blockly > Events > BlockChange > oldValue
Events.BlockChange.oldValue property
The original value of the element.
Signature:
oldValue: unknown;
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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-18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 `oldValue` property within the `BlockChange` event class stores the original value of an element before it was modified. This property is part of the Blockly event system, specifically within the `Events.BlockChange` context. The data type of `oldValue` is `unknown`, indicating it can hold various types of data, dependent upon the element's nature. It provides information on the element's state prior to the change.\n"]]