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use hasOwnProperty for safe for in loop on defaults

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Andrew Joslin
2015-03-25 08:51:13 -06:00
parent 510f57a041
commit 6fb0743f7b
1 changed files with 1 additions and 1 deletions
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2
src/util.js
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@ -20,7 +20,7 @@ export function defaults(dest) {
for (let i = arguments.length - 1; i >= 1; i--) {
let source = arguments[i] || {};
for (let key in source) {
if (!dest.hasOwnProperty(key)) {
if (source.hasOwnProperty(key) && !dest.hasOwnProperty(key)) {
dest[key] = source[key];
}
}