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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. |
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Last updated 2024-09-18 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-18 UTC."],[],["The `BlockChange` class constructor creates a new instance to track changes within a block. It accepts optional parameters defining the affected block, the specific element changed (e.g., 'field', 'comment'), the element's name, the old value, and the new value. The block parameter specifies which block changed, while element and name identify what part of that block was modified. `opt_oldValue` and `opt_newValue` store the previous and current values.\n"]]
