| 1 | /**
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| 2 | * Safe chained function
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| 3 | *
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| 4 | * Will only create a new function if needed,
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| 5 | * otherwise will pass back existing functions or null.
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| 6 | *
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| 7 | * @returns {function|null}
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| 8 | */
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| 9 | export default function createChainedFunction() {
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| 10 | var args = [].slice.call(arguments, 0);
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| 11 |
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| 12 | if (args.length === 1) {
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| 13 | return args[0];
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| 14 | }
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| 15 |
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| 16 | return function chainedFunction() {
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| 17 | for (var i = 0; i < args.length; i++) {
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| 18 | if (args[i] && args[i].apply) {
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| 19 | args[i].apply(this, arguments);
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| 20 | }
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| 21 | }
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| 22 | };
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| 23 | } |
| \ | No newline at end of file |