ESlint 在函数中的第一条语句之前是否有关于空行的规则？

Question

Due ESLint I found a rule newline-before-return about empty line before return statements. But did not see a rule about empty line before the first statement in function. Fe:

function (a) {

    var b = +a;
}

Has ESlint a rule about this? If it has, what is the name this rule? Thanks

Answer 1

The padded-blocks rule allows you to require newlines at the start and end of blocks, including function bodies. In addition to function bodies, it also covers the bodies of if statements, for and while loops, and other block-like structures, which you may or may not want.

Try pasting the following code in the demo to see if it works for you:

/* eslint padded-blocks: "error" */
function foo(bar) {

    if (bar) {

        foo();

    }

}

If you only want to check function bodies, you could follow @Dhananjay's suggestion and edit the rule's source code into your own custom rule.

Answer 2

我不认为有这样的一个基于规则的名单上盒可用了可用规则你可以尝试添加自定义规则在本次检查的解释这里

Answer 3

Such rule is implemented in the HAPI ESLint plugin , installed this way:

npm install @hapi/eslint-plugin-hapi --save-dev
// Add in your `.eslintrc`
{
  plugins: [
    '@hapi/eslint-plugin-hapi',
  ],
  rules: {
    '@hapi/hapi/scope-start': ['error'],
  },
};

}

Or you may use it as part of HAPI ESLint config .
Mind, that Airbnb style guide recommends against padding blocks.