Getting it to work in VSCode?

[Greggman]

I installed eslint-plugin-markdown in a project I'm editing with VScode and ran into issues

First I added the suggested overrides then I checked for errors in a markdown file, no errors show even thought I put intentional errors.

{
  ...
  "overrides": [
    {
      "files": [ "**/*.md" ],
      "parserOptions": {
        "ecmaFeatures": {
            "impliedStrict": true
        },
      },
      "rules": {
        "strict": "off"
      }
    }
  ]
}

I tried adding "markdown" to the eslint.validate setting as in in <projectfolder>/.vscode/settings.json

{
  "eslint.validate": [ "javascript", "html", "markdown" ]
}

But in that case VSCode seems be trying to lint the entire markdown file as JavaScript. I get errors on the entire file starting with the first line which is just normal text.

Any idea what I'm doing wrong?

[Brandon Mills]

I'm able to reproduce something like this with a configuration similar to yours, though I removed the overrides:

.vscode/settings.json

{
    "eslint.validate": ["javascript", "markdown"]
}

.eslintrc.js

module.exports = {
    plugins: [
    "markdown"
    ],
    extends: [
        "eslint:recommended"
    ],
    env: {
        browser: true
    }
}

In my case, lint rule failures are shown correctly:

But for some reason, syntax errors are all shown on the first line:

It got the column (7) correct, but ignored the line. Running ESLint outside the integration returns the correct line and column:

$ node_modules/.bin/eslint README.md

/Users/brandon/code/eslint/markdown-test/README.md
  5:7  error  Parsing error: Unexpected token !

✖ 1 problem (1 error, 0 warnings)

I don't get any errors in a file that shouldn't have any:

Does this match what you're seeing?

[Greggman]

Actually now that you mention it yes, that's what I'm seeing but it's not just syntax errors, it's any eslint error.

Here the only error is a style error, spaces after foo

with the space removed

[Brandon Mills]

I finally figured out what was causing this! Most ESLint rules pass both start and end locations, but parse errors only specify start locations. A bug was causing the processor to add endLine: NaN to those messages, which was understandably confusing VSCode. I opened #154 to fix this.

[Shahar "Dawn" Or]

😍