To inject an embedded language into tagged template strings in JavaScript, you can define a custom template tag function that parses and processes the embedded language before returning the final string. This technique is often used for creating Domain-Specific Languages (DSLs) within JavaScript.

Here's an example of how you can inject an embedded language using tagged template strings:

javascript
// Custom template tag function to inject an embedded language function myTemplate(strings, ...values) { // Combine the strings and values into a single string let result = strings.reduce((acc, str, i) => { // Add the current string part acc += str; // Check if there is a corresponding value to inject if (i < values.length) { // Process the embedded language and inject the result acc += processEmbeddedLanguage(values[i]); } return acc; }, ''); return result; } // Example embedded language processing function function processEmbeddedLanguage(value) { // In this example, we'll just convert the value to uppercase return value.toUpperCase(); } // Usage of the custom template tag const name = 'John'; const age = 30; const result = myTemplate`Hello, my name is ${name} and I am ${age} years old.`; console.log(result); // Output: "Hello, my name is JOHN and I am 30 years old."

In the example above, we defined the myTemplate function as the custom template tag. It takes the strings and values as arguments, processes the embedded language (in this case, converting values to uppercase), and returns the final string.

When we use myTemplate as the tag for the template string, it processes the embedded language in each ${} expression and returns the modified string.

You can customize the processEmbeddedLanguage function to implement any logic you need to process the embedded language according to your specific requirements. This allows you to create powerful DSLs that can be used within JavaScript code.

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