2 colors in one placeholder of input field

Here is a cross-browser solution that does not use Javascript:

Live demo

Inline elements such input do not support :before and :after. To make things even harder the placeholder selector and their pseudo-classes are not fully supported by all browsers, as you found out.

So, the workaround is to add a label placed relatively on top of the input box with a for attribute pointing to the input text box. This way, when user clicks the label (fake placeholder) the focus goes into the input box underneath.

Replace your class="required" by the attribute required="required". This gives you an opportunity to use the :invalid and :valid selectors, and also lets the browser display a validation error, when the form is submitted with empty required fields.

input {
  width: 160px;

input[type=submit] {
  width: auto;

input[required]+label {
  color: #999;
  font-family: Arial;
  font-size: .8em;
  position: relative;
  left: -166px;
  /* the negative of the input width */

input[required]+label:after {
  content: '*';
  color: red;

/* show the placeholder when input has no content (no content = invalid) */

input[required]:invalid+label {
  display: inline-block;

/* hide the placeholder when input has some text typed in */

input[required]:valid+label {
  display: none;
  <input type="text" id="name" name="name" required="required" />
  <label for="name">Name</label>
  <input type="email" id="email" name="email" placeholder="Email" />
  <input type="submit" />

Since the email is not required, leave the native placeholder there, and just to this hack for the name.

I also changed your email from type="text" to type="email" for better user experience on mobile devices.

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