代码示例：（标识：js_function_bind_borrow）
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Function bind()</h1>
<p>此例创建 2 个对象（person 和 member）。</p>
<p>member 对象借用了 person 的 fullname 方法：</p>
<p id="demo"></p>
<script>
const person = {
firstName:"Bill",
lastName: "Gates",
fullName: function() {
return this.firstName + " " + this.lastName;
}
}
const member = {
firstName:"Steve",
lastName: "Jobs",
}
let fullName = person.fullName.bind(member);
document.getElementById("demo").innerHTML = fullName();
</script>
</body>
</html>
