[Text formating at Js]

sample.js

//Source https://stackoverflow.com/questions/7975005/format-a-javascript-string-using-placeholders-and-an-object-of-substitutions

const stringWithPlaceholders = 'My Name is {name} and my age is {age}.';

    const replacements = {
        name: 'Mike',
        age: '',
    };

    function formate(old_string,replacement_dict) {
        return old_string.replace(
            /{(\w+)}/g,
            (placeholderWithDelimiters, placeholderWithoutDelimiters) =>
                replacement_dict.hasOwnProperty(placeholderWithoutDelimiters) ?
                    replacement_dict[placeholderWithoutDelimiters] : placeholderWithDelimiters
        )
    }