es6:数据类型 symbol
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>数据类型 symbol</title> </head> <body> <script> const peter = Symbol('peter');//创建唯一标志符 const calssRoom = { [Symbol('a')]:{age:12}, [Symbol('b')]:{age:142}, [Symbol('b')]:{age:13} } const syms = Object.getOwnPropertySymbols(calssRoom).map(sym => calssRoom[sym]); console.log(syms) </script> </body> </html>
