I've been trying to set an empty attribute to a polymer element inside another one.
This is the code for my custom element. What I'm trying to do is set "required" to the input element whenever custom-core-input's attribute required is true.
<polymer-element name="custom-core-input" attributes="columnId inputError validation required">
<template>
<section>
<paper-input-decorator id="decorator" error="{{inputError}}">
<input id="custominput" is="core-input" validate="{{validation}}" on-change="{{inputCommited}}">
</paper-input-decorator>
</section>
</template>
<script>
Polymer({
inputCommited: function () {
this.$.decorator.isInvalid = !this.$.custominput.validity.valid;
}
});
</script>
So far I've tried accessing the input element and set 'attr' from the script, I thought it wouldn't work, but was worth the try. I just have no idea about how to approach this, I feel like there must be an easy answer but cant think of it.
Also (and unrelated), I think I'm doing something else wrong, since the paper-input-decorator won't 'take' the inputError value.
Thanks for reading :)
Required is a conditional attribute, so you can set it on the input element like so:
<polymer-element name="custom-core-input"
attributes="columnId inputError validation required">
<template>
<section>
<paper-input-decorator id="decorator"
error="{{inputError}}"
autovalidate>
<input id="custominput" is="core-input"
validate="{{validation}}"
on-change="{{inputCommited}}"
required?="{{required}}">
</paper-input-decorator>
</section>
</template>
<script>
Polymer('custom-core-input', {
required: false
});
</script>
</polymer-element>
Note that the required attribute of custom-core-input must be initialized to false (or true, depending on your defaults).
The error message is only displayed if the input is invalid. So one option is to set the autovalidate attribute. Set required and inputError on your custom-core-input and you will see the error message on page load. More generally you want to set isInvalid to true or false depending on the current input validity.
Here is one way to do it, in the element prototype:
<script>
Polymer({
ready: function () {
//check the "custom-core-input" required attribute:
if (this.required)
//select the input element by Id, and set Required attr to True:
this.$.custominput.required = true;
}
});
</script>
Related
I am trying to get two way data-binding between a host element and a template in Polymer using templatizer. For example if I am trying to keep two input boxes in-sync:
<html>
<body>
<my-element>
<template >
<input type="text" value="{{test::change}}" />
<div>The value of 'test' is: <span>{{test}}</span></div>
</template>
</my-element>
<dom-module id="my-element">
<template>
<input type="text" value="{{test::change}}" />
value:
<p>{{test}}</p>
<div id="items"></div>
<content id="template"></content>
</template>
</dom-module>
<script>
Polymer({
is: 'my-element',
test: {
type: String,
value: "a"
},
behaviors: [ Polymer.Templatizer ],
_forwardParentProp: function(prop, value) {debugger},
_forwardParentPath: function(path, value) {debugger},
_forwardInstanceProp: function(inst, prop, value) {debugger},
_forwardInstancePath: function(inst, path, value) {debugger},
ready: function() {
this._instanceProps = {
test: true
};
var templates = Polymer.dom(this.$.template).getDistributedNodes();
template = templates[1];
this.templatize(template);
var itemNode = this.stamp({ test: this.test});
Polymer.dom(this.$.items).appendChild(itemNode.root);
}
});
</script>
</body>
</html>
In the above code I hit the debugger in the _forwardInstanceProp but not any of the others. Why is this? Inside _forwardInstanceProp I can access my-element and manually update the test property. Is there a better way to do this? I also could add an observer on my-element to the test property and then propagate any changes in my-element to the template. Is there a better way to do that? I am just trying to understand what all four of these methods do and when/why they should be used.
It beats my why I can never get neither _forwardParentPath nor _forwardParentProp to run. However, I know when the other two run :)
_forwardInstanceProp runs for direct properties of model passed to stamp and _instanceProps is initialized:
this._instanceProps = {
text: true
};
var clone = this.stamp({
text: this.text
});
_forwardInstancePath on the other hand runs when you pass nested objects to stamp:
var clone = this.stamp({
nested: {
text: this.text
}
});
See this bin for an example: http://jsbin.com/kipato/2/edit?html,js,console,output
In the stamped template there are two inputs bound to two variables which trigger instanceProp and instancePath. Unfortunately I've been unable to fix the error thrown when the latter happens.
