Conditional attributes in 1.0

Question

Is it possible to use conditional attributes in Polymer 1.0? I've try to find it in the migration guide and also in Road to polymer without success.

I know that in Polymer 1.0 there's a new conditional template, but I don't want to duplicate my code.

So in 0.5 version we can had something like:

<input readonly?={{my-boolean-expression}} (...)>

And, in 1.0, should we do it with a template?

<template is="dom-if" if="{{my-boolean-expression}}">
      <input readonly (...)>
</template>
<template is="dom-if" if="!{{my-boolean-expression}}">
       <input (...)>
</template>

Answer 1

See the docs here.

What you will want to do is:

<input readonly$="{{my-boolean-expression}}">