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How Can a Regular String Be Converted to a Template Literal Without `eval` or `new Function`?
How Can a Regular String Be Converted to a Template Literal Without `eval` or `new Function`?
Nov 22, 2024 am 10:05 AM
Transforming Simple Strings into Template Strings
Can a regular string be effortlessly transformed into a template string? Consider the following example:
let a = "b:$";
How can we convert this into a template string dynamically, without resorting to eval, new Function, or other dynamic code generation techniques?
let b = 10; console.log(a.template()); // b:10
An ES6 Solution
In modern JavaScript, we can leverage ES6 features to achieve this conversion:
String.prototype.interpolate = function(params) {
const names = Object.keys(params);
const vals = Object.values(params);
return new Function(...names, `return \`${this}\`;`)(...vals);
};
const template = 'Example text: ${text}';
const result = template.interpolate({
text: 'Foo Boo'
});
console.log(result); // 'Example text: Foo Boo'
This method utilizes the String.prototype.interpolate function that accepts an object of parameters. It dynamically constructs a new function using the object's keys and values, then executes it to return the interpolated string.
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