tslint.js

// npm install tslint-immutable --save-dev
// tslint.json
{
  "extends": ["tslint-immutable"],
  "rules": {

    // Recommended built-in rules
    "no-var-keyword": true,
    "no-parameter-reassignment": true,
    "typedef": [true, "call-signature"],

    // Immutability rules
    "readonly-keyword": true,
    "readonly-array": true,
    "no-let": true,
    "no-object-mutation": true,
    "no-delete": true,
    "no-method-signature": true,

    // Functional style rules
    "no-this": true,
    "no-class": true,
    "no-mixed-interface": true,
    "no-expression-statement": true,
    "no-if-statement": true

  }
}