In dvajs, ie10 class does not report errors, but use charts such as bizchart to report errors.

to solve The component appears to have a render method, but doesn"t extend React.Component. dva issues 1717
add

to index.js
  https://github.com/umijs/umi/., not knowing how to update 
using npm install babel@7.0.0-beta.48 or 53 prompts that the package cannot be found

Nov.02,2021

switch umi, from dva and comment
/ / Object.setPrototypeOf = require ('setprototypeof') in umi-plugin-polyfills/lib/ie9.js;
dva issue 1949

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bdd584-31369.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bdd584-31369.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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