相同的属性名,属性值不同也会合并在一起,代码如下
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <script> let obj={a:3,b:4} obj={...obj,b:5} obj={...obj,c:4} console.log(obj); </script> </body> </html>