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Why Do My JavaScript Template Literals Display Variable Names Instead of Values?
Why Do My JavaScript Template Literals Display Variable Names Instead of Values?
Dec 08, 2024 am 05:56 AM
Template Literals in JavaScript: Backticks Required
Template literals in JavaScript, denoted by ${} placeholders within strings, offer a convenient way to embed expressions. However, encountering display issues with template literals using single quotes (') instead of backticks (`) is a common oversight.
Problem Description
When using single quotes, the literal variable names are printed instead of their values. For instance:
console.log('categoryName: ${this.categoryName}\ncategoryElements: ${this.categoryElements} ');
Output:
${this.categoryName}
categoryElements: ${this.categoryElements}
Solution
JavaScript template literals require backticks, not straight quotation marks.
Backticks are the characters next to the '1' key on a QWERTY keyboard. Using them instead of single quotes creates a template literal, which can then house ${} placeholders to evaluate expressions:
categoryName = "name";
categoryElements = "element";
console.log(`categoryName: ${this.categoryName}\ncategoryElements: ${categoryElements} `);
Output:
categoryName: name categoryElements: element
Additional Information
Backticks are frequently used in various programming languages but may be novel to JavaScript developers. Refer to the following resource for further details:
- [Usage of the Backtick Character in JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/template_literals)
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