我在 polymer 中声明了以下元素
<polymer-element name="Map-List-Element" attributes="mapName recordId">
<template>
<style>
:host {
display: block;
position: relative;
background-color:#fff;
padding: 20px;
font-family: 'Roboto';
font-size:14px;
font-weight:400;
margin-bottom:10px;
border: 1px solid #ddd;
}
core-label {
margin-bottom:20px;
display:block;
}
core-icon {
color:#A0A0A0;
margin-right:10px;
cursor:pointer;
}
</style>
<core-label>{{mapName}}</core-label>
<span flex></span>
<core-icon-button icon="av:play-arrow"></core-icon-button>
<core-icon icon="settings" on-tap="{{settingsClicked}}"></core-icon>
<core-icon icon="delete"></core-icon>
<content/>
</template>
<script>
Polymer({
mapName: "",
recordId: 0,
settingsClicked: function (event, detail, sender) {
this.fire('show-Settings', { recordId: this.recordId, mapName: this.name });
}
});
</script>
</polymer-element>
依次由以下自定义元素调用
<link rel="import" href="elements.html" />
<link rel="import" href="Map-List-Element.html" />
<polymer-element name="Map-List">
<template>
<template repeat="{{m in response.data}}">
<map-list-element mapname="{{m.mapName}}" recordid="{{m.Id}}" on-show-settings="{{showSettings}}">
</map-list-element>
</template>
<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>
</template>
<script>
Polymer('Map-List', {
created: function () {
},
handleError: function (event, detail, sender) {
},
handleResponse: function (event,detail,sender) {
},
showSettings: function (event, detail, sender) {
alert('Fired showSettings');
}
});
</script>
</polymer-element>
当我单击带有设置图标的核心图标时,它会调用“settingsClicked”函数。不会调用包含另一个警报的 Map-List 元素中的“事件处理程序” - 不会显示“showSettings”中的警报。
鉴于 Map-Element 元素中声明的事件,如何在 Map-List 中创建事件处理程序?
最佳答案
您的事件处理程序声明是正确的(on-show-settings="{{showSettings}}"
和相应的函数)。
但是 fire
语句中有一个拼写错误。事件名称必须全部小写。因此,将 this.fire('show-Settings'
替换为 this.fire('show-settings'
),您的代码就可以工作了。
关于javascript - 在 polymer 中声明事件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28674911/