blockly > FieldImage > doClassValidation_
FieldImage.doClassValidation_() method
Ensure that the input value (the source URL) is a string.
Signature:
protected doClassValidation_(newValue?: any): string | null;
Parameters
| Parameter |
Type |
Description |
| newValue |
any |
(Optional) The input value. |
Returns:
string | null
A string, or null if invalid.
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Last updated 2024-09-18 UTC.
[null,null,["Last updated 2024-09-18 UTC."],[[["`FieldImage.doClassValidation_` is a protected method used to validate the source URL provided to a FieldImage block."],["This method ensures the input value is a string and returns the validated URL or null if invalid."],["Developers working with custom Blockly blocks can leverage this method to ensure data integrity for image fields."]]],[]]
