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blockly > Block > onchange
Block.onchange property
An optional callback method to use whenever the block's parent workspace changes. This is usually only called from the constructor, the block type initializer function, or an extension initializer function.
Signature:
onchange?: ((p1: Abstract) => void) | null;
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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-18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."],[[["`onchange` is an optional callback method triggered when a block's parent workspace changes."],["This method is typically called during block creation or initialization, not during regular operation."],["`onchange` accepts a function with one `Abstract` type parameter, which likely represents the workspace or a related event object."],["Users can utilize `onchange` to implement custom logic in response to workspace modifications affecting a specific block."]]],["The `Block.onchange` property is an optional callback function triggered when a block's parent workspace is modified. It's typically set within the block's constructor, type initializer, or extension initializer. This callback, accepting an `Abstract` parameter, allows for custom actions in response to workspace changes. It can also be set to `null`.\n"]]
