-breakpoint-down(sm) {     .form-group {       width: 100%;     }     [type="text"] {       width: 100%;       margin: 0 0 16px 0;       display: block;     }     opacity: .5;   } }

add code:

.form-group {   flex: 1 0 auto; }

revised demo

this tells flex items share space when on same line.

but when break onto separate lines, each consume available space.


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