Material Design Lite selectfield component (https://github.com/google/material-design-lite)
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To use any MDL component, you must include the minified CSS and JavaScript files using standard relative-path references in the <head> section of the page, as described in the MDL Introduction.
1. Code a <div> element to hold the text field.
<div>
...
</div> 2. Inside the div, code an <select> element, add the options and add an id attribute of your choice.
<div>
<select id="gender">
<option value=""></option>
<option value="male">Male</option>
<option value="female">Female</option>
</select>
</div> 3. Also inside the div, after the select field, code a <label> element with a for attribute whose value matches the select element's id value, and a short string to be used as the field's placeholder text.
<div>
<select id="gender">
<option value=""></option>
<option value="option1">option 1</option>
<option value="option2">option 2</option>
</select>
<label for="gender">User gender</label>
</div> 4. Add one or more MDL classes, separated by spaces, to the div container, select field, select label, and error message using the class attribute.
<div class="mdl-selectfield mdl-js-selectfield">
<select id="gender" class="mdl-selectfield__select">
<option value=""></option>
<option value="option1">option 1</option>
<option value="option2">option 2</option>
</select>
<label class="mdl-selectfield__label" for="gender">User gender</label>
<span class="mdl-selectfield__error">Select a value</span>
</div>The select field component is ready for use.
Select field with a standard label.
<div class="mdl-selectfield mdl-js-selectfield">
<select id="gender" class="mdl-selectfield__select">
<option value=""></option>
<option value="option1">option 1</option>
<option value="option2">option 2</option>
</select>
<label class="mdl-selectfield__label" for="gender">User gender</label>
<span class="mdl-selectfield__error">Select a value</span>
</div>Select field with a floating label.
<div class="mdl-selectfield mdl-js-selectfield mdl-selectfield--floating-label">
<select id="gender" class="mdl-selectfield__select">
<option value=""></option>
<option value="option1">option 1</option>
<option value="option2">option 2</option>
</select>
<label class="mdl-selectfield__label" for="gender">User gender</label>
<span class="mdl-selectfield__error">Select a value</span>
</div>Select field with a standard label, and error message.
<div class="mdl-selectfield mdl-js-selectfield mdl-selectfield--floating-label">
<select id="gender" class="mdl-selectfield__select">
<option value=""></option>
<option value="option1">option 1</option>
<option value="option2">option 2</option>
</select>
<label class="mdl-selectfield__label" for="gender">User gender</label>
<span class="mdl-textfield__error">Digits only</span>
</div>