tagged-templates

This question already has an answer here: Backticks calling a function 2 answers According to MDN, Tagged template literals can be used as follows: var a = 5; var b = 10; function tag(strings, ...values) { alert(strings[0]); // "Hello " alert(strings[1]); // " world " alert(values[0]); // 15 alert(values[1]); // 50 return "Bazinga!"; } tag `Hello ${ a + b } world ${ a * b }`; // "Bazinga!" In the example above, the function tag is called without using parentheses. I expected it should be called like tag(`Hello`) , but that passes the string resulting from the template literal as the argument

After studying this Es6 tag template example: var yo = func`${x} + ${y}\n= ${x + y}`; one@public-node ~/es6 $ 6to5 tag.js "use strict"; var _taggedTemplateLiteral = function (strings, raw) { return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }; var yo = func(_taggedTemplateLiteral(["", " + ", "\n= ", ""], ["", " + ", "\\n= ", ""]), x, y, x + y); I see what is returned is var yo = func(strings, raw, x, y, x + y); I understand the basics about the string literals and the x y values being inserted. What I don't understand is...when is strings used

I understand the syntax of ES6 tagged templates . What I don't see is the practical usability. When is it better than passing an object parameter, like the settings in jQuery's AJAX ? $.ajax('url', { /*this guy here*/ }) Right now I only see the tricky syntax but I don't see why I would need/use it. I also found that the TypeScript team chose to implement it (in 1.5) before other important features. What is the concept behind tagged string templates? You can use tagged templates to build APIs that are more expressive than regular function calls. For example, I'm working on a proof-of-concept