Properties referenced on this inside of a class should be defined ahead of time.
npm install eslint-plugin-no-undef-class-thisno-undef-class-this, described here.
$ npm i eslint --save-dev
`
Next, install eslint-plugin-no-undef-class-this:
`
$ npm install eslint-plugin-no-undef-class-this --save-dev
`
Note: If you installed ESLint globally (using the -g flag) then you must also install eslint-plugin-no-undef-class-this globally.
Usage
Add no-undef-class-this to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:
`json
{
"plugins": [
"no-undef-class-this"
]
}
`
Then configure the rules you want to use under the rules section.
`json
{
"rules": {
"no-undef-class-this/no-undef-class-this": "error"
}
}
``