Suggest using template literals instead of string concatenation. (prefer-template)
建议使用模板字面量而非字符串连接 (prefer-template)
The --fix
option on the command line can automatically fix some of the problems reported by this rule.
命令行中的 --fix
选项可以自动修复一些该规则报告的问题。
In ES2015 (ES6), we can use template literals instead of string concatenation.
在 ES2015 (ES6) 中,我们可以使用模板而非字符串连接。
var str = "Hello, " + name + "!";
/*eslint-env es6*/
var str = `Hello, ${name}!`;
Rule Details
This rule is aimed to flag usage of +
operators with strings.
该规则旨在标记字符串间 +
操作符的使用。
Examples
Examples of incorrect code for this rule:
错误 代码示例:
/*eslint prefer-template: "error"*/
var str = "Hello, " + name + "!";
var str = "Time: " + (12 * 60 * 60 * 1000);
Examples of correct code for this rule:
正确 代码示例:
/*eslint prefer-template: "error"*/
/*eslint-env es6*/
var str = "Hello World!";
var str = `Hello, ${name}!`;
var str = `Time: ${12 * 60 * 60 * 1000}`;
// This is reported by `no-useless-concat`.
var str = "Hello, " + "World!";
When Not To Use It
This rule should not be used in ES3/5 environments.
此规则不应在 ES3/5 环境中使用。
In ES2015 (ES6) or later, if you don’t want to be notified about string concatenation, you can safely disable this rule.
在 ES2015 (ES6) 或以后的版本,如果你不希望收到关于字符串连接的通知,关闭此规则即可。
Related Rules
Version
This rule was introduced in ESLint 1.2.0.
该规则在 ESLint 1.2.0 中被引入。