Nodejs,Istanbul 单元测试覆盖率，浏览器版本报告没有出现百分比,

Handlebars: Access has been denied to resolve the property "statements" because it is not an "own property" of its parent.
You can add a runtime option to disable the check or this warning:
See https://handlebarsjs.com/api-reference/runtime-options.html#options-to-control-prototype-access for details
Handlebars: Access has been denied to resolve the property "branches" because it is not an "own property" of its parent.
You can add a runtime option to disable the check or this warning:
See https://handlebarsjs.com/api-reference/runtime-options.html#options-to-control-prototype-access for details
Handlebars: Access has been denied to resolve the property "functions" because it is not an "own property" of its parent.
You can add a runtime option to disable the check or this warning:
See https://handlebarsjs.com/api-reference/runtime-options.html#options-to-control-prototype-access for details
Handlebars: Access has been denied to resolve the property "lines" because it is not an "own property" of its parent.
You can add a runtime option to disable the check or this warning:
See https://handlebarsjs.com/api-reference/runtime-options.html#options-to-control-prototype-access for details

题目中的问题从Hadnlebars官方文档得到了答案，文档

下面是问题复现和解决步骤；

---

handlebars@4.7.6 error 复现：

使用 handlebars@4.7.6 的时候：

• 运行命令：

$ npm run coverage 

• 问题截图：
  

• 浏览器报告截图：
  

• handlebars@4.7.6 版本信息截图：
  

---

使用 handlebars@4.5.3 的时候：

• 命令
  首先 命令 or 手动删除 handlebars
  然后运行👇命令

$ npm install handlebars@4.5.3

+ handlebars@4.5.3
added 3 packages from 1 contributor, updated 1 package and audited 514 packages in 6s

30 packages are looking for funding
  run `npm fund` for details

found 2 low severity vulnerabilities
  run `npm audit fix` to fix them, or `npm audit` for details

开始单元测试命令：

$ npm run coverage

• 终端截图：
  

• 浏览器报告截图：
  

• handlebars@4.5.3 版本信息截图：