我想在Polymer 2.x网络应用中为元素实现搜索过滤器。
我在下面的Polymer 1.x中有这个代码,我不知道如何使它在Polymer 2.x中运行
如何从下面的Polymer 1.x中创建代码,以处理此Polymer 2.x页面:
<script>
class Myhome extends Polymer.Element {
static get is() { return 'my-home'; }
}
window.customElements.define(Myhome.is, Myhome);
</script>
<div class="app-grid" style="display: flex;">
<template items="[[data]]">
<div class="item horizontal wrap layout" style="width: 300px; height: 300px; margin: 2%;">
<paper-card heading="[[item.title]]" image="http://lorempixel.com/300/200">
<div class="card-content">[[item.description]]</div>
<div class="card-actions">
<paper-button>Button</paper-button>
</div>
</paper-card>
</div>
</template>
</div>
<script>
Polymer({
is: 'my-home',
properties:{
defaultData:{
type:Array,
value:[{title:'Color picture',description:'An RGB picture'},
{title:'Grey image',description:'That\'s a grey picture'},
{title:'3',description:'this is content 3'}]
},
data:{
type:Array
}
},
ready:function(){
this.data = this.defaultData;
this.$.search.addEventListener('keyup',this.searchChanged.bind(this));
},
searchChanged:function(e){
var querySearch = this.$.search.value.toLowerCase();
if(querySearch == ''){
this.data = this.defaultData;
}else{
this.data = this.defaultData.filter(function(item){
return item.title.toLowerCase().indexOf(querySearch) !== -1 || item.description.toLowerCase().indexOf(querySearch) !== -1;
});
}
}
});
</script>
答案 0 :(得分:1)
您的许多脚本都必须更改,最重要的可能是升级到基于类的元素。 See the relevant section in the Polymer upgrade guide.这将包含adding a call to super.ready()
作为ready()
功能的第一行