1.Nested block is redundant no-lone-blocks
?
2.Unexpected string concatenation of literals no-useless-concat
拼接字符串报错 "Unexpected string concatenation"
错误原因:ESLint推荐用ES6方法来拼接字符串,而不能使用加号。
解决办法:拼接字符串使用形如:
`字符串字符串字符串${变量名}字符串字符串字符串${返回字符串的方法}字符串字符串`的写法。
3.series not exists. Legend data should be same with series name or data name.
4.React Hook useEffect has a missing dependency: 'fetchBusinesses'. Either include it or remove the dependency array react-hooks/exhaustive-deps (同:7.React Hook useEffect has a missing dependency: 'getList'. Either include it or remove the dependency array)
这不是JS / React错误,而是eslint警告。它告诉你钩子依赖于函数fetchBusinesses
,所以你应该把它作为依赖传递。
1.useEffect(() => { fetchBusinesses(); }, [fetchBusinesses]); 如果fetchBusinessess在运行中没有组件,那将不会真正改变任何事情,但警告将消失。 2.useEffect(() => { // other code ... // eslint-disable-next-line react-hooks/exhaustive-deps }, [])
参考文章:https://www.soinside.com/question/yyxQ6i8PKsVyaS3teSftxH
5.Assign object to a variable before exporting as module default import/no-anonymous-default-export
原代码: export default { errorToast, successToast, }; 解决方案: const user = { user: {} } export default user;
原因:let reg = /^([a-zA-Z]|[0-9])(w\-)+@[a-zA-Z0-9]+.([a-zA-Z]{2,4})$/ 改为:let reg = /^([a-zA-Z]|[0-9])(w)+@[a-zA-Z0-9]+.([a-zA-Z]{2,4})$/
7.Imported JSX component RenderPack_Expense must be in PascalCase or SCREAMING_SNAKE_CASE react/jsx-pascal-case
解决方案:React发现了带下划线的组件命名,将带下划线的组件命名改为驼峰命名即可
8.The href attribute is required for an anchor to be keyboard accessible.Provide a valid, navigable address as the href value.If you cannot provide an href, but still need the element to resemble a link, use a button and change it with appropriate styles.Learn more: https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/anchor-is-valid.md jsx-a11y/anchor-is-valid
添加配置: 在package.json文件中添加如下代码 "eslintConfig": { "extends": "react-app", "rules":{ "jsx-a11y/anchor-is-valid":"off" } } 修改代码为: <a href="">{text}</a>
参考文章:https://blog.csdn.net/weixin_34029680/article/details/91434946
9.warning Array.prototype.map() expects a return value from arrow function array-callback-return
map循环,报警告Expected to return a value in arrow function
意思是缺少return返回值
解决方案: 使用forEach代替map,因为ESlint报这个警告是因为map, filter , reduce 需要返回值 也可以使用map,在react中用jsx的方式,直接把{}改成()
10.Nested block is redundant no-lone-blocks
在 ES6 之前的 JavaScript 中,由花括号分隔的独立代码块不会创建新的作用域,也没有用处。
在 ES6 中,如果块级绑定(let和const),类声明或函数声明(以严格模式)存在,则代码块可能会创建新范围。在这些情况下块不被认为是多余的。
此规则旨在消除脚本顶层或其他块中不必要的和可能混淆的块。
此规则的错误代码示例:
/*eslint no-lone-blocks: "error"*/
{}
if (foo) {
bar();
{
baz();
}
}
function bar() {
{
baz();
}
}
{
function foo() {}
}
{
aLabel: {
}
}
使用 es6 环境的此规则的正确代码示例:
/*eslint no-lone-blocks: "error"*/
/*eslint-env es6*/
while (foo) {
bar();
}
if (foo) {
if (bar) {
baz();
}
}
function bar() {
baz();
}
{
let x = 1;
}
{
const y = 1;
}
{
class Foo {}
}
aLabel: {
}
通过 ESLint 配置或代码中的指令使用es6环境和严格模式通过此规则的正确代码示例:"parserOptions": { "sourceType": "module" }"use strict"
/*eslint no-lone-blocks: "error"*/
/*eslint-env es6*/
"use strict";
{
function foo() {}
}
11.index.js:1 Warning: Instance created by `useForm` is not connected to any Form element. Forget to pass `form` prop?
原因:官方文档说:这是因为你在调用 form 方法时,Modal 还未初始化导致 form 没有关联任何 Form 组件。你可以通过给 Modal 设置 forceRender 将其预渲染。
就是直接在Form标签里面添加form={form},确实解决问题这个报错的问题了。
12.Warning: Same `value` exist in the tree: undefined
?
13.index.js:1 Warning: Each child in a list should have a unique “key“ prop.Check the render method of 'Body'. See httpes://reactjs.or/link/warning-keys for more information. at BodyRow
分页,报错解决方式如图:(rowKey为每一项的唯一字段名)
在table组件里面写上rowKey属性
rowkey = {record => record.id}
id 为表格数据中已有的字段
14.Warning: Cannot update a component (`ReportComponents`) while rendering a different component (`BodyRow`). To locate the bad setState() call inside `BodyRow`, follow the stack trace as described in