Explanation
1. The range of matching characters using a hyphen (-) is not limited to letters. Can also match a range of numbers.
2. A series of letters and numbers can be combined in a single character set. In the = character set, the hyphen (-) defines the range of characters to match.
Example
要求 匹配字符串 quoteSample 中的所有字母。 注意：一定要同时匹配大小写字母。 let quoteSample = "The quick brown fox jumps over the lazy dog."; let alphabetRegex = /change/; // 修改这一行 let result = alphabetRegex; // 修改这一行 参考 let quoteSample = "The quick brown fox jumps over the lazy dog."; let alphabetRegex = /[a-z]/ig; // 修改这一行 let result = quoteSample.match(alphabetRegex