Excel For Mac Json
May 28, 2019 VBA-Web VBA-Web (formerly Excel-REST) makes working with complex webservices and APIs easy with VBA on Windows and Mac. It includes support for authentication, automatically converting and parsing JSON, working with cookies and headers, and much more. If the json file is on your computer, a file, you can enter 'file:c:filename.json' in place of the web url. Don't include the '. The easiest way is to use the file browser.
JSON conversion and parsing for VBA (Windows and Mac Excel, Access, and other Office applications).It grew out of the excellent project vba-json,with additions and improvements made to resolve bugs and improve performance (as part of VBA-Web).
Tested in Windows Excel 2013 and Excel for Mac 2011, but should apply to 2007+.
- For Windows-only support, include a reference to 'Microsoft Scripting Runtime'
- For Mac and Windows support, include VBA-Dictionary
Options
VBA-JSON includes a few options for customizing parsing/conversion if needed:
- UseDoubleForLargeNumbers (Default =
False
) VBA only stores 15 significant digits, so any numbers larger than that are truncated.This can lead to issues when BIGINT's are used (e.g. for Ids or Credit Cards), as they will be invalid above 15 digits.By default, VBA-JSON will useString
for numbers longer than 15 characters that contain only digits, use this option to useDouble
instead. - AllowUnquotedKeys (Default =
False
) The JSON standard requires object keys to be quoted ('
or'
), use this option to allow unquoted keys. - EscapeSolidus (Default =
False
) The solidus (/
) is not required to be escaped, use this option to escape them as/
inConvertToJson
.
Installation
- Download the latest release
- Import
JsonConverter.bas
into your project (Open VBA Editor,Alt + F11
; File > Import File) - Add
Dictionary
reference/class- For Windows-only, include a reference to 'Microsoft Scripting Runtime'
- For Windows and Mac, include VBA-Dictionary
Resources
-->When an Excel custom function is written in JavaScript or TypeScript, JSDoc tags are used to provide extra information about the custom function. The JSDoc tags are then used at build time to create the JSON metadata file. Using JSDoc tags saves you from the effort of manually editing the JSON metadata file.
Important
Note that Excel custom functions are available on the following platforms.
- Office on Windows (version 1904 or later, connected to Office 365 subscription)
- Office on Mac (version 16.24 or later, connected to Office 365 subscription)
- Office on the web
Excel custom functions are currently not supported on iPad or in one-time purchase versions of Office 2019 or earlier.
Add the @customfunction
tag in the code comments for a JavaScript or TypeScript function to mark it as a custom function.
The function parameter types may be provided using the @param tag in JavaScript, or from the Function type in TypeScript. For more information, see the @param tag and Types sections.
Adding a description to a function
The description is displayed to the user as help text when they need help to understand what your custom function does. The description doesn't require any specific tag. Just enter a short text description in the JSDoc comment. In general the description is placed at the start of the JSDoc comment section, but it will work no matter where it is placed.
To see examples of the built-in function descriptions, open Excel, go to the Formulas tab, and choose Insert function. You can then browse through all the function descriptions, and also see your own custom functions listed.
In the following example, the phrase 'Calculates the volume of a sphere.' is the description for the custom function.
JSDoc Tags
The following JSDoc tags are supported in Excel custom functions:
- @customfunction id name
- @helpurl url
- @param{type} name description
- @returns{type}
@cancelable
Icadmac serial. Indicates that a custom function wants to perform an action when the function is canceled.
The last function parameter must be of type CustomFunctions.CancelableInvocation
. The function can assign a function to the oncanceled
property to denote the action to perform when the function is canceled.
If the last function parameter is of type CustomFunctions.CancelableInvocation
, it will be considered @cancelable
even if the tag isn't present.
A function can't have both @cancelable
and @streaming
tags.
@customfunction
Syntax: @customfunction idname
Specify this tag to treat the JavaScript/TypeScript function as an Excel custom function.
This tag is required to create metadata for the custom function.
The following example shows the simplest way to declare a custom function.
id
The id
is an invariant identifier for the custom function.
- If
id
isn't provided, the JavaScript/TypeScript function name is converted to uppercase and disallowed characters are removed. - The
id
must be unique for all custom functions. - The allowed characters are limited to: A-Z, a-z, 0-9, underscores (_), and period (.).
