how to change input text box style to line?

in my 开发者_运维知识库form I have three input fields name, email, mobile but I want to change input text box like -

name :  _____________  
email:  _____________  
mob  :  _____________  

In your CSS:

input[type=text] {
    background: transparent;
    border: none;
    border-bottom: 1px solid #000000;
}

From here you can play with padding to position the actual text entry where you would like it. For instance, to have the line extend 5 pixels either side of the actual entry area:

    padding: 2px 5px;

if you want to this also in ie6 than you can use bg image for this with background-position

.

input{
    background:url(bg-dot.jpg) repeat-x center bottom;
    border:none;
    padding:2px 2px;
}

so for all browser support with ie6 you should use this.

border: 1px solid black;
float: left;
margin: 0;
padding: 0;
border-top: 0px;
border-left: 0px;
border-right: 0px;

You can style an input box however you want. Check the Codepen where I have styled an input box only with css.

Style an INPUT box with only CSS

HTML -

<div class="input__box">
    <input type="text" placeholder="Enter Some Text Here...">
</div>

CSS -

.input__box{
    width:800px;
    height: 200px;
    margin:0 auto;
    background-color: #f2f2f2;
    display: grid;
    place-items:center;
    position: relative;
}

.input__box  input{
    all:unset;
    width:600px;
    height:60px;
    border:1px solid grey;
    padding-left:55px;
    font-size:18px;
    color:#333;
    font-family:sans-serif;
    position:relative;
}

input:focus{
    outline:1px solid royalblue;
    border:none;
}

input[type="text"]::-webkit-input-placeholder { /* Chrome/Opera/Safari */
    font-size:18px;
    color:dimgrey;
    font-family:sans-serif;
}

input[type="text"]::-moz-placeholder{ /* Firefox 19+ */
    font-size:18px;
    color:dimgrey;
    font-family:sans-serif;
}

input[type="text"]:-moz-placeholder{ /* Firefox 18- */
    font-size:18px;
    color:dimgrey;
    font-family:sans-serif;
}

input[type="text"]:-ms-input-placeholder{ /* IE 10+ */
    font-size:18px;
    color:dimgrey;
    font-family:sans-serif;
}

input[type="text"]::placeholder { 
    font-size:18px;
    color:dimgrey;
    font-family:sans-serif;
}

.input__box::before{
    content: "☎";
    position: absolute;
    left: calc(50% - 327px);
    top:calc(50% - 30px);
    color: #333;
    font-weight: bold;
    font-size:40px;
    padding:0 10px;
}

.input__box {
  width: 800px;
  height: 200px;
  margin: 0 auto;
  background-color: #f2f2f2;
  display: grid;
  place-items: center;
  position: relative;
}

.input__box input {
  all: unset;
  width: 600px;
  height: 60px;
  border: 1px solid grey;
  padding-left: 55px;
  font-size: 18px;
  color: #333;
  font-family: sans-serif;
  position: relative;
}

input:focus {
  outline: 1px solid royalblue;
  border: none;
}

input[type="text"]::-webkit-input-placeholder {
  /* Chrome/Opera/Safari */
  font-size: 18px;
  color: dimgrey;
  font-family: sans-serif;
}

input[type="text"]::-moz-placeholder {
  /* Firefox 19+ */
  font-size: 18px;
  color: dimgrey;
  font-family: sans-serif;
}

input[type="text"]:-moz-placeholder {
  /* Firefox 18- */
  font-size: 18px;
  color: dimgrey;
  font-family: sans-serif;
}

input[type="text"]:-ms-input-placeholder {
  /* IE 10+ */
  font-size: 18px;
  color: dimgrey;
  font-family: sans-serif;
}

input[type="text"]::placeholder {
  font-size: 18px;
  color: dimgrey;
  font-family: sans-serif;
}

.input__box::before {
  content: "☎";
  position: absolute;
  left: calc(50% - 327px);
  top: calc(50% - 30px);
  color: #333;
  font-weight: bold;
  font-size: 40px;
  padding: 0 10px;
}

<div class="input__box">
  <input type="text" placeholder="Enter Some Text Here...">
</div>

If using styled components you can do the following if using a white background, which I think there are some equivalent CSS to do same thing:

const TextInput = styled.TextInput`
  width: 295px;
  height: 30px;
  border: 1px solid #dbdfea;

  border-top-color: white;
  border-left-color: white;
  border-right-color: white
 ` 

you want to show only bottom part that's why apply css in such a way that it disables all the other three parts ..

apply CSS like

border: 1px solid black;
float: left;
margin: 0;
padding: 0;
border-top: 0px;
border-left: 0px;
border-right: 0px;

works for all

here is my css

   .mainInput {
     width: 100%;
     border: none;
     border-bottom: 1px solid #474747;
     color: rgba(0, 0, 0, 0.4);
     background: transparent;
     font-size: 16px;
     padding-bottom: 1.25rem;
     outline: none;
   }
   .mainInput::placeholder {
     text-overflow: ellipsis !important;
     color: rgba(0, 0, 0, 0.4);
   }

here it is