Moved to
stackoverflow:
http://stackoverflow.com/questions/22855083/accessing-an-attribute-on-a-child-thats-set-with-a-data-binding
On Thursday, April 3, 2014 11:21:29 PM UTC-7, Rob Dodson wrote:
>
> I have a little bit of markup that looks like this:
>
> <polymer-element name="blog-post" noscript>
> <template>
>
> <mark-down>
> <textarea value="{{post}}"></textarea>
> </mark-down>
>
> <polymer-localstorage name="my-blog-editor" value="{{post}}">
> </polymer-localstorage>
> </template>
> </polymer-element>
>
> I'd like the mark-down tag to be able to see the value of the textarea but
> I'm having a hard time knowing when to query for it.
>
> Inside of mark-down my code looks something like this:
>
> attached: function() {
> this.textarea = this.$.textareaContent.getDistributedNodes()[0];
> // this grabs the textarea element
>
> // create an observer instance
> var observer = new MutationObserver(function(mutations) {
> mutations.forEach(function(mutation) {
> console.log(mutation);
> });
> });
>
> // pass in the target node, as well as the observer options
> observer.observe(this.textarea, { attributes: true });
> }
>
> Unfortunately the mutation observer never fires. I've tried checking for
> the value of textarea directly in attached and domReady but it's always
> null. The only success I've had is to use a setTimeout to check for the
> value asynchronously.
>
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