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Form: Styling


Can be provided via the label attribute, but the slot can be used to change the html and CSS of the label. For example add an u-sr-only class to the label to make it (partially) visually hidden. A label is always needed for accessibility reasons.

export const label = () => html`
    .u-sr-only {
      position: absolute;
      top: 0;
      width: 1px;
      height: 1px;
      overflow: hidden;
      clip-path: inset(100%);
      clip: rect(1px, 1px, 1px, 1px);
      white-space: nowrap;
      border: 0;
      margin: 0;
      padding: 0;
    <label slot="label"
      >Label <span class="u-sr-only">partially only visible for screen-readers</span></label


The prefix is used for addons to the input like a minus button in the input-stepper.

export const prefix = () => html`
  <lion-input label="Prefix">
    <div slot="prefix">[prefix]</div>


The suffix can be used for addons to the input like a calculator, datepicker or addressbook. In these cases a button with an icon is used.

export const suffix = () => html`
  <lion-input label="Suffix">
    <div slot="suffix">[suffix]</div>


Before slot does not have an active use case yet.

export const before = () => html`
  <lion-input label="Before">
    <div slot="before">[before]</div>


export const after = () => html`
  <lion-input label="Amount">
    <div slot="after">EUR</div>
  <lion-input label="Percentage">
    <div slot="after">%</div>


Due to our custom inputs being Web Components, it is possible to put HTML content inside an input. For example if you want to add a button as a prefix or suffix.

export const ButtonsWithFields = () => html`
  <lion-input label="Prefix and suffix">
    <lion-button slot="prefix">prefix</lion-button>
    <lion-button slot="suffix">suffix</lion-button>