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26 lines
680 B
26 lines
680 B
/**
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* Safe chained function
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*
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* Will only create a new function if needed,
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* otherwise will pass back existing functions or null.
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*
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* @param {function} functions to chain
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* @returns {function|null}
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*/
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function createChainedFunction(...funcs) {
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return funcs.filter(f => f != null).reduce((acc, f) => {
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if (typeof f !== 'function') {
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throw new Error('Invalid Argument Type, must only provide functions, undefined, or null.');
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}
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if (acc === null) return f;
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return function chainedFunction(...args) {
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// @ts-ignore
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acc.apply(this, args); // @ts-ignore
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f.apply(this, args);
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};
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}, null);
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}
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export default createChainedFunction; |