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JavaScript bind() 函数方法
tryjs_function_bind2
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<!DOCTYPE html> <html> <body> <h1>JavaScript Functions</h1> <h2>The bind() Method</h2> <p>This example will display a person name after 3 seconds:</p> <p id="demo"></p> <script> const person = { firstName:"John", lastName: "Doe", display: function() { let x = document.getElementById("demo"); x.innerHTML = this.firstName + " " + this.lastName; } } let display = person.display.bind(person); setTimeout(display, 3000); </script> </body> </html>