This specification defines a JavaScript API to enable web developers to incorporate speech recognition and synthesis into their web pages. It enables developers to use scripting to generate text-to-speech output and to use speech recognition as an input for forms, continuous dictation and control. The JavaScript API allows web pages to control activation and timing and to handle results and alternatives. The Web Speech API aims to enable web developers to provide, in a web browser, speech-input and text-to-speech output features that are typically not available when using standard speech-recognition or screen-reader software.
The API is designed to enable both brief one-shot speech input and continuous speech input. Speech recognition results are provided to the web page as a list of hypotheses, along with other relevant information for each hypothesis. That report is entirely informative since it is not a standards track document. All portions of that report may be considered informative with regards to this document, and provide an informative background to this document.
This specification is a fully-functional subset of that report. This subset supports the majority of use-cases and sample code in the Incubator Group Final Report. This subset does not preclude future standardization of additions to the markup, API or underlying transport protocols, and indeed the Incubator Report defines a potential roadmap for such future work. This specification supports the following use cases, as defined in Section 4 of the Incubator Report. To keep the API to a minimum, this specification does not directly support the following use case.
Above the preview, you can choose the actions you want to take. Additional actions like undo, redo, and zoom are also available. For more options such as stroke size, font color, etc.
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Then you have to print it out Not anymore! Your files are safe with us! Input parameters must have the data type Dictionary of [Text, Text]. For example, the following code defines a Dictionary of [Text, Text] variable and adds a single key and value pair to dictionary on the variable. Define a global variable of the data type Integer that will be used to assign the background task an identification number.
You don't have to assign a value to this variable. The ID is assigned automatically when the background task is enqueued. First, determine where in the code that you want to call the background task from. For this reason, we recommend that you don't enqueue the background task from the OnOpenPage or OnValidate triggers.
There are some scenarios where you want to enqueue a page background task again, after it's been initially enqueued. For example:. For detailed examples, see the PageBackgroundTask. Use this pattern cautiously to avoid endless looping and applying excessive load on the server. If this limit is exceeded, enqueuing will fail. The following example extends Customer Card page of the base application to include three fields for displaying times that are calculated in a page background task.
When a page background task completes successfully, the OnPageBackgroundTaskComplete trigger of the page in the parent session is called, and the results of the task are passed to the trigger.
The results are passed as a dictionary of text. You add code to the trigger to handle the results. This operation typically includes updating the record in the page UI with the calculated values and caching the results in the database. The following example modifies the OnPageBackgroundTaskCompleted trigger to update the page with the started and finished times that were calculated in the page background task, and displays a notification that the times have been updated.
With errors that occur in the page background codeunit, you can control how the errors affect the client UI and the resultant data. For example, some errors are more severe than others. Users should be notified when an error occurs in some cases. Other times, the error can be ignored. When an error occurs in the page background task codeunit, the OnPageBackgroundTaskError trigger of the page in the parent session is automatically called with information about the error. To handle these errors, you can either use the OnPageBackgroundTaskError trigger as-is, that is with no custom code, or you can add custom code to the trigger to handle the errors separately.
If you want all errors that occur in the background task to be handled according to the severity level that was specified for the background task when it was enqueued, then don't add any code to the OnPageBackgroundTaskError trigger. For this implementation, you can either add the empty OnPageBackgroundTaskError trigger or omit the trigger entirely.
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