(SQL Server) JavaScript console

See more JavaScript Examples

Note: This example requires Chilkat v11.4.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example demonstrates using the built-in console object.
    -- The Javascript run in this example is shown below.

    -- Load the JavaScript from a file.
    DECLARE @sbScript int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbScript OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @sbScript, 'LoadFile', @success OUT, 'qa_data/js_tests/test_console.js', 'utf-8'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @sbScript, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sbScript
        RETURN
      END

    DECLARE @js int
    EXEC @hr = sp_OACreate 'Chilkat.Js', @js OUT

    DECLARE @result int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @result OUT

    -- Run the JavaScript
    -- Results (not console output) go to result.
    -- Note: Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
    -- In this case, the last evaluated expression is console.log which does not calculate a value. Therefore, it returns undefined.
    EXEC sp_OAMethod @js, 'Eval', @success OUT, @sbScript, @result
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @sbScript, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @sbScript
        EXEC @hr = sp_OADestroy @js
        EXEC @hr = sp_OADestroy @result
        RETURN
      END

    -- We can look at the result, which is "undefined", which is normal and expected.
    EXEC sp_OAMethod @result, 'Emit', @sTmp0 OUT
    PRINT @sTmp0
    -- The result JSON is: {"type":"undefined","value":"undefined"}

    -- The console output is retrieved by calling ConsoleOutputSb
    DECLARE @sbOut int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbOut OUT

    EXEC sp_OAMethod @js, 'ConsoleOutputSb', NULL, @sbOut
    EXEC sp_OAMethod @sbOut, 'GetAsString', @sTmp0 OUT
    PRINT @sTmp0

    EXEC @hr = sp_OADestroy @sbScript
    EXEC @hr = sp_OADestroy @js
    EXEC @hr = sp_OADestroy @result
    EXEC @hr = sp_OADestroy @sbOut


END
GO

// Chilkat Js console emits CRLF line endings on Windows, and LF line endings on non-Windows.

console.log("Hello %s, %d, %f", "World", 248, 12.05);
// Output: Hello World, 248, 12.05

// If there are more arguments than the number of specifiers, the extra arguments are output, separated by spaces:
console.log('%s:%s', 'foo', 'bar', 'baz');
// Output: foo:bar baz

// If the first argument does not contain a valid format specifier, outputs a string that is the concatenation of all arguments separated by spaces:
console.log(1,2,3);
// Output: 1 2 3

//If only one argument is passed, it is returned as it is without any formatting:
console.log("%% %s");
// Output: %% %s

const myApp = {
    appName: "Example",
    version: 1.0,
    isDebug: true,
    supportedTypes: ["string", "number", "object"],
    settings: {
        maxWidgets: 1024,
        allowIO: true
    }
};

// %O: Emits the same as JSON.stringify(myConfig, null, 2)
console.log("myApp: %O", myApp);
// Output:
// myApp: {
//   "appName": "Example",
//   "version": 1,
//   "isDebug": true,
//   "supportedTypes": [
//     "string",
//     "number",
//     "object"
//   ],
//   "settings": {
//     "maxWidgets": 1024,
//     "allowIO": true
//   }
// }

console.log("App: %s (Version %d)", myApp.appName, myApp.version);
// Output: App: Chilkat Js (Version 1)