My goal is to append an element to existing dom-if dynamically. Problem is that after appending I can see appended element in the DOM three but it never reacts on condition and stays always hidden.
<template>
<template id="domif" is="dom-if" if="[[condition]]" restamp></template>
</template>
ready() {
var el = document.createElement("input");
Polymer.dom(this.$.domif).appendChild(el);
Polymer.dom.flush();
}
Exploring DOM with hardcoded dom-if and input shows that <input /> element is actually not a child of dom-if but lives next to it..
<template>
<template is="dom-if" if="[[condition]]" restamp>
<input />
</template>
</template>
That gave me a clue that I probably should append my element next to dom-if... But now the biggest question is how to say to dom-if that appended element should be rendered if condition is satisfied. Any ideas?
How about adding a span in your dom-if and appending it to that span?
Update after some comments : We need to use this.async for the item to be found. Using the ready-event only works when the condition is true initially. So you could append the element in a conditionChanged-observer - this is a working example :
<dom-module id='my-element1'>
<template>
<template is="dom-if" if="[[condition]]" restamp>
<span id="appendHere"></span>
</template>
</template>
</dom-module>
<script>
Polymer({
is: 'my-element1',
properties: {
condition: {
type: Boolean,
observer: "_conditionChanged"
}
},
_conditionChanged: function(newVal) {
if (newVal) {
this.async(function() {
var el = document.createElement("input");
Polymer.dom(this.$$("#appendHere")).appendChild(el);
Polymer.dom.flush();
});
}
}
});
</script>
Try it here : http://plnkr.co/edit/1IIeM3gSjHIIZ5xpZKa1?p=preview .
A side-effect of using dom-if in this case is that after setting the condition to false, the element disappears completely and gets added on the next condition-change again. So every change before setting the condition to false gets lost. You could work around it by putting the added element somewhere hidden when the condition changes and getting it back later, but I don't think this is a good idea, if the following is an alternative :
The Polymer-team recommends using dom-if only if there is no other way, like hiding the element. So, if it is possible you also could do something like this (condition has to be true to hide the element) :
<dom-module id='my-element1'>
<template>
<span id="appendHere" hidden$="[[condition]]"></span>
</template>
</dom-module>
<script>
Polymer({
is: 'my-element1',
properties: {
condition: Boolean
},
ready: function() {
var el = document.createElement("input");
Polymer.dom(this.$.appendHere).appendChild(el);
Polymer.dom.flush();
}
});
</script>
Try it here :
http://plnkr.co/edit/mCtwqmqtCPaLOUveOqWS?p=preview
The template element itself will not be added to the DOM, this is the reason you can't access it using querySelector or getElementXxx
I don't know how I am supose to use the updateLabelVisiblity() function on a paper-input-decorator element. This should work but it doesn't!
In my plunker a normal inputs value is connected to a paper-inputs value. Whenever I type something in my normal input a function is called. That function calls validate() and updateLabelVisiblity.
Here is a plunker and here is my Polymer-element.
<polymer-element name='my-input'>
<template>
<h3>Paper input (linked)</h3>
<paper-input-decorator id='myPaperInput' label='Field' error='error' floatingLabel autovalidate>
<input is='core-input' pattern='^[0-9]*$' value='{{something}}'>
</paper-input-decorator>
<h3>Normal input (linked)</h3>
<input value='{{something}}' on-keyup='{{mykeyup}}'>
<p>
Why doesn't the label show above the paper-input when i start typing in the <b>Normal Input</b>?
</p>
</template>
<script>
Polymer({
mykeyup: function(){
this.$.myPaperInput.validate();
this.$.myPaperInput.updateLabelVisibility();
}
});
</script>
</polymer-element>
Solved
mykeyup: function(){
var p = this.$.myPaperInput;
p.validate();
p._autoLabelVisible = p.querySelector('input').value !== '' ? false : true;
}
I see what's happening. The updateLabelVisibility requires the value in order to show the floating label. However instead using updateLabelVisibility you can also do this hack:
this.$.myPaperInput._autoLabelVisible = false;
Which basically just hard sets the value that updateLabelVisibility is setting.
