Jos*_* M. 1 javascript aurelia aurelia-binding
使用Aurelia,我说我有一个自定义元素<panel>和一个视图/视图模型InfoPanel.<panel>有一个关闭按钮,它应该执行一些操作InfoPanel,例如调用该close()功能.
Panel.html
<template>
<h1>${headerText}</h1>
<button click.delegate="close()">x</button>
<content></content>
</template>
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Panel.js
@bindable({name: "headerText"})
@bindable({name: "close"})
export class Panel {
}
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InfoPanel.html
<template>
<require from="./Panel"></require>
<panel header-text="Info" close.bind="close">
<!-- content here -->
</panel>
</template>
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InfoPanel.js
export class InfoPanel {
close() {
// At this point, "this" referse to the Panel, not the InfoPanel instance.
}
}
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当我尝试这个时,我收到以下错误:
未捕获错误:close不是函数
getFunction @ aurelia-binding.js:2033
评估@ aurelia-
binding.js :1395 callSource @ aurelia-binding.js:4842
(匿名函数)@ aurelia-binding.js:4867
handleDelegatedEvent @ aurelia -binding.js:2972
我的假设是Aurelia的背景不清楚,或者我遗漏了一些东西......
你想要做的是可能的,但有一些陷阱 -
Panel.html
<template>
<h1>${headerText}</h1>
<button click.delegate="close()">x</button>
<content></content>
</template>
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要使panel.html绑定到close,我们需要默认将它设为匿名函数.我正在使用ES7类实例字段(类属性的长名称),但您可以将装饰器用作类装饰器,只要您正确设置它 -
Panel.js
export class Panel {
@bindable headerText = '';
@bindable close = () => {};
}
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您需要使用call传递函数引用而不是bind尝试评估表达式 -
InfoPanel.html
<template>
<require from="./Panel"></require>
<panel header-text="Info" close.call="close()">
<!-- content here -->
</panel>
</template>
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InfoPanel.js
export class InfoPanel {
close() {
}
}
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