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Considering defining a polymer element
<dom-module id="custom-element">
<template>
<h1>I expect to be green</h1>
</template>
<script>
Polymer({
is: 'custom-element',
properties: {
color: {
type: String,
value: 'red'
}
},
ready: function() {
this.style.color = this.color;
}
});
</script>
</dom-module>
I would expect that the following two would produce the same result:
(in markup)
<body>
<custom-element color="green"></custom-element>
</body>
(in JS)
var customElement = document.createElement('custom-element');
customElement.color = 'green';
document.body.appendChild(customElement);
But in fact it doesn't, as it seems that the properties are set and the polymer 'ready' function is triggered before the customElement is appended to document.body.
So basically I cannot dynamically create (in JS) custom elements and set them initial properties, different than the default properties.
How would you suggest I should do that?
Thanks!
335
Set the color in attached callback instead of ready. Attached is called after the element has been appended in dom.
<base href="https://polygit.org/components/">
<script src="wecomponentsjs/webcomponents-lite.min.js"></script>
<link rel="import" href="polymer/polymer.html">
<dom-module id="custom-element">
<template>
<h1>I expect to be green</h1>
</template>
<script>
Polymer({
is: 'custom-element',
properties: {
color: {
type: String,
value: 'red'
}
},
attached: function() {
this.style.color = this.color;
}
});
</script>
</dom-module>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
var customElement = document.createElement('custom-element');
customElement.color = 'green';
document.body.appendChild(customElement);
</script>
</body>
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