dynamic operator []=(
property,
value
)

Sets the value associated with property on the proxied JavaScript object.

The type of property must be either String or num.

Source

/**
 * Sets the value associated with [property] on the proxied JavaScript
 * object.
 *
 * The type of [property] must be either [String] or [num].
 */
operator []=(property, value) native "JsObject_[]=";