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Material-input

An easy drop-in material design vanilla custom input element. HTML form ready, no framework dependencies, small footprint.

Demo

Installation

npm install --save material-input

You need the webcomponents-lite polyfill.

Load the polyfill and the material-input.js in your html page or however you load you javascript dependencies:

<script src="webcomponents-lite.js"></script>
<script src="./node_modules/material-input/dist/material-input.js"></script>

Usage

Just drop the <material-input> element into you html <form> element and you are ready to go. A visually hidden <input> field will be created which syncs its values with the <material-input> to allow for normal forms to pick up the value.

<material-input name="username"></material-input>

Labels

By default material inputs use floating labels that can be defined via the label attribute. This means that the label looks like a placeholder, but when the field is focuses or filled it is moved above the users text.

<material-input name="username" label="Choose your username"></material-input>

Placeholders

You can use normal input placeholders instead of, or in combination with labels. The label will always be above the input field, if you choose to use both.

<material-input name="username" label="username" placeholder="Choose your username"></material-input>

Value

Like a normal input field, you can set the value using the attribute value in html or via javascript by either setting the attribute or by directly setting the value property.

<!-- html -->
<material-input name="animal" value="cat"></material-input>

// javascript
document.querySelector('material-input.animal').value = 'cat';
 
document.querySelector('material-input.animal').setAttribute('value','cat');

Validation

Validation works just like with any default <input> element. Add a required or set the type to email and you will get the browsers validation notifications. Additionally the material-input will have a valid or invalid style.

Additionally it is possible to explicitly set a field to be invalid by using the default setCustomValidity method on the material-input. You can read more about the setCustomValidity feature on MDN.

document.querySelector('material-input.customValidatedItem').setCustomValidity('This is not valid.');

Backend validation

If you validate your forms via your backend (which you should!), you cann add an invalid or valid attribute to the material-input. This will set the field in the defined state.

Error messages

You can set the message attribute, which will add an error message below the field. This is always an error message, no matter what state the field is in.

Autovalidate

When adding the autovalidate attribute to the material-input, the field will be validated on every keydown event. However, this means a field with no validation rules will always be valid and receive the valid immediately.

Custom styling

Apart from basic styling on the material-input like margins or the font-size you can use the following css properties to for custom styling.

/* select your specific input or all */
material-input.some-class{
    /* the text color of the input */
    --material-input-text-color: black;
    /* the text color of the placeholder or the floating label on an empty field */
    --material-input-placeholder-color: grey;
    /* the color of the border and label when the field is focused */
    --material-input-highlight-color: indigo;
    /* the color of the border and label when the field is in an invalid state */
    --material-input-invalid-color: red;
    /* the color of the border and label when the field is in a valid state */
    --material-input-valid-color: green;
    /* the default color of the bottom border */
    --material-input-border-color: orange;
    /* the height of the bottom border when the field is not focused */
    --material-input-line-height: 1px;
    /* the height of the bottom border when the field is focused */
    --material-input-highlight-line-height: 3px;
}