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<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
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<title>js自动检测是否使用new关键字创建函数</title>
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<script>
/**
* @dec js 自动检测是否使用new关键字创建函数
* @param name
* @param age
* @returns {Person}
* @constructor
*/
function Person (name, age) {
if (this instanceof Person) {
this.name = name;
this.age = age;
} else {
return new Person(name, age);
}
}
const liubei = Person('liubei', 45);
console.log(liubei.age, liubei.name);// 45 "liubei"
const zhangfei = new Person('zhangfei', 89);
console.log(zhangfei.age, zhangfei.name);// 89 "zhangfei"
</script>
</body>
</html>