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Messagebar Svelte Component

Messagebar Svelte component represents Framework7's Messagebar component.

Messagebar Components

There are following components included:

Messagebar Properties

PropTypeDefaultDescription
<Messagebar> properties
initbooleantrueInitializes Messagebar
namestringTextarea "name" attribute
textareaIdstring
number		Textarea "id" attribute
placeholderstringMessageTextarea placeholder text
valuestring
number		Textarea value
readonlybooleanfalseSets "readonly" textarea attribute
disabledbooleanfalseSets "disabled" textarea attribute
sendLinkstringEnables Send link and specifies its text. This property will be ignored in case you use send-link slot
maxHeightnumberDefines resizable textarea max height
resizablebooleantrueEnables resizable textarea
sheetVisiblebooleanfalseMakes messagebar sheet visible/active
attachmentsVisiblebooleanfalseMakes messagebar attachments visible/active
resizePagebooleantrueWhen enabled, it will resize messages page when messagebar textarea size changed
<MessagebarSheetImage> properties
imagestringSheet image URL
checkedbooleanfalseIndicates whether this sheet image-item is checked or not
<MessagebarAttachment> properties
imagestringAttachment image URL
deletablebooleantrueDefines whether the attachment is deletable or not. In case of deletable the additional delete button will be rendered

Messagebar Events

EventArgumentsDescription
<Messagebar> events
change(event)Event will be triggered when "change" event occurs on messagebar textarea element
input(event)Event will be triggered when "input" event occurs on messagebar textarea element
focus(event)Event will be triggered when "focus" event occurs on messagebar textarea element
blur(event)Event will be triggered when "blur" event occurs on messagebar textarea element
submit
send		(value, clear)Event will be triggered when user clicks on messagebar "send link"
<MessagebarSheetImage> events
change(event)Event will be triggered on sheet item checkbox change
<MessagebarAttachment> events
attachmentClick(event)Event will be triggered on attachment click
attachmentDelete(event)Event will be triggered on attachment delete button click

Messagebar Slots

Messagebar Svelte component has additional slots for custom elements:

<Messagebar placeholder="Message">
  <div slot="before-inner">Before inner</div>
  <div slot="after-inner">After inner</div>
  <div slot="before-area">Before textarea</div>
  <div slot="after-area">After textarea</div>
  <i class="f7-icons" slot="send-link">arrow_up_fill</i>
  <div>Default slot</div>
</Messagebar>

Renders to:

<div class="toolbar messagebar">
  <div>Before inner</div>
  <div class="toolbar-inner">
    <div class="messagebar-area">
      <div>Before textarea</div>
      <textarea placeholder="Message"></textarea>
      <div>After textarea</div>
    </div>
    <a href="#" class="link">
      <i class="f7-icons" slot="send-link">arrow_up_fill</i>
    </a>
    <div>Default slot</div>
  </div>
  <div>After inner</div>
</div>

Access To Messagebar Instance

If you use automatic initalization to init Messagebar (with init={true} prop) and need to use its Methods and Properties you can access its initialized instance by calling .instance() component's method. For example:

<Messagebar bind:this={component}>...</Messagebar>

<script>
  let component;

  // to get instance in some method
  component.instance()
</script>

Examples

Here is how the full example of Messages page where it can be used together with Messages:

messages.svelte
<script>
  import { onMount } from 'svelte';
  import {
    f7,
    f7ready,
    Navbar,
    Page,
    Messages,
    MessagesTitle,
    Message,
    Messagebar,
    Icon,
    MessagebarAttachments,
    MessagebarAttachment,
    MessagebarSheet,
    MessagebarSheetImage,
  } from 'framework7-svelte';

  let messagebarInstance;

  let attachments = [];
  let sheetVisible = false;
  let typingMessage = null;
  let messageText = '';
  let messagesData = [
    {
      type: 'sent',
      text: 'Hi, Kate',
    },
    {
      type: 'sent',
      text: 'How are you?',
    },
    {
      name: 'Kate',
      type: 'received',
      text: 'Hi, I am good!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Blue Ninja',
      type: 'received',
      text: 'Hi there, I am also fine, thanks! And how are you?',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
    {
      type: 'sent',
      text: 'Hey, Blue Ninja! Glad to see you ;)',
    },
    {
      type: 'sent',
      text: 'Hey, look, cutest kitten ever!',
    },
    {
      type: 'sent',
      image: 'https://cdn.framework7.io/placeholder/cats-200x260-4.jpg',
    },
    {
      name: 'Kate',
      type: 'received',
      text: 'Nice!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Kate',
      type: 'received',
      text: 'Like it very much!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Blue Ninja',
      type: 'received',
      text: 'Awesome!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
  ];
  const images = [
    'https://cdn.framework7.io/placeholder/cats-300x300-1.jpg',
    'https://cdn.framework7.io/placeholder/cats-200x300-2.jpg',
    'https://cdn.framework7.io/placeholder/cats-400x300-3.jpg',
    'https://cdn.framework7.io/placeholder/cats-300x150-4.jpg',
    'https://cdn.framework7.io/placeholder/cats-150x300-5.jpg',
    'https://cdn.framework7.io/placeholder/cats-300x300-6.jpg',
    'https://cdn.framework7.io/placeholder/cats-300x300-7.jpg',
    'https://cdn.framework7.io/placeholder/cats-200x300-8.jpg',
    'https://cdn.framework7.io/placeholder/cats-400x300-9.jpg',
    'https://cdn.framework7.io/placeholder/cats-300x150-10.jpg',
  ];
  const people = [
    {
      name: 'Kate Johnson',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Blue Ninja',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
  ];
  const answers = [
    'Yes!',
    'No',
    'Hm...',
    'I am not sure',
    'And what about you?',
    'May be ;)',
    'Lorem ipsum dolor sit amet, consectetur',
    'What?',
    'Are you sure?',
    'Of course',
    'Need to think about it',
    'Amazing!!!',
  ];
  let responseInProgress = false;