Here is your code, just updated:
http://plnkr.co/edit/l4xQBv7PKft2zqARnPu1?p=preview
Reference:
https://github.com/Polymer/paper-input/blob/master/paper-input-decorator.html#L474
In the following code:
<body unresolved fullbleed layout vertical>
<template is="auto-binding" id="app">
<core-ajax auto url="http://testesapi.azurewebsites.net/api/padaria" params='{"alt":"json", "q":"chrome"}' handleAs="json" response="{{produtos}}" id="ajax"></core-ajax>
<template id="template2" repeat="{{prod in produtos}}">
<form class="myForm" is="ajax-form" action="http://testesapi.azurewebsites.net/api/padaria" method="put">
<input type="hidden" name="id" is="core-input" value="{{prod.id}}">
<paper-input name="nome" label="Nome" value="{{prod.nome}}" floatinglabel></paper-input>
<paper-input name="Preco" label="Preço" value="{{prod.Preco}}" floatinglabel>></paper-input>
<button type="submit">SALVAR</button>
</form>
</template>
</template>
</body>
How can I add an Event Listener to ".myForm"? I need to call core-ajax go() method after ajax-form is 'submitted'.
My problem is that querySelectorAll('.myForm') is resulting null, so it appears it's not in the DOM yet.
I tried to put querySelector inside this (but no success):
app.addEventListener('template-bound', function() {});
It's a Polymer app.
Update 1
I got take the nested template giving it an id of "template2" and:
var app = document.querySelector('#app');
app.addEventListener('template-bound', function()
var template2 = app.$.template2;
<== question now is: how to "for each" the forms inside template2 to add an Event Listener?
});
Have you tried just adding declarative event handlers (on-event attributes)? ajax-form has submitting and submitted events, so presumably you could do something like:
<form class="myForm" is="ajax-form" on-submitting="myHandler" action="http://testesapi.azurewebsites.net/api/padaria" method="put">
With querySelectorAll('.myForm')[0] this specifies the 1st element of that kind.
Currently for perfrormance (tiny gain) you can use getElementById() if you have just 1 form.
Edit:
Here's a rough example of using querySelector & querySelectorAll.
var form = document.querySelectorAll('.myForm')[0].style.backgroundColor = 'red';
var form = document.querySelector('.myForm2').style.backgroundColor = 'green';
For created elements querySelectorAll is useless as it only returns a static list.You can create an element and get the element via the example using ID as it returns the actual node list.
var section = document.getElementById('section');
section.children[3];
https://jsfiddle.net/kroq55td/1/
I've a custom element which, among other things, has a core-input and a paper button in it.
When the element is created, the input is disabled, and I want to enable it when I tap the button.
I've tried several ways and can't access the input's attribute.
<paper-input-decorator label="Nombre de usuario" floatingLabel>
<input id="usernameinput" value="{{UserName}}" is="core-input" disabled />
</paper-input-decorator>
<paper-button raised id="edprobutton" on-tap="{{edbutTapped}}">EDITAR</paper-button>
What should I write in
edbutTapped: function () {
},
EDIT
So, I've learned that the problem was that my username input element was inside a repeat template, and that's bad for what I was trying to do. Now I'm trying to bind a single json object to my element, with no luck so far.
What I have right now:
In my Index page:
<profile-page id="profpage" isProfile="true" entity="{{profEntity}}"></profile-page>
<script>
$(document).ready(function () {
var maintemplate = document.querySelector('#fulltemplate');
$.getJSON('api/userProfile.json', function (data) {
var jsonString = JSON.stringify(data);
alert(jsonString);
maintemplate.profEntity = jsonString;
});
}
</script>
In my element's page:
<polymer-element name="profile-page" attributes="isprofile entity">
<template>
<style>
[...]
