thenlint
A lint for promises that checks for possible Promise.then usage errors.
usage
From the command-line:
thenlint <file.js> [<other.js> ...]
As a library:
report = require('thenlint')(fileContent, filename)
.map(function(item) { return item.toString(); }).join('\n');
example errors
Suggests ending the promise chain with .done()
// no return or var/assignment
promise.then(function(val) {
console.log(val);
}); // no errback
// no catch and no .done()Missing return statement in the middle of a return chain:
promise.then(function(val) {
// not returning from then
console.log(val);
// but trying to chain another
// call to then/spread
}).then(function(other) {
// anything
});non-errors
Adding catch instead of done is okay.
Not returning from within .then is okay as long as we're not trying
to chain another .then or .spread
// no return or assignment
promise.then(function(val) {
// no return...
console.log(val);
// but has an error handler
// and is not trying to chain a .then/.spread
}).catch(function(err) {
// anything
}); license
MIT