# Add another element as property

# Why?

Sometimes we will need to have other element as children, and have more control on it than a dropzone.

For example, to add an icon inside a button or to display a text where you forced the text value, but want to allow users to change its style.

This is also a common pattern to initialize a dropzone content.

# Add an element on creation

See the Development process to load a base section in dev mod.

We will replace the title by a ww-text component.

# ww-config.js

The first step is to declare this property on the properties field of the configuration:

properties: {
    // [...]
    title: {
      hidden: true,
      defaultValue: { isWwObject: true, type: 'ww-text' },
    },
}

TIP

We use the special isWwObject property inside defaultValue.

We also hide the property from the panel as there is no good way to edit from the sidepanel.

# Use the value inside the template

<div class="my-section">
    <wwElement v-bind="content.title" />
    <p>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et
        dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex
        ea commodo consequat.
    </p>
</div>

TIP

Here we use the special object wwElement. See here to learn about all the options available.

And it's done!

# Add a forced props

Some elements can take special props when they are used inside another one.

This is the case for ww-text: you can force the text content. In that case, users will no longer be able to edit the text content but can still customize the style of the element.

This is very useful when your text is computed by internal logic. This is what we use for the Paginator element for example.

// inside ww-config.js
properties: {
    // [...]
    priceElement: {
      hidden: true,
      defaultValue: { isWwObject: true, type: 'ww-text' },
    },
}

<div class="my-section">
    <wwElement v-bind="content.priceElement" :ww-props="{ text: computedPrice }"></wwElement>
</div>

# Add an element dynamically

Sometimes, you will need to create an element after your component has been mounted, in response to a property change for example.

Be aware that element creation is only available in the Editor context, so your code needs to be stripped from the production build. (See stripping here)

Example: you have a toggle to indicate if an icon is present or not. You create the icon element only when this option is active.

You can use wwLib.createElement for that or wwLib.createElementFromTemplate, and the update:content event:

export default {
    // [...]
    methods: {
        createIcon() {
            const icon = wwLib.createElement({ type: "ww-icon" })
            this.$emit('update', { icon })
        }
    }
    // [...]
}

WARNING

Elements created this way but not saved anywhere inside an element or a component content will be garbage collected at some point, and will not appear in the published web-app. If you use this method, please store the object in a content after.

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