为何Google在Node.js的require函数中使用模板字面量？

Great question! Let’s break down why you might see template literals (backticks) in a require() call even when there’s no string interpolation happening:

• Style Consistency：Many teams adopt a code style that favors template literals for all string declarations, regardless of whether they need interpolation. If the rest of the Google App Engine tutorial project uses backticks for strings, this line is just following that consistent pattern. It’s more about team conventions than a technical requirement here.

• Future-Proofing for Dynamic Paths：Template literals make it trivial to add dynamic values later. Suppose the tutorial’s test config path needed to change based on an environment variable (like process.env.NODE_ENV) down the line—using backticks now means you won’t have to rewrite the quote syntax when adding ${variable} interpolation later. It’s a small pre-emptive change to save time if requirements shift.

• Tooling/Linting Preferences：Some linting rules (like ESLint’s prefer-template) encourage using template literals over regular strings as a best practice, even for static values. If Google’s development workflow enforces these rules, the code would naturally use backticks here to pass lint checks.

• No Functional Difference (When Uninterpolated)：Importantly, when a template literal has no ${} placeholders, it behaves exactly like a single or double-quoted string. The JavaScript engine parses it into the same string value, so there’s no performance or functional impact—this is purely a stylistic or pragmatic choice.

内容的提问来源于stack exchange，提问作者nicholsonjf