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<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>函数参数默认值</title>
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<body>
<script>
//ES6 允许给函数参数赋值初始值
//1. 形参初始值 具有默认值的参数, 一般位置要靠后(潜规则)
// function add(a,c=10,b) {
// return a + b + c;
// }
// let result = add(1,2);
// console.log(result);
//2. 与解构赋值结合
function connect({host="127.0.0.1", username,password, port}){
console.log(host)
console.log(username)
console.log(password)
console.log(port)
}
connect({
host: 'atguigu.com',
username: 'root',
password: 'root',
port: 3306
})
</script>
</body>
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