绑定到属性(单向)时,有两个选项可以与attr-name.bind="variable"
绑定(也尝试单向和一次)或使用插值attr-name="${variable}"
,无论哪种方式但是,如果您尝试绑定到名称空间元素(如xlink:href),则当前获得:
Uncaught NamespaceError:无法执行'setAttributeNS' 'Element':''是属性的无效命名空间。
在控制器page.js中有以下内容:
export class page {
constructor(){
this.icon = 'blah';
}
}
以及page.html中的以下内容:
<template>
<svg class="icon ${icon}">
<use xlink:href="${icon}"></use>
</svg>
</template>
正如我所说,上面的任何一个绑定都会抛出给定的错误。
有关如何绑定此命名空间属性的任何想法吗?
检测bootstrap handleApp函数以打印完整的堆栈跟踪:
Error: Failed to execute 'setAttributeNS' on 'Element': '' is an invalid namespace for attributes.
at Error (native)
at OoPropertyObserver.setValue (http://localhost:9000/jspm_packages/github/aurelia/binding@0.3.3/system/property-observation.js:200:26)
at InterpolationBinding.setValue (http://localhost:9000/jspm_packages/github/aurelia/templating-binding@0.8.4/system/binding-language.js:214:35)
at InterpolationBinding.bind (http://localhost:9000/jspm_packages/github/aurelia/templating-binding@0.8.4/system/binding-language.js:202:22)
at View.bind (http://localhost:9000/jspm_packages/github/aurelia/templating@0.8.9/system/view.js:65:29)
at ViewFactory.create (http://localhost:9000/jspm_packages/github/aurelia/templating@0.8.9/system/view-factory.js:173:22)
at BoundViewFactory.create (http://localhost:9000/jspm_packages/github/aurelia/templating@0.8.9/system/view-factory.js:128:39)
at Repeat.processItems (http://localhost:9000/jspm_packages/github/aurelia/templating-resources@0.8.6/system/repeat.js:105:36)
at Repeat.bind (http://localhost:9000/jspm_packages/github/aurelia/templating-resources@0.8.6/system/repeat.js:60:22)
at BehaviorInstance.bind (http://localhost:9000/jspm_packages/github/aurelia/templating@0.8.9/system/behavior-instance.js:67:39)
此外,如果我破解属性观察代码以明确设置它可以工作的命名空间,但这确实很糟糕,很可能会很快崩溃。
https://github.com/aurelia/binding/blob/master/src/property-observation.js#L153-L159改为:
setValue(newValue) {
if (this.isSVG) {
if(this.propertyName.indexOf('xlink:') >= 0){
this.obj.setAttributeNS("http://www.w3.org/1999/xlink", this.propertyName, newValue);
} else {
this.obj.setAttributeNS(null, this.propertyName, newValue);
}
} else {
this.obj[this.propertyName] = newValue;
}
}
答案 0 :(得分:3)
由于https://github.com/aurelia/binding/issues/34,现在明确支持处理aurelia中的命名空间元素。无需做任何特别的事情。这适用于使用命名空间的HTML和HTML5问题。