javascript 访问器属性错误：无法重新定义不可配置的属性“状态”
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Error in accessor property: can't redefine non-configurable property 'status'
提问by Saeed Neamati
I'm trying to define an object and create an accessor propertyfor it.
我正在尝试定义一个对象并为其创建一个访问器属性。
HTML:
HTML：
<input type='hidden' id='crudMode' value='Create' />
JavaScript:
JavaScript：
crudMode = {
create: "Create",
read: "Read",
update: "Update",
delete: "Delete",
current: function () { return $('#crudMode').val(); }
}
Object.defineProperty(crudMode, 'mode', {
get: function(){
return this.current();
},
set: function(value){
$('#crudMode').val(value);
}
});
But when I use it, it throws the mentioned error in the question title:
但是当我使用它时，它会在问题标题中抛出提到的错误：
console.log(crudMode.mode);
Throws:
抛出：
TypeError: can't redefine non-configurable property 'mode'
类型错误：无法重新定义不可配置的属性“模式”
What's wrong here?
这里有什么问题？
回答by Matthew Wilson
MDC documentation says that, as well as 'get' and 'set', you need a flag 'configurable' set to true when calling Object.defineProperty.
MDC 文档说，除了 'get' 和 'set'，在调用 Object.defineProperty 时，您还需要将标志 'configurable' 设置为 true。
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/defineProperty
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/defineProperty