</style>
<div flex vertical layout>
<core-label class="namepro">{{entity.Name}}</core-label>
<core-label class="subpro">{{entity.CompanyPosition}}</core-label>
<core-label class="subpro">{{entity.OrgUnitName}}</core-label>
</div>
</template>
</polymer-element>
And my JSON looks like this:
{"Name": "Sara Alvarez","CompanyPosition": "Desarrollo","OrgUnitName": "N-Adviser"}
I'm asuming I need to "update" my element somehow after changing its entity attribute?
Try the following
<script>
Polymer({
edbutTapped: function () {
this.$.usernameinput.disabled = false;
}
});
</script>
The this.$ allows you to access controls defined in an elements and the usernameinput is the id you assigned to the input.
This can go below the closing tag of the element you are defining.
'disabled' is conditional-attribute.
So this will be the correct use of it:
<input id="usernameinput" value="{{UserName}}" is="core-input" disabled?="{{isDisabled}}" />
In the prototype:
//first disable the field, can be done in ready callback:
ready: function () {
this.isDisabled = 'true';
}
//set idDisabled to 'false' i.e. enable the input
edbutTapped: function () {
this.isDisabled = 'false';
},
OK this is going to be a long answer (hence why I am not entering this as an edit of my original answer). I've just done something which is functionally the same.
The first thing is this code;
$.getJSON('api/userProfile.json', function (data) {
var jsonString = JSON.stringify(data);
alert(jsonString);
maintemplate.profEntity = jsonString;
});
Polymer has a control called core-ajax - this as it's name suggests makes an ajax call. The other really nice thing is that it can be made to execute when the URL changes. This is the code from the project I've got.
<core-ajax id="ajax"
auto=true
method="POST"
url="/RoutingMapHandler.php?Command=retrieve&Id=all"
response="{{response}}"
handleas="json"
on-core-error="{{handleError}}"
on-core-response="{{handleResponse}}">
</core-ajax>
The auto is the bit which tells it to fire when the URL changes. The description of auto from the polymer documentation is as follows;
With auto set to true, the element performs a request whenever its
url, params or body properties are changed.
you don't need the on-core-response but the on-core-error might be more useful. For my code response contains the JSON returned.
So for your code - it would be something like this
<core-ajax id="ajax"
auto=true
method="POST"
url="/api/userProfile.json"
response="{{jsonString}}"
handleas="json"
on-core-error="{{handleError}}" >
</core-ajax>
Now we have the data coming into your project we need to handle this. This is done by making use of Polymer's data-binding.
Lets detour to the element you are creating. Cannot see anything wrong with the following line.
<polymer-element name="profile-page" attributes="isprofile entity">
We have an element called 'profile-page' with two properties 'isprofile' and 'entity'.
Only because my Javascript leaves a bit to be desired I would pass each property as a seperate entity making that line
<polymer-element name="profile-page" attributes="isprofile name companyposition OrgUnitName">
Then at the bottom of your element define a script tag
<script>
Polymer({
name: "",
companyposition: "",
OrgUnitName: ""
});
</script>
Now back to the calling (profile-page). The following code (from my project) has the following;
<template repeat="{{m in response.data}}">
<map-list-element mapname="{{m.mapName}}" recordid="{{m.Id}}" on-show-settings="{{showSettings}}">
</map-list-element>
</template>
Here we repeat the following each element. In your case you only have one entry and it is stored in jsonString so your template is something like this
<template repeat="{{u in jsonString}}">
<profile-page name="{{u.name}} companyposition="{{u.companyposition}}" OrgUnitName="{{u.OrgUnitName}}">
</profile-page>
</template>
Now we get to the issue you have. Return to your profie-page element. Nothing wrong with the line
on-tap="{{edbutTapped}}"
This calls a function called edbutTapped. Taking the code I gave you earlier
<script>
Polymer({
edbutTapped: function () {
this.$.usernameinput.disabled = false;
}
});
</script>
The only thing to change here is add the following code
created: function() {
this.$.usernameinput.disabled = true;
},
This is inserted after the Polymer({ line. I cannot see in your revised code where the usernameinput is defined but I am assuming you have not posted it and it is defined in the element.
And you should be working, but remember to keep your case consistent and to be honest I've not been - certain parts of Polymer are case sensitive - that catches me out all the time :)