blockly > Events > BlockChange > (constructor)
Events.BlockChange.(constructor)
Constructs a new instance of the BlockChange class
Signature:
constructor(opt_block?: Block, opt_element?: string, opt_name?: string | null, opt_oldValue?: unknown, opt_newValue?: unknown);
Parameters
| Parameter | Type | Description |
|---|---|---|
| opt_block | Block | (Optional) The changed block. Undefined for a blank event. |
| opt_element | string | (Optional) One of 'field', 'comment', 'disabled', etc. |
| opt_name | string | null | (Optional) Name of input or field affected, or null. |
| opt_oldValue | unknown | (Optional) Previous value of element. |
| opt_newValue | unknown | (Optional) New value of element. |