我的代码是这样的。它发生错误 this.saveToCache 不起作用。谁能帮忙?提前谢谢。
<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../bower_components/polymer/polymer-element.html">
<link rel="import" href="shared-styles.html">
<link rel="import" href="../bower_components/iron-localstorage-behavior/iron-localstorage-behavior.html">
<link rel="import" href="../bower_components/paper-button/paper-button.html">
<dom-module id="my-app">
<template>
<paper-button on-click="_insertData">Add<paper-button>
</template>
<script>
class MyApp extends Polymer.Element {
static get is() { return 'my-app'; }
_insertData(){
var key = 123;
var value = Math.random();
this.saveToCache(key, value).then(() => {
alert("Added");
});
}
}
window.customElements.define(MyApp.is, MyApp);
</script>
</dom-module>
你已经导入了你的行为,铁本地存储行为,但似乎你没有把它添加到你的元素中。
由于您使用的是类语法,我猜这是 Polymer 2.x,因此您可以在此处看到需要如何完成它。
所以你的代码将变成:
<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../bower_components/polymer/polymer-element.html">
<link rel="import" href="shared-styles.html">
<link rel="import" href="../bower_components/iron-localstorage-behavior/iron-localstorage-behavior.html">
<dom-module id="my-app">
<template>
<paper-button on-click="_insertData">Add<paper-button>
</template>
<script>
class MyApp extends Polymer.mixinBehaviors([Polymer.IronLocalStorageBehavior], Polymer.Element) {
static get is() { return 'my-app'; }
_insertData(){
var key = 123;
var value = Math.random();
this.saveToCache(key, value).then(() => {
alert("Added");
});
}
}
window.customElements.define(MyApp.is, MyApp);
</script>
</dom-module>