I got this error when updating to latest Tslint 5.7.0. It is said.
[tslint] Module chai is not listed as dependency in package.json (no-implicit-dependencies)
My chai package is definitely listed as dependency in my package.json. After looking at tslint documentation about no-implicit-dependencies, I found that
By default the rule looks at “dependencies” and “peerDependencies”. By adding the “dev” option the rule looks at “devDependencies” instead of “peerDependencies”. By adding the “optional” option the rule also looks at “optionalDependencies”.
So, because I listed Chai in dev dependencies, Tslint couldn’t find it using its default rule.
Set the rule in
tslint.json to either
"no-implicit-dependencies": [true, "dev"]
I chose to do the latter one.