support for multiple outputFormat, like inputFormats about jstransformer HOT 11 CLOSED

both to accept only arrays (or plural array, singular only string?)

I would accept only strings for singular and plural only arrays.

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I'd actually opt to removing outputFormat entirely.

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I would accept only strings for singular and plural only arrays.

yea, exactly. I thought for something like this

var outputFormat = this._tr.outputFormat || this._tr.outputFormats;
var inputFormat = this._tr.inputFormat || this._tr.inputFormats || this.name;

outputFormat = Array.isArray(outputFormat) ? outputFormat : [outputFormat];
inputFormat = Array.isArray(inputFormat) ? inputFormat : [inputFormat];

this.outputFormat = this.outputFormats = outputFormat;
this.inputFormat = this.inputFormats = inputFormat;

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I'd actually opt to removing outputFormat entirely.

why?

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Remove outputFormat because it makes assumptions on the context of the application. As you demonstrated, the output can be changed based on the options passed to the Tranformer.

I've used Mustache to output CSS before, I've used ECO to output JavaScript. There is no way for us to determine what's expected for the output, so we should make no assumption in the matter.

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There is no way for us to determine what's expected for the output, so we should make no assumption in the matter

true

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hmm. good point.

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@jstransformers/owners one more use case
https://github.com/jstransformers/jstransformer-gray-matter - what should be inputFormats/outputFormat? text? it accept and output markdown, html, css, html and etc, common used for markdown, hbs, mustache and etc.

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and actually, all template engines or even just mustache-like engines can output just simple text not html, its based on the context of the application

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oh, yea, outputFormat is json, but what to be the inputFormats?

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The purpose of outputFormat is to define a default output format for a given transformer. I.e. If asked to transform a file with a given transformer and told nothing else, what file extension should I use for the output by default.

The purpose of inputFormats is to list the input file extensions that correspond to a given transformer. I.e. If I'm given a collection of files and a collection of transformers, which transformer should I use for which file.

These use cases should hopefully make it clear that there's not much use in having an array for outputFormat, but it does make sense to have an array of inputFormats

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