no-useless-escape
Disallow unnecessary escape characters
✅ Recommended
The "extends": "eslint:recommended"
property in a configuration file enables this rule
💡 hasSuggestions
Some problems reported by this rule are manually fixable by editor suggestions
在字符串、模板字面和正则表达式中省略非特殊字符不会有任何影响,如下例所示:
let foo = "hol\a"; // > foo = "hola"
let bar = `${foo}\!`; // > bar = "hola!"
let baz = /\:/ // same functionality with /:/
规则细节
这条规则标志着可以安全地删除转义而不改变行为。
使用此规则的错误示例:
Open in Playground
/*eslint no-useless-escape: "error"*/
"\'";
'\"';
"\#";
"\e";
`\"`;
`\"${foo}\"`;
`\#{foo}`;
/\!/;
/\@/;
/[\[]/;
/[a-z\-]/;
使用此规则的正确示例:
Open in Playground
/*eslint no-useless-escape: "error"*/
"\"";
'\'';
"\x12";
"\u00a9";
"\371";
"xs\u2111";
`\``;
`\${${foo}}`;
`$\{${foo}}`;
/\\/g;
/\t/g;
/\w\$\*\^\./;
/[[]/;
/[\]]/;
/[a-z-]/;
何时不用
如果你不希望被通知有不必要的转义,你可以安全地禁用这个规则。
Version
This rule was introduced in ESLint v2.5.0.