Concatenating Strings with Variables in JavaScript
In the provided code, the goal is to combine a string ('horseThumb') with a numeric variable 'id' to form a single string. This can be achieved through string concatenation.
One method, as mentioned in the question, is string interpolation using ${variable} syntax. However, the questioner's code appears to have encountered a problem using this approach.
Fixing Template Literal Issues
Before debugging the template literal issue, it's crucial to ensure that the 'id' argument is being passed correctly and that the element with the corresponding ID exists. Adding console statements for these checks is recommended.
If the element exists but the template literal still fails, check for potential syntax errors. Backticks (`) should be used to enclose the template string, and the ${variable} interpolation must be within those backticks.
Alternative Concatenation Methods
Besides string interpolation, JavaScript provides other concatenation methods:
Example Using Alternative Methods
Using string addition, the code would become:
function AddBorder(id) { var result = 'horseThumb' + id; document.getElementById(result).className = 'hand positionLeft'; }
Using the concat() method:
function AddBorder(id) { var result = 'horseThumb'.concat(id); document.getElementById(result).className = 'hand positionLeft'; }
Additional Notes
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