Can ES6 Template Literals Be Reusable at Runtime?

Debunking the Limitations of ES6 Template Literals: Achieving Reusability at Runtime

While ES6 template literals provide enhanced string manipulation capabilities, one common misconception is that they are immutable and cannot be reused or substituted dynamically at runtime. However, with a clever approach involving the Function constructor, it is possible to create reusable template literals that can be evaluated and interpolated on the fly.

Reusable Template Literals Demystified

The key to reusable template literals lies in treating them as an intermediate form. By converting the template string into a Function object, we effectively create a template function that can be invoked with dynamic data to generate the final string.

<code class="javascript">const templateString = `\`This is
my ${expletive} reusable
template!\``;

const templateFunction = new Function(`return \`${templateString}\``);

let expletive = 'curious';
console.log(templateFunction.call({ expletive }));</code>

This allows us to substitute the value of the expletive variable at runtime, effectively making the template reusable and dynamic.

Enhancing Reusability with a Helper Function

To further simplify the process, we can introduce a helper function that automates the conversion of a template string into a reusable template function:

<code class="javascript">function reusableTemplate(templateString) {
  return `return \`${templateString.replace('{','$${')}\``;
}

const template = reusableTemplate(`This is
my {expletive} reusable
template!`);

console.log(new Function(template)({ expletive: 'AMAZING' }));</code>

This helper function makes it effortless to define and use reusable templates with dynamic substitutions.

Benefits and Limitations

Reusable template literals offer several benefits:

• Interpolation of dynamic data at runtime
• Facilitates template reuse across different parts of the codebase
• Promotes code clarity and maintainability
• Supports advanced templating features like template tags

However, they also come with some limitations:

• Template tags require additional considerations when using function-based templates
• Inline JavaScript logic is not supported due to late interpolation

Overall, ES6 template literals, when extended with the Function constructor, unlock a new level of versatility and reusability, demonstrating that they are not merely static strings but rather powerful tools for dynamic string manipulation and template generation.

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