发布订阅,需要知道哪些地方用到了当前属性的值,在属性值变化时,要更新这些地方 functionSubpub() {this.subList= []//保存订阅某个属性的订阅者}Subpub.prototype.addSub=function(watcher) {this.subList.push(watcher) }//通知订阅者们,数据变化了,你们要各自行动了Subpub.prototype.notice=function() {this.s...
Add Items and Objects to an Array Using the push() Function in JavaScript To add items and objects to an array, you can use the push() function in JavaScript. The push() function adds an item or object at the end of an array. For example, let’s create an array with three values...
Excel JavaScript API:随 Office 2016 一起引入的 ExcelJavaScript API 提供了强类型的Excel对象,可用于访问工作表、区域、表格、图表等。 通用API:随 Office 2013 一起引入的通用 API 使你能够访问在多种类型的 Office 应用程序中通用的功能,如 UI、对话框和客户端设置。Common API 中 Excel 交互的有限功能已被...
While you'll likely use the Excel JavaScript API to develop the majority of functionality, you'll also use objects in the Common API. For example: Context: TheContextobject represents the runtime environment of the add-in and provides access to key objects of the API. It consists of workboo...
The development setup for Project Online add-ins uses the Visual Studio SharePoint Add-in project type. The add-in is written in JavaScript, and uses the Project JavaScript object model (JSOM) to interact with the Project Online service. The JSOM inherits much of...
For each own property key P of O such that Type(P) is String and P is not an array index, in ascending chronological order of property creation, do a. Add P as the last element of keys. For each own property key P of O such that Type(P) is Symbol, in ascending chronological ord...
Context object: for access to content and display language properties. RoamingSettings object: for saving Outlook add-in-specific custom settings to the user's mailbox where the add-in is installed.For information about using JavaScript in Outlook add-ins, see Outlook add-ins.Collaborate...
1. Setup 搜索 big objects 以后选择Big Objects既可以查看当前的所有的 Big Objects,我们点击 new就可以新建一个 Big Object. 下图中是我们创建的一个 big object。可以看到目前的状态是 In Development,只有存在自定义索引字段才可以变成 development。
First, create an object whose prototype isproto. Then, if the optional parameterpropDescObjhas been specified, add properties to it – in the same manner asObject.defineProperties. Finally, return the result. For example, the following code snippet produces the same result as the previous snippet...
You normally shouldn’t add properties to built-in prototypes and objects, but if you do, you should make them non-enumerable to avoid breaking code. As we have seen, non-enumerability mostly benefits for-in and ensures that legacy code using it won’t break. The non-enumerable ...