Object.defineProperty(book, 'name', { value: 'bkk', enumerable: true, configurable: false, writable: true }); console.log(book.name) //bkk Object.defineProperties() 功能:方法将直接在对象上定义一个或多个新的属性或修改现有属性,并返回该对象 语法:Object.defineProperties(obj,props) obj:将要被...
varperson = {};Object.defineProperty(person,'name', {configurable:false,value:'John'}) ;deleteperson.name// 严格模式下抛出错误console.log(person.name)// 'John' 没有删除Object.defineProperty(person,'name', {configurable:true//报错});Object.defineProperty(person,'name', {enumerable:2//报错});...
vue-responsive: Vue.js(2.x) directive to hide/show HTML-elements with the Bootstrap 4, 3 or self defined breakpoints. Form Form Builder - Json template based form builder, based on Vue and Laravel. vue-autofocus-directive - Vue autofocus directive. FormKit - Vue 3 form development. 10x ...
propertiesObject附加的属性值。 ArcOptions 轨迹图配置参数。 属性名称类型说明 pickStyleFunction轨迹图样式映射函数,接收ArcLine数据返回对应样式,样式对象规范详见。 animatableBoolean是否开启动画,默认为true(即将下线,请使用processAnimation设置enable属性)。 opacityNumber弧线透明度,取值范围(0, 1],默认0.5,(即将下线,请...
Sometimes, when writing test, we want to validate that some specific properties are present, and the mere presence of additional keys are not exactly relevant for that specific test. For this use case, we can now use assert.partialDeepStrictEqual, which should be familiar to those already usin...
propertiesObject(可选)附加的属性值。 TrailPoint 单条轨迹数据规范。 索引类型说明 0Number纬度。 1Number经度。 2Number | String(可选)时间戳,支持Unix Timestamp或者符合RFC2822的字符串,若不传入时间点,则默认以1m/s匀速移动。 TrailOptions 轨迹图配置参数。
JSObject() 此API 支持产品基础结构,不能在代码中直接使用。 初始化 JSObject 类的新实例。字段展开表 engine 此API 支持产品基础结构,不能在代码中直接使用。 存储对脚本引擎的引用。 (继承自 ScriptObject) field_table 此API 支持产品基础结构,不能在代码中直接使用。 存储在对象中动态添加和移除的字...
1.定义属性的函数有两个:object.defineproperty和object.defineproperties。例如:object.defineproperty(obj,propname,desc) 2.在引擎内部,会转换成这样的方法调用:obj。[[defineownproperty]](propname,desc,true) 2.2.5属性赋值 1.赋值运算符(=)就是在调用[[put]]...
Applications often retrieve object graphs where objects have properties whose values are arrays of objects that may also contain other arrays of objects. These scenarios can quickly become difficult to manage when nesting multiple {{for}} statements. Consider a customer object may have orders, which...
Applications often retrieve object graphs where objects have properties whose values are arrays of objects that may also contain other arrays of objects. These scenarios can quickly become difficult to manage when nesting multiple {{for}} statements. Consider a customer object may have...