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JS 参考手册
JavaScript Object.assign() 方法
tryjsref_object_assign
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<!DOCTYPE html> <html> <body> <h1>JavaScript Object</h1> <h2>The Object.assign() Method</h2> <p id="demo"></p> <script> // Create Target Object const person1 = { firstName: "John", lastName: "Doe", age: 50, eyeColor: "blue" }; // Create Source Object const person2 = {firstName: "Anne",lastName: "Smith"}; // Assign Source to Target Object.assign(person1, person2); // Display Target let text = Object.entries(person1); document.getElementById("demo").innerHTML = text; </script> </body> </html>