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39 lines
1.2 KiB
39 lines
1.2 KiB
import * as React from 'react';
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/**
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* Iterates through children that are typically specified as `props.children`,
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* but only maps over children that are "valid elements".
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*
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* The mapFunction provided index will be normalised to the components mapped,
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* so an invalid component would not increase the index.
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*
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*/
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function map(children, func) {
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let index = 0;
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return React.Children.map(children, child => /*#__PURE__*/React.isValidElement(child) ? func(child, index++) : child);
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}
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/**
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* Iterates through children that are "valid elements".
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*
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* The provided forEachFunc(child, index) will be called for each
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* leaf child with the index reflecting the position relative to "valid components".
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*/
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function forEach(children, func) {
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let index = 0;
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React.Children.forEach(children, child => {
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if ( /*#__PURE__*/React.isValidElement(child)) func(child, index++);
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});
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}
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/**
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* Finds whether a component's `children` prop includes a React element of the
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* specified type.
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*/
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function hasChildOfType(children, type) {
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return React.Children.toArray(children).some(child => /*#__PURE__*/React.isValidElement(child) && child.type === type);
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}
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export { map, forEach, hasChildOfType }; |