In JavaScript, you can't directly specify a variable's type in the same way you can in TypeScript. However, you can achieve a similar effect by using type checking and type conversion techniques.

To specify that a value can have multiple types but you know it will only have one in practice, you can use type checking and type conversion techniques to enforce the expected type at runtime. Here's an example:

        let value = "hello";
        if (typeof value === "string") {
          let length = value.length;
          console.log(length); // Output: 5
        } else {
          console.log("Expected a string value.");
        }

In this example, the value variable is assigned a string value. We can check the type of value using the typeof operator, and then conditionally access the length property only if value is a string. If value were anything else, such as a number or an object, the code would skip the if block and log an error message instead.

This technique isn't as powerful or expressive as TypeScript's type system, but it can still help catch certain types of bugs and make your code more reliable. If you need more advanced type checking or type conversion capabilities, you can consider using a library or framework that provides them, such as lodash or ramda.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence