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JavaScript toString() 方法
tryjs_object_tostring
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<!DOCTYPE html> <html> <body> <h1>JavaScript Object</h1> <h2>The toString() Method</h2> <p>The toString() method of an object returns "[object Object]":</p> <p id="demo"></p> <script> let person = { firstname: "John", lastname: "Doe", } let text = person.toString(); document.getElementById("demo").innerHTML = text; </script> </body> </html>