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Loading State with messages Ready

This template shows how to build a simple responsive loading state, which shows messages to the user. Please note that the example below does not represent a real use case. Adjust the style of the messages as required by the design.

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<!DOCTYPE html>
<html lang="fi">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1.0" />
  <title>LähiTapiola</title>
  <link rel="stylesheet" href="https://cdn.duetds.com/api/fonts/3.0.54/lib/localtapiola.css" integrity="sha384-5JYmtSD7nykpUvSmTW1CHMoBDkBZUpUmG0vuh+NUVtZag3F75Kr7+/JU3J7JV6Wq" crossorigin="anonymous" />
  <link rel="stylesheet" href="https://cdn.duetds.com/api/css/4.2.2/lib/duet.min.css" integrity="sha384-I9LwsWxJZISYNi8vTILW3uDtX9EoPPz9shzRoJQ1Qz5zM4eEcyZ0LOb+Fk9/2YNU" crossorigin="anonymous" />
  <link rel="stylesheet" href="https://cdn.duetds.com/api/tokens/4.1.2/lib/tokens.custom-properties.css" integrity="sha384-/rw1rcr74nmctKEYMFnAfZ/7OWf2ygqzO89C8RJyRvAyixuiQ3FMobxxG9u8l91g" crossorigin="anonymous" />
  <script type="module" src="https://cdn.duetds.com/api/components/9.19.1/lib/duet/duet.esm.js" integrity="sha384-0lNqeGTUkq0kaxxD83W+aiywH1mNpztNnY0/WNEcIrbT4jfwqyD5RRStN/XOfAZr" crossorigin="anonymous"></script>
<script nomodule src="https://cdn.duetds.com/api/components/9.19.1/lib/duet/duet.js" integrity="sha384-oxostYE9IRZqkfMdin5Jumsr8xxZZVN/ZLwmnNjerd5oG+Jr7fil86yzQ2B85UM4" crossorigin="anonymous"></script>
</head>
<body>
<duet-layout center middle>
  <div slot="main">
    <duet-heading level="h1">Page with content that is fetched from a slow service</duet-heading>
    <duet-paragrap>To start loading the content, click the start button.</duet-paragrap>
    <duet-divider></duet-divider>
    <duet-spacer></duet-spacer>
    <duet-button variation="primary" id="start-button">Start</duet-button>
    <duet-spacer size="xx-large"></duet-spacer>
    <div id="dynamic-content" aria-live="polite"></div>
  </div>
</duet-layout>

<template id="loader-panel-template">
  <duet-panel variation="secondary" class="duet-text-center">
    <duet-paragraph weigh="semibold">
      <span>Loading content, please wait.</span>
    </duet-paragraph>
    <div>
      <duet-spinner size="large" color="primary"></duet-spinner>
    </div>
  </duet-panel>
</template>

<template id="dynamic-data-template">
  <div class="dynamic-data">
    <duet-heading level="h2">Some dynamic data</duet-heading>
    <duet-list variation="striped">
      <duet-list-item>
        <span slot="label">Foo</span>
        <span slot="value">€ 1500</span>
      </duet-list-item>
      <duet-list-item>
        <span slot="label">Bar</span>
        <span slot="value">50.8 %</span>
      </duet-list-item>
      <duet-list-item>
        <span slot="label">Baz</span>
        <span slot="value">Lorem ipsum</span>
      </duet-list-item>
    </duet-list>
  </div>
</template>


<style>
  div:has(duet-spinner) {
    position: relative;
    height: 8rem;
  }
</style>

<script>

  const contentHolder = document.getElementById("dynamic-content")
  const loaderTemplate = document.getElementById("loader-panel-template")
  const dataTemplate = document.getElementById("dynamic-data-template")

  document.getElementById("start-button").addEventListener("click", () => {
    const dataWeAreLoding = document.importNode(dataTemplate.content, true)
    const loaderPanel = document.importNode(loaderTemplate.content, true)
    // we use span inside the duet-paragraph for changing text to ensure screen readers access it correctly
    const textContainer = loaderPanel.querySelector("duet-paragraph span")

    // For demo purposes, clear content if it is there
    contentHolder.querySelector(".dynamic-data")?.remove()

    // First show the loder, start adding messages only after that
    contentHolder.appendChild(loaderPanel)

    setTimeout(() => {
      textContainer.textContent = "Taking a bit longer than expected, please be patient."
    }, 5000)

    setTimeout(() => {
      textContainer.textContent = "Process is still going on, please wait."
    }, 10000)

    setTimeout(() => {
      textContainer.textContent = "Five more seconds and we are ready."
    }, 15000)

    setTimeout(() => {
      contentHolder.querySelector("duet-panel").remove()
      contentHolder.appendChild(dataWeAreLoding)
    }, 20000)
  })

</script>
</body>
</html>

Integration

To install this template’s dependencies into your project, run:

npm install @duetds/components
npm install @duetds/css
npm install @duetds/fonts

For further guidelines, please see each package’s documentation.


Tutorials

Follow these practical tutorials to learn how to build simple page layouts using Duet’s CSS Framework, Web Components and other features:

Tutorials

Building Layouts

 Tutorials

Using CLI Tools

 Tutorials

Creating Custom Patterns

 Tutorials

Server Side Rendering

 Tutorials

Sharing Prototypes

 Tutorials

Usage With Markdown

Troubleshooting

If you experience any issues while using a template, please head over to the Support page for more guidelines and help.