@antv/g2/lib/runtime/types/transform.d.ts

the Grammar of Graphics in Javascript

import { ColumnValue, NormalizedEncodeSpec } from './encode';
import { G2Library, G2Mark } from './options';
export type TransformContext = {
    library: G2Library;
};
export type TransformOptions = Record<string, any>;
export type TransformProps = Record<string, never>;
export type TransformComponent<O extends TransformOptions = TransformOptions> = {
    (options: O): Transform;
    props?: TransformProps;
};
export type Transform = (I: number[], mark: G2Mark, context: TransformContext) => [number[], G2Mark] | Promise<[number[], G2Mark]>;
export type TransformSpec = {
    type?: string | TransformComponent;
    [key: string]: any;
};
export type ColumnOf = (data: any, encode: NormalizedEncodeSpec) => ColumnValue;