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docs(symbol): edit symbol/Symbol.instanceOf

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ruanyf 2017-10-10 11:04:41 +08:00
parent 88248d97c3
commit 1ac918c804
1 changed files with 7 additions and 0 deletions
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docs/symbol.md
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@ -492,6 +492,13 @@ class Even {
} }
} }
// 等同于
const Even = {
[Symbol.hasInstance](obj) {
return Number(obj) % 2 === 0;
}
};
1 instanceof Even // false 1 instanceof Even // false
2 instanceof Even // true 2 instanceof Even // true
12345 instanceof Even // false 12345 instanceof Even // false