How to query shadowRoot Content Elements. I create a custom form element, this form have children provided outside the shadowRoot, FormInput, also custom elements. I need to get all children from the shadowRoot. If I use shadowRoot.query or shadowRoot.queryAll, has the same effect from outside the component, I can't view the children, is obfuscated by shadowRoot. I'm trying to use shadowRoot.query("content").getDistributedNodes(); but what hell is this text element in the node list, my children is only one.
@CustomTag("v-form")
class Form extends VaderComponent {
bool isValid(){
bool valid = true;
var nodes = shadowRoot.query("content").getDistributedNodes();
nodes.forEach((element) {
window.console.debug(element);
element.queryAll("v-input").forEach((elementTarget){
if(elementTarget is FormItem){
window.console.info("É um item de formulário");
if(elementTarget.xtag.isValid() == false){
valid = false;
}
}
});
});
return valid;
}
}
<polymer-element name="v-form">
<template>
<form>
<content></content>
</form>
</template>
<script type="application/dart" src="Form.dart"></script>
</polymer-element>
<v-form id="form">
<fieldset>
<legend>Fieldset</legend>
<div class="row">
<div class="large12 columns">
<v-input title="Password Example" type="password" placeholder="large-12.columns" />
</div>
</div>
<div class="row">
<div class="large-12 columns">
<v-input title="Mask Input" mask="999" type="tel" value="Valor" placeholder="large-12.columns"></v-input>
</div>
</div>
<div class="row">
<div clas="large-4 columns">
<v-input title="Input Label" type="date" placeholder="large-4.columns"></v-input>
</div>
<div class="large-4 columns">
<v-input title="Input Label" type="text" allowEpty="false" placeholder="Not Allow Empty Value"></v-input>
</div>
<div class="large-4 columns">
<div class="row collapse">
<div class="small-9 columns">
<v-input title="Input Label" type="text" placeholder="small-9.columns"></v-input>
</div>
<div class="small-3 columns">
<span class="postfix">.com</span>
</div>
</div>
</div>
</div>
<div class="row">
<div class="large-12 columns">
<label>Textarea Label</label>
<textarea placeholder="small-12.columns"></textarea>
</div>
</div>
</fieldset>
</v-form>
The error on call isValid:
#text
undefined:1
Uncaught Error: Class 'Text' has no instance method 'queryAll'.
NoSuchMethodError : method not found: 'queryAll'
Receiver: Instance of 'Text'
Arguments: ["v-input"]
If I just output the item in console.debug I get the follow:
#text
<fieldset>…</fieldset>
#text
Is there a better method? this code is ugly (two forEach (n^2))
shadowRoot and the are different. Can be queried as normal because is part of lightdom. The principal code become:
var nodes = this.queryAll("v-input");
nodes.forEach((element){
if(elementTarget is FormItem){
window.console.info("É um item de formulário");
if(elementTarget.xtag.isValid() == false){
valid = false;
}
}
});
return valid;
This code works as expected