[5.x] Attribute Modifier

[potsky]

This PR adds a new modifier attribute to render an HTML attribute for example when the given $value is not empty (related to this discussion #9323)

The main goal is to avoid this:

<a href="https://statamic.awesome"
    {{ if class }}class="{{ class }}"{{ /if }}
    {{ if target }}target="{{ target }}"{{ /if }}
>Go to Statamic</a>

and to use this instead:

<a href="https://statamic.awesome"
    {{ class | attribute:class }}
    {{ target | attribute:target }}
>Go to Statamic</a>

It supports:

• boolean (only returns the attribute if true, think about the requiredattribute in an input)
• objects (only if they implement the __toString() method)
• array (render json content if array is not empty)
• int
• float
• string

[marcorieser]

Does this work for attributes without a value e.g. download or required?

[edalzell]

Love this

[potsky]

Does this work for attributes without a value e.g. download or required?

Do you mean this?

<input type=... {{ mandatory | attribute:required }}>

should returns

<input type=... required>

if mandatory is true and

<input type=...>

if mandatory is false?

For the moment, if mandatory is true, it returns

<input type=... required="1">

I will update this right now, this is a very good idea, thank you!

[marcorieser]

Do you mean this?

exactly.

[potsky]

✅ Done.
It supports boolean, objects, int, float, stringable objects too
Array and non stringable objects will return nothing.

[marcorieser]

Array could be converted to json. Just an idea. Thinking about x-data or some other data- attribute.

[potsky]

Array could be converted to json. Just an idea. Thinking about x-data or some other data- attribute.

Make sense. Done ✅

[jasonvarga]

Thanks! I made just a few tweaks:

• Support for collections
• When an object doesn't have a __toString, let the exception be thrown.
• Simplify tests