Why Are My JavaScript Variables Displaying as Literal Strings Instead of Values?

Template Literals in JavaScript: Using Backticks vs. Straight Quotes

In JavaScript, template literals allow for the embedding of variables within strings. However, if you encounter an issue where variables are being displayed as literal strings instead of values, the problem lies in the use of straight quotation marks instead of backticks.

Understanding Backticks

Template literals in JavaScript are defined using backticks (`) rather than straight quotation marks ('). Backticks are found on the keyboard next to the number 1 key.

Example

Consider the following code, where template literals are intended to be used:

const categoryName = "name";
const categoryElements = "element";
console.log('categoryName: ${this.categoryName}\ncategoryElements: ${this.categoryElements} ');

However, this code will output the following:

${this.categoryName}
categoryElements: ${this.categoryElements}

In this case, the template literals are not working because straight quotation marks are being used. The correct code using backticks would be:

console.log(`categoryName: ${this.categoryName}\ncategoryElements: ${categoryElements} `);

Output:

categoryName: name
categoryElements: element

Conclusion

Remember, JavaScript template literals require backticks (`) for variable substitution, whereas straight quotation marks will display the literal variable names. By using backticks correctly, you can effectively embed variable values within strings and enhance the readability and flexibility of your code.

The above is the detailed content of Why Are My JavaScript Variables Displaying as Literal Strings Instead of Values?. For more information, please follow other related articles on the PHP Chinese website!