Word.CustomProperty class

Represents a custom property.

Extends

Remarks

[ API set: WordApi 1.3 ]

Examples

// Link to full sample: https://raw.githubusercontent.com/OfficeDev/office-js-snippets/prod/samples/word/30-properties/read-write-custom-document-properties.yaml

await Word.run(async (context) => {
    const properties: Word.CustomPropertyCollection = context.document.properties.customProperties;
    properties.load("key,type,value");

    await context.sync();
    for (let i = 0; i < properties.items.length; i++)
        console.log("Property Name:" + properties.items[i].key + "; Type=" + properties.items[i].type + "; Property Value=" + properties.items[i].value);
});

Properties

context

The request context associated with the object. This connects the add-in's process to the Office host application's process.

key

Gets the key of the custom property.

type

Gets the value type of the custom property. Possible values are: String, Number, Date, Boolean.

value

Specifies the value of the custom property. Note that even though Word on the web and the docx file format allow these properties to be arbitrarily long, the desktop version of Word will truncate string values to 255 16-bit chars (possibly creating invalid unicode by breaking up a surrogate pair).

Methods

delete()

Deletes the custom property.

load(options)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

load(propertyNames)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

load(propertyNamesAndPaths)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

set(properties, options)

Sets multiple properties of an object at the same time. You can pass either a plain object with the appropriate properties, or another API object of the same type.

set(properties)

Sets multiple properties on the object at the same time, based on an existing loaded object.

toJSON()

Overrides the JavaScript toJSON() method in order to provide more useful output when an API object is passed to JSON.stringify(). (JSON.stringify, in turn, calls the toJSON method of the object that's passed to it.) Whereas the original Word.CustomProperty object is an API object, the toJSON method returns a plain JavaScript object (typed as Word.Interfaces.CustomPropertyData) that contains shallow copies of any loaded child properties from the original object.

track()

Track the object for automatic adjustment based on surrounding changes in the document. This call is a shorthand for context.trackedObjects.add(thisObject). If you're using this object across .sync calls and outside the sequential execution of a ".run" batch, and get an "InvalidObjectPath" error when setting a property or invoking a method on the object, you need to add the object to the tracked object collection when the object was first created. If this object is part of a collection, you should also track the parent collection.

untrack()

Release the memory associated with this object, if it has previously been tracked. This call is shorthand for context.trackedObjects.remove(thisObject). Having many tracked objects slows down the host application, so please remember to free any objects you add, once you're done using them. You'll need to call context.sync() before the memory release takes effect.

Property Details

context

The request context associated with the object. This connects the add-in's process to the Office host application's process.

context: RequestContext;

Property Value

key

Gets the key of the custom property.

readonly key: string;

Property Value

string

Remarks

[ API set: WordApi 1.3 ]

type

Gets the value type of the custom property. Possible values are: String, Number, Date, Boolean.

readonly type: Word.DocumentPropertyType | "String" | "Number" | "Date" | "Boolean";

Property Value

Word.DocumentPropertyType | "String" | "Number" | "Date" | "Boolean"

Remarks

[ API set: WordApi 1.3 ]

value

Specifies the value of the custom property. Note that even though Word on the web and the docx file format allow these properties to be arbitrarily long, the desktop version of Word will truncate string values to 255 16-bit chars (possibly creating invalid unicode by breaking up a surrogate pair).

value: any;

Property Value

any

Remarks

[ API set: WordApi 1.3 ]

Method Details

delete()

Deletes the custom property.

delete(): void;

Returns

void

Remarks

[ API set: WordApi 1.3 ]

load(options)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

load(options?: Word.Interfaces.CustomPropertyLoadOptions): Word.CustomProperty;

Parameters

options
Word.Interfaces.CustomPropertyLoadOptions

Provides options for which properties of the object to load.

Returns

load(propertyNames)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

load(propertyNames?: string | string[]): Word.CustomProperty;

Parameters

propertyNames

string | string[]

A comma-delimited string or an array of strings that specify the properties to load.

Returns

load(propertyNamesAndPaths)

Queues up a command to load the specified properties of the object. You must call context.sync() before reading the properties.

load(propertyNamesAndPaths?: {
            select?: string;
            expand?: string;
        }): Word.CustomProperty;

Parameters

propertyNamesAndPaths

{ select?: string; expand?: string; }

propertyNamesAndPaths.select is a comma-delimited string that specifies the properties to load, and propertyNamesAndPaths.expand is a comma-delimited string that specifies the navigation properties to load.

Returns

set(properties, options)

Sets multiple properties of an object at the same time. You can pass either a plain object with the appropriate properties, or another API object of the same type.

set(properties: Interfaces.CustomPropertyUpdateData, options?: OfficeExtension.UpdateOptions): void;

Parameters

properties
Word.Interfaces.CustomPropertyUpdateData

A JavaScript object with properties that are structured isomorphically to the properties of the object on which the method is called.

options
OfficeExtension.UpdateOptions

Provides an option to suppress errors if the properties object tries to set any read-only properties.

Returns

void

set(properties)

Sets multiple properties on the object at the same time, based on an existing loaded object.

set(properties: Word.CustomProperty): void;

Parameters

properties
Word.CustomProperty

Returns

void

toJSON()

Overrides the JavaScript toJSON() method in order to provide more useful output when an API object is passed to JSON.stringify(). (JSON.stringify, in turn, calls the toJSON method of the object that's passed to it.) Whereas the original Word.CustomProperty object is an API object, the toJSON method returns a plain JavaScript object (typed as Word.Interfaces.CustomPropertyData) that contains shallow copies of any loaded child properties from the original object.

toJSON(): Word.Interfaces.CustomPropertyData;

Returns

track()

Track the object for automatic adjustment based on surrounding changes in the document. This call is a shorthand for context.trackedObjects.add(thisObject). If you're using this object across .sync calls and outside the sequential execution of a ".run" batch, and get an "InvalidObjectPath" error when setting a property or invoking a method on the object, you need to add the object to the tracked object collection when the object was first created. If this object is part of a collection, you should also track the parent collection.

track(): Word.CustomProperty;

Returns

untrack()

Release the memory associated with this object, if it has previously been tracked. This call is shorthand for context.trackedObjects.remove(thisObject). Having many tracked objects slows down the host application, so please remember to free any objects you add, once you're done using them. You'll need to call context.sync() before the memory release takes effect.

untrack(): Word.CustomProperty;

Returns