packages/website/ts/pages/documentation/custom_enum.tsx


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import * as _ from 'lodash';
import * as React from 'react';
import {utils} from 'ts/utils/utils';
import {CustomType} from 'ts/types';

const STRING_ENUM_CODE_PREFIX = ' strEnum(';

interface CustomEnumProps {
    type: CustomType;
}

// This component renders custom string enums that was a work-around for versions of
// TypeScript <2.4.0 that did not support them natively. We keep it around to support
// older versions of 0x.js <0.9.0
export function CustomEnum(props: CustomEnumProps) {
    const type = props.type;
    if (!_.startsWith(type.defaultValue, STRING_ENUM_CODE_PREFIX)) {
        utils.consoleLog('We do not yet support `Variable` types that are not strEnums');
        return null;
    }
    // Remove the prefix and postfix, leaving only the strEnum values without quotes.
    const enumValues = type.defaultValue.slice(10, -3).replace(/'/g, '');
    return (
        <span>
            {`{`}
                {'\t'}{enumValues}
                <br />
            {`}`}
        </span>
    );
}