1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
    6.     <title>Document</title>
    7. </head>
    8. <body>
    9.     <script>
    10.          var arr = [
    11.              {name:"html",value:"12px"},
    12.              {name:"css",value:"13px"},
    13.              {name:"vue",value:"11px"}
    14.          ]
    15.          var res = []
    16.          for(var key in arr){
    17.              arr[key].value = parseInt(arr[key].value)*2;
    18.              res.push(arr[key]);
    19.          }
    20.          console.log(res);
    21.     </script>
    22. </body>
    23. </html>

    1.PNG