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<!DOCTYPE html> <html> <body> <h1>使用 <em>replacer</em> 函数</h1> <p>大写“city”的值：</p> <p id="demo"></p> <script> var obj = { "name":"John", "age":"39", "city":"New York"}; var text = JSON.stringify(obj, function (key, value) { if (key == "city") { return value.toUpperCase(); } else { return value; } }); document.getElementById("demo").innerHTML = text; </script> </body> </html>