How Can I Convert a Regular String to a Template Literal in ES6 JavaScript Without Using `eval` or `new Function`?

Converting a String to a Template String with ES6

In JavaScript, template strings allow you to embed expressions and variables directly into strings, providing a concise and readable syntax. However, what if you want to create a template string from an existing non-template string? This question explores the possibility of achieving this conversion without using dynamic code generation techniques like eval or new Function.

The provided solution leverages ES6's string interpolation capabilities with a custom interpolate function. This function takes an object containing the template parameters and dynamically generates a template string using a JavaScript template literal.

Here's how the solution works:

String.prototype.interpolate = function(params) {
  const names = Object.keys(params);
  const vals = Object.values(params);
  return new Function(...names, `return \`${this}\`;`)(...vals);
}

The interpolate function is added as a custom prototype method to the String object. It accepts an object of key-value pairs representing the template parameters.

const template = 'Example text: ${text}';
const result = template.interpolate({
  text: 'Foo Boo'
});

Here, we apply the interpolate function to our template string, passing an object with the parameter text set to 'Foo Boo'. The function creates a template string by utilizing a JavaScript template literal with placeholders for the parameter values.

console.log(result);

Finally, we log the result to the console, which should output:

Example text: Foo Boo

This solution allows you to convert an ordinary string into a template string dynamically, enabling you to take advantage of the expressiveness and readability offered by template strings in your JavaScript code.

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