更改CSS樣式HTML5表單所需的屬性所需的消息

Question

我為RTL項目使用RTLbootstrap 。 現在我有任何帶有HTML5表單required屬性required消息的表單 。 在行動中，我有這個氣球供輸入：

我需要像這樣更改RTL：

HTML：

<div class="controls">
  <input class="span4" type="text" name="title" placeholder="Title"  value=""  required oninvalid="this.setCustomValidity(\'User ID is a must\')">
</div>

注意：這不是自定義工具提示或氣球！ 如果我們在表單輸入中添加所需的html標簽。 在提交表單之前， HTML5 form required attribute會自動顯示此氣球消息。 我需要編輯/更改/設置CSS以獲得驗證消息嗎？

如何更改顯示在input字段right的必填字段消息的顯示？

Answer 1

Chrome不再允許樣式驗證表單氣泡：

查看具體信息

Firefox無法設置錯誤氣泡的樣式

查看具體信息

Answer 2

嘿，我在這里找到一個鏈接，他們使用了這個技巧。他們在輸入類型后附加了一個類。 並在其中顯示消息。希望在少量自定義后有所幫助。 有效的Codepen： http ：//codepen.io/smarty_tech/pen/ONZRVp

<form id="frm" action="action">
<div>
<label>Email</label>
  <input type="email" required="required"/><span class="theTooltip">Invalid email</span>
 </div>
 <div>
  <button formnovalidate="formnovalidate">OK</button>
</div>

 document.querySelector('#frm').addEventListener('submit', e => {
   e.preventDefault();
   e.currentTarget.classList.add('submitted');
 });

  body
  font-family: Helvetica, sans-serif
 display: flex
 flex-direction: column
align-items: center
 justify-content: center
overflow: hidden
width: 100%
 height: 100vh
  background orange

 form > div
  position: relative
  margin-bottom: 10px

 .theTooltip
  $bgcolor = rgba(black, 0.7)
  $arrow = 10
  $radius = 5
  $maxWidth = 250
  $padding = 15
  backface-visibility: hidden
  will-change: opacity, visibility
  max-width: $maxWidth * 1px
  border-radius: $radius * 1px
  background-color: $bgcolor
  padding: $padding * 1px
  color: white
  box-sizing: border-box
  display: inline-block
  position: absolute
  transform-style: preserve-3d
  transform: translate(15%, -50%)
  top: 50%;
  left: auto
  right: auto
  bottom: auto
  visibility: hidden
  margin: 0
  opacity: 0
  transition: opacity 0.3s ease-out
  z-index: 100
  &:after
  content: ''
  position: absolute
  width: 0
   height: 0
  top: 50%
margin-top: $arrow * -1px
left: $arrow * -1px
border-top: $arrow * 1px solid transparent
border-bottom: $arrow * 1px solid transparent
border-right: $arrow * 1px solid $bgcolor

  label
 display: inline-block
 vertical-align: center

input
background: white
border: 1px solid transparent
cursor: pointer
display: inline-block
overflow: visible
margin: 0
outline: 0
vertical-align: center
text-decoration: none
width: auto
border-radius: 3px
cursor: text
padding: 7px
&:focus
&:active
outline: none

 .submitted
  input
  &:invalid
    border: 1px solid red
    ~ .theTooltip
       visibility: visible
      opacity: 1
  &:valid
    ~ .theTooltip
      transition: opacity 0.3s, visibility 0s 0.3s

Answer 3

僅css3的消息示例

代碼：

.tooltip, .arrow:after {
  background: black;
  border: 2px solid white;
}

.tooltip {
  pointer-events: none;
  opacity: 0;
  display: inline-block;
  position: absolute;
  padding: 10px 20px;
  color: white;
  border-radius: 20px;
  margin-top: 20px;
  text-align: center;
  font: bold 14px "Helvetica Neue", Sans-Serif;
  font-stretch: condensed;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow: 0 0 7px black;
}
.arrow {
  width: 70px;
  height: 16px;
  overflow: hidden;
  position: absolute;
  left: 50%;
  margin-left: -35px;
  bottom: -16px;
}
.arrow:after {
   content: "";
   position: absolute;
   left: 20px;
   top: -20px;
   width: 25px;
   height: 25px;
   -webkit-box-shadow: 6px 5px 9px -9px black,5px 6px 9px -9px black;
   -moz-box-shadow: 6px 5px 9px -9px black,5px 6px 9px -9px black;
   box-shadow: 6px 5px 9px -9px black,5px 6px 9px -9px black;
  -webkit-transform: rotate(45deg);
  -moz-transform:    rotate(45deg);
  -ms-transform:     rotate(45deg);
  -o-transform:      rotate(45deg); 
}
.tooltip.active {
  opacity: 1;
  margin-top: 5px;
  -webkit-transition: all 0.2s ease;
  -moz-transition:    all 0.2s ease;
  -ms-transition:     all 0.2s ease;
  -o-transition:      all 0.2s ease;
}
.tooltip.out {
  opacity: 0;
  margin-top: -20px;
}