如何使用setAttribute更新对象中的一个值? [英] How do I update one value within an object using setAttribute?
问题描述
我有一个元素,其中包含一个称为声音的属性。此声音属性的值是一个对象。此对象的属性之一是体积。
I have an element that contains an attribute called "sound". The value of this sound attribute is an object. One of the properties in this object is "volume".
换句话说:
<a-entity position='0 0 0' sound='src: url; on: click; volume: 2.0;'></a-entity>
所以是这样的:
{
position: '0 0 0',
sound: {
src: 'url',
on: 'click',
volume: '2.0'
}
}
我正在使用setAttribute可以更新volume属性,但是我不知道是否有一种有效的方法来仅将一个属性作为目标,而不更改对象中的其他属性。
I'm using setAttribute to update the volume attribute but I don't know if there's an effective way to only target one property while not changing the other properties in the object.
基本上,这种替换声音对象并删除所有未指定的属性(删除了属性的src AND):
Basically this replaces the sound object and removes all the properties that are not specified (src AND on properties are removed):
element.setAttribute('sound', {
volume: '4'
});
我不想替换整个对象。我只想为一个属性替换一个值。
I don't want to replace the entire object. I only want to replace one value for one property. Is there a best way to go about this?
推荐答案
您可以使用setAttribute的3参数版本,该版本的此处的文档: https://aframe.io/docs /core/entity.html#Updating-Multi-Property-Component-Data
You can make use of the 3-argument version of setAttribute which is in the docs here: https://aframe.io/docs/core/entity.html#Updating-Multi-Property-Component-Data
具体来说,您可以执行以下操作:
Specifically you can do something like:
element.setAttribute("sound", "volume", "4");
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