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blockly > Field > (constructor)
Field.(constructor)
Constructs a new instance of the Field class
Signature:
constructor(value: T | typeof Field.SKIP_SETUP, validator?: FieldValidator<T> | null, config?: FieldConfig);
Parameters
| Parameter |
Type |
Description |
| value |
T | typeof Field.SKIP_SETUP |
The initial value of the field. Also accepts Field.SKIP_SETUP if you wish to skip setup (only used by subclasses that want to handle configuration and setting the field value after their own constructors have run). |
| validator |
FieldValidator<T> | null |
(Optional) A function that is called to validate changes to the field's value. Takes in a value & returns a validated value, or null to abort the change. |
| config |
FieldConfig |
(Optional) A map of options used to configure the field. Refer to the individual field's documentation for a list of properties this parameter supports. |
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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-18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 `Field` constructor initializes a new field instance with an initial value, an optional validator, and an optional configuration."],["`Field.SKIP_SETUP` can be passed as the initial value to delay field setup for subclasses."],["A validator function can be provided to control and validate changes to the field's value."],["The optional `config` parameter allows for further customization of the field using specific properties."]]],["The `Field` class constructor initializes a new field instance. It accepts three parameters: `value`, `validator`, and `config`. `value` sets the field's initial value or `Field.SKIP_SETUP` for deferred setup. `validator` is an optional function to validate value changes, returning a validated value or null. `config`, also optional, is a map of field-specific configuration options. These parameters enable setting the initial state and defining constraints.\n"]]
