interview - engineer

clean code principals

• “If it isn’t tested, it’s broken”
• Choose meaningful names
• Classes and functions should be small and obey the Single Responsibility Principle (SRP)
• Functions should have no side effects

ESLint

原理

ESLint 使用 espree 来解析我们的 JS 语句，来生成抽象语法树 AST

根据 rules 定义

// { `no-debugger`: 'error }
module.exports = {
  meta: {
    type: "problem",
    docs: {
      description: "disallow the use of `debugger`",
      category: "Possible Errors",
      recommended: true,
      url: "https://eslint.org/docs/rules/no-debugger"
    },
    fixable: null,
    schema: [],
    messages: {
      unexpected: "Unexpected 'debugger' statement."
    }
  },
  create(context) {
    return {
      DebuggerStatement(node) {
        context.report({
          node,
          messageId: "unexpected"
        });
      }
    };
  }
};

extends 写法

{
  extends: [
    'eslint-config-airbnb-base',
    './rules/react',
    './rules/react-a11y',
  ].map(require.resolve),
  // OR
  extends: "airbnb"
};

API 测试

Rest

• https://jikan.moe/ most active online anime + manga community and database” — MyAnimeList