blockly > Events > BlockChange > (constructor)


Constructs a new instance of the BlockChange class


constructor(opt_block?: Block, opt_element?: string, opt_name?: string | null, opt_oldValue?: unknown, opt_newValue?: unknown);


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.