  $: attachmentsVisible = attachments.length > 0;
  $: placeholder = attachments.length > 0 ? 'Add comment or Send' : 'Message';

  onMount(() => {
    f7ready(() => {
      messagebarInstance = f7.messagebar.get('.messagebar');
    });
  });

  function isFirstMessage(message, index) {
    const previousMessage = messagesData[index - 1];
    if (message.isTitle) return false;
    if (
      !previousMessage ||
      previousMessage.type !== message.type ||
      previousMessage.name !== message.name
    )
      return true;
    return false;
  }
  function isLastMessage(message, index) {
    const nextMessage = messagesData[index + 1];
    if (message.isTitle) return false;
    if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name)
      return true;
    return false;
  }
  function isTailMessage(message, index) {
    const nextMessage = messagesData[index + 1];
    if (message.isTitle) return false;
    if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name)
      return true;
    return false;
  }
  function deleteAttachment(image) {
    const index = attachments.indexOf(image);
    attachments.splice(index, 1);
    attachments = attachments;
  }
  function handleAttachment(e) {
    const index = f7.$(e.target).parents('label.checkbox').index();
    const image = images[index];
    if (e.target.checked) {
      // Add to attachments
      attachments.unshift(image);
    } else {
      // Remove from attachments
      attachments.splice(attachments.indexOf(image), 1);
    }
    attachments = attachments;
  }
  function sendMessage() {
    const text = messageText.replace(/\n/g, '<br>').trim();
    const messagesToSend = [];
    attachments.forEach((attachment) => {
      messagesToSend.push({
        type: 'sent',
        image: attachment,
      });
    });
    if (text.length) {
      messagesToSend.push({
        text,
        type: 'sent',
      });
    }
    if (messagesToSend.length === 0) {
      return;
    }

    // Reset attachments
    attachments = [];
    // Hide sheet
    sheetVisible = false;
    // Send message
    messagesData = [...messagesData, ...messagesToSend];
    // Clear
    messageText = '';
    messagebarInstance.clear();

    // Focus area
    if (text.length) messagebarInstance.focus();

    // Mock response
    if (responseInProgress) return;
    responseInProgress = true;

    setTimeout(() => {
      const answer = answers[Math.floor(Math.random() * answers.length)];
      const person = people[Math.floor(Math.random() * people.length)];
      typingMessage = {
        name: person.name,
        avatar: person.avatar,
      };
      setTimeout(() => {
        messagesData = [
          ...messagesData,
          {
            text: answer,
            type: 'received',
            name: person.name,
            avatar: person.avatar,
          },
        ];
        typingMessage = null;
        responseInProgress = false;
      }, 4000);
    }, 1000);
  }
</script>

<!-- svelte-ignore a11y-missing-attribute -->
<Page>
  <Navbar title="Messages" />

  <Messagebar
    {placeholder}
    {attachmentsVisible}
    {sheetVisible}
    value={messageText}
    onInput={(e) => (messageText = e.target.value)}
  >
    <a class="link icon-only" slot="inner-start" on:click={() => (sheetVisible = !sheetVisible)}>
      <Icon ios="f7:camera_fill" md="material:camera_alt" />
    </a>
    <a class="link icon-only" slot="inner-end" on:click={sendMessage}>
      <Icon ios="f7:arrow_up_circle_fill" md="material:send" />
    </a>
    <MessagebarAttachments>
      {#each attachments as image, index (index)}
        <MessagebarAttachment
          key={index}
          {image}
          onAttachmentDelete={() => deleteAttachment(image)}
        />
      {/each}
    </MessagebarAttachments>
    <MessagebarSheet>
      {#each images as image, index (index)}
        <MessagebarSheetImage
          key={index}
          {image}
          checked={attachments.indexOf(image) >= 0}
          onChange={handleAttachment}
        />
      {/each}
    </MessagebarSheet>
  </Messagebar>

  <Messages>
    <MessagesTitle><b>Sunday, Feb 9,</b> 12:58</MessagesTitle>
    {#each messagesData as message, index (index)}
      <Message
        type={message.type}
        image={message.image}
        name={message.name}
        avatar={message.avatar}
        first={isFirstMessage(message, index)}
        last={isLastMessage(message, index)}
        tail={isTailMessage(message, index)}
        htmlText={message.text}
      />
    {/each}
    {#if typingMessage}
      <Message
        type="received"
        typing={true}
        first={true}
        last={true}
        tail={true}
        header={`${typingMessage.name} is typing`}
        avatar={typingMessage.avatar}
      />
    {/if}
  </Messages>
</Page>
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