In the following example, increment is the id
and the name
of the function.
name
Provides the display name
for the custom function.
- If name isn't provided, the id is also used as the name.
- Allowed characters: Letters Unicode Alphabetic character, numbers, period (.), and underscore (_).
- Must start with a letter.
- Maximum length is 128 characters.
In the following example, INC is the id
of the function and increment
is the name
.
description
A description doesn't require any specific tag. Add a description to a custom function by adding a phrase to describe what the function does inside the JSDoc comment. By default, whatever text is untagged in the JSDoc comment section will be the description of the function. The description appears to users in Excel as they are entering the function. In the following example, the phrase 'A function that adds two numbers' is the description for the custom function with the id property of ADD
.
In the following example, ADD is the id
and name
of the function and a description is given.
@helpurl
Syntax: @helpurl url
The provided url is displayed in Excel.
In the following example, the helpurl
is www.contoso.com/weatherhelp.
@param
JavaScript
JavaScript Syntax: @param {type} name description
{type}
should specify the type info within curly braces. See the Types section for more information about the types which may be used. Optional: if not specified, the typeany
will be used.name
specifies which parameter the @param tag applies to. Required.description
provides the description which appears in Excel for the function parameter. Optional.
To denote a custom function parameter as optional:
- Put square brackets around the parameter name. For example:
@param {string} [text] Optional text
.
Note
The default value for optional parameters is null
.
The following example shows a ADD function which adds two or three numbers, with the third number as an optional parameter.
TypeScript
TypeScript Syntax: @param name description
name
specifies which parameter the @param tag applies to. Required.description
provides the description which appears in Excel for the function parameter. Optional.
See the Types section for more information about the function parameter types which may be used.
To denote a custom function parameter as optional, do one of the following:
- Use an optional parameter. For example:
function f(text?: string)
- Give the parameter a default value. For example:
function f(text: string = 'abc')
For detailed description of the @param see: JSDoc
Note
The default value for optional parameters is null
.
The following example shows the add
function that adds two numbers.
@requiresAddress
Indicates that the address of the cell where the function is being evaluated should be provided.
The last function parameter must be of type CustomFunctions.Invocation
or a derived type. When the function is called, the address
property will contain the address. For an example of a function that uses the @requiresAddress
tag, see Addressing cell's context parameter.
@returns
Syntax: @returns {type}
Provides the type for the return value.
If {type}
is omitted, the TypeScript type info will be used. If there is no type info, the type will be any
.
The following example shows the add
function that uses the @returns
tag.
@streaming
Used to indicate that a custom function is a streaming function.
The last parameter should be of type CustomFunctions.StreamingInvocation<ResultType>
.The function should return void
.
Streaming functions don't return values directly, but rather should call setResult(result: ResultType)
using the last parameter.
Exceptions thrown by a streaming function are ignored. setResult()
may be called with Error to indicate an error result. For an example of a streaming function and more information, see Make a streaming function.
Streaming functions can't be marked as @volatile.
@volatile
A volatile function is one whose result isn't the same from one moment to the next, even if it takes no arguments or the arguments haven't changed. Excel re-evaluates cells that contain volatile functions, together with all dependents, every time that a calculation is done. For this reason, too much reliance on volatile functions can make recalculation times slow, so use them sparingly.
Streaming functions can't be volatile.
The following function is volatile and uses the @volatile
tag.
Types
By specifying a parameter type, Excel will convert values into that type before calling the function. If the type is any
, no conversion will be performed.
Value types
A single value may be represented using one of the following types: boolean
, number
, string
.
Matrix type
Use a two-dimensional array type to have the parameter or return value be a matrix of values. For example, the type number[][]
indicates a matrix of numbers. string[][]
indicates a matrix of strings.
Error type
A non-streaming function can indicate an error by returning an Error type.
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A streaming function can indicate an error by calling setResult()
with an Error type.
Promise
A function can return a Promise, which will provide the value when the promise is resolved. If the promise is rejected, then it is an error.
Other types
Any other type will be treated as an error.
Next steps
Learn about naming conventions for custom functions. Alternatively, learn how to localize your functions which requires you to write your JSON file by hand.