vue线上模式禁止查看源代码

if (process.env.NODE_ENV === "development") {
    }else {
      document.onkeydown = function () {
        if (window.event && window.event.keyCode == 123) {
          alert("F12被禁用");
          event.keyCode = 0;
          event.returnValue = false;
        }
        if (window.event && window.event.keyCode == 13) {
          window.event.keyCode = 505;
        }
        if (window.event && window.event.keyCode == 8) {
          alert(str + "\n请使用Del键进行字符的删除操作！");
          window.event.returnValue = false;
        }
      }
      document.oncontextmenu = function (event) {
        if (window.event) {
          event = window.event;
        }
        try {
          var the = event.srcElement;
          if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
            return false;
          }
          return true;
        } catch (e) {
          return false;
        }
      }
    }