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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript Function bind()</h1>
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<p>在这个例子中，person 对象有一个 display 方法：</p>
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<p id="demo"></p>
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<script>
const person = {
  firstName:"Bill",
  lastName: "Gates",
  display: function() {
    let x = document.getElementById("demo");
    x.innerHTML = this.firstName + " " + this.lastName;
  }
}
​
person.display();
</script>
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</body>
</html>
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