Missing converter: triple-equals

[JoshuaKGoldberg]

💥 Missing Converter

• tslint-to-eslint-config version: 1.2.0
• typescript-eslint version: 2.3.2

TSLint Rule Name

triple-equals

[JoshuaKGoldberg]

The issue here is that this package doesn't know how to convert the TSLint rule into the equivalent ESLint rule. Accepting PRs to add in a converter! 🙌

docs/Development.md has a root overview for how to get started. Within that, docs/Architecture.md#rule-converters talks about how these converters operate. Check the typescript-eslint roadmap to see suggestions on equivalent ESLint rules to convert to.

See #189 for an example of a simple rule converter that was recently added in.

[Mouzourides]

Hey I'd like to give this a go

[Mouzourides]

The TSLint options for the triple-equals rule are: [ "allow-null-check", "allow-undefined-check" ].
The ESLint options for eqeqeq rule are: ["smart", "always"]

The "allow-null-check" option best maps to the ESLint "smart "option. It also has the additional functionality of allowing comparing two literal values and evaluating the value of typeof. I have added this information in the "notice" array if the user has selected the "allow-null-check" option.
There is a way to only ignore null comparisons by selecting the ESLint "always" option with additional configuration e.g. ["error", "always", {"null": "ignore"}] however I believe it's encouraged to use the "smart" option and so I have implemented that.

The "allow-undefined-check" option does not have a direct mapping to ESLint. I have added this to the "notice" array and selected the "smart" option as I believe it to be the closest.

Not supplying an argument for TSLint defaults to the ESLint "always" option.