Multiline strings that don't break indentation

Question

According to this esdiscuss discussion, it is possible in ECMAScript 6 to define multiline strings without having to place subsequent lines of the string at the very beginni

Answer 1

How to define this dontIndent thing in order to remove the whitespace used for indentation?

I suppose something like this should suffice for many cases (including the OP):

function dontIndent(str){
  return ('' + str).replace(/(\n)\s+/g, '$1');
}

Demo code in this snippet:

var a = dontIndent
        `This is a template string.
         Even though each line is indented to keep the
         code neat and tidy, the white space used to indent
         is not in the resulting string`;

console.log(a);
         
function dontIndent(str){
  return ('' + str).replace(/(\n)\s+/g, '$1');
}

Explanation

JavaScript template literals can be called with a tag, which in this example is dontIndent. Tags are defined as functions, and are called with the template literal as an argument, so we define a dontIndent() function. The template literal is passed as an argument in an array, so we use the expression ('' + str) to cast the array content to a string. Then, we can use a regular expression like /(\n)\s+/g to .replace() all occurrences of line breaks followed by white space with only the line break to achieve the aim of the OP.