export declare const lowercaseOnAttrReg: RegExp;
export declare function assertValidAttrValue(name: string, value: unknown): void;
export declare function _assert_class_toggles(classes: string, toggles: string[]): void;
export declare function assertValidTextValue(value: unknown): void;
export declare function assertValidLoopKey(key: unknown, seenKeys?: Set<unknown>): void;
export declare function assertValidList(value: unknown): void;
export declare function assertOptionalRangeNumber(name: string, value: unknown): void;
export declare function assertValidRangeBound(name: string, value: unknown): void;
export declare function assertValidAttrName(name: string): void;
export declare function _el_read_error(): void;
export declare function _hoist_read_error(): void;
export declare function _assert_hoist(value: unknown): void;
export declare function assertExclusiveAttrs(attrs: Record<string, unknown> | undefined, onError?: typeof throwErr, isSet?: (value: unknown) => unknown): void;
export declare function assertNoValueBindingOnCheckable(type: unknown, valueChange: unknown): void;
export declare function assertHandlerIsFunction(name: string, value: unknown): void;
export declare function assertValidTagName(tagName: string): void;
declare function throwErr(msg: string): void;
export {};