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JavaScript Form - beforeChange Textarea Event

fires before changing the value of a control

beforeChange: (value: string) => boolean | void;

• value: string - the value to be set for the control

Return false to prevent changing the value of the control; otherwise, true.

Example

form.getItem("textarea").events.on("beforeChange", function(value) {
    console.log("beforeChange", value);
    return true;
});

Change log: The event was added in v8.0

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