| 1 | var nullRefObject = {
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| 2 | current: null // A map of created ref objects to provide memoization.
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| 3 |
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| 4 | };
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| 5 | var refObjects = new WeakMap();
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| 6 | /** Creates a React ref object from existing DOM node. */
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| 7 |
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| 8 | var toRefObject = function toRefObject(node) {
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| 9 | // A "null" is not valid key for a WeakMap
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| 10 | if (node === null) {
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| 11 | return nullRefObject;
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| 12 | }
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| 13 |
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| 14 | if (refObjects.has(node)) {
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| 15 | return refObjects.get(node);
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| 16 | }
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| 17 |
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| 18 | var refObject = {
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| 19 | current: node
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| 20 | };
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| 21 | refObjects.set(node, refObject);
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| 22 | return refObject;
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| 23 | };
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| 24 |
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| 25 | export default toRefObject; |
| \ | No newline at end of file |