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There is a way to remove an attribute completely:

<xpath expr="//field[@name='order_line']/tree" position="attributes">
    <attribute name="editable"/>
</xpath>

And there is a way to completely replace an attribute with smth else:

<xpath expr="//label[@for='type']" position="attributes">
    <attribute name="groups">sale.group_delivery_invoice_address</attribute>
    <attribute name="invisible">False</attribute>
</xpath>

But is there a short way to append a value to an attribute?

So that after appending my_second_class to attribute class in <div class="my_first_class"> we receive <div class="my_first_class my_second_class">.

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Mejor respuesta

I think there is no way to do such thing for attributes.
Your only choice is to retype the previous value of the attribute!

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Autor

Looks like nobody knows of a better solution, indeed. Let's mark yours as a good one then.

Mejor respuesta

Yes, there is. If you have an element like


    <div id="my_div" class="my_first_class">


You can add something to the class-attribute using the following xpath:


    <xpath expr="//div[@id='my_div']" position="attributes">
    <attribute name="class" separator=" " add="my_second_class"/>
    </xpath>

The resulting div would look like:

    <div id="my_div" class="my_first_class my_second_class">

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this is a new thingI guess, which odoo version?

I didn't check older versions than V13, but I can say that it works at least in V13, V14, V15, V16 and V17.

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