Template does not escape ES template literals

[goncalo-matos]

About version 4.17.11

although the template function allows using ES template literals it does not allow it to be escaped. Case in point:

With lodash's template:

let lodashTemplate = _.template('\${foo}')({foo: 'bar'}); 
console.log(lodashTemplate); // prints 'bar'

With template literals:

let foo = 'bar';
let esTemplate = `\${foo}`;
console.log(esTemplate); // prints '${foo}'

Is this a bug or does template not allow to escape template literals (as it can be disabled with a custom interpolator function)?

[goncalo-matos]

By reading the code, it seems to me that it only uses the es template regex if no interpolation is given (as per the docs as well), but it does not have any kind of logic for the escape regex (it always uses the one provided/the default).

lodash/lodash.js

Lines 14788 to 14793 in 39a7eae

	var reDelimiters = RegExp(
	(options.escape || reNoMatch).source + '|' +
	interpolate.source + '|' +
	(interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
	(options.evaluate || reNoMatch).source + '|$'
	, 'g');

Wouldn't it be the same to make the default regex one that includes both the es delimiter (${}) and the <% delimiters? By using the same logic the escape template can easily get both escape characters as well.

[jdalton]

Hi @Atekon!

Our template method is pretty simple you can customize the regexes it uses to match delimiters though as _.templateSettings or options to the _.template method.

[lock]

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