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JavaScript Form - beforeChange Timepicker Event

fires before changing the value of a control

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

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

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

Example

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

The type of the value parameter depends on the applied valueFormat and timeFormat:

• If valueFormat: "string" and timeFormat:24 are specified, the string value will include just the hour and minutes: "00:39"
• If valueFormat: "string" and timeFormat:12 are specified, the string value will include hour, minutes, and am/pm identifiers: "06:00AM"
• If valueFormat: "timeObject" and timeFormat:24 are specified, the object value will contain key:value pairs for hours, minutes and their values: {hour: 0, minute: 39}
• If valueFormat: "timeObject" and timeFormat:12 are specified, the object value will contain key:value pairs for hours, minutes, am/pm identifiers and their values: {hour: 6, minute: 0, AM: true}

Change log: The event was added in v8.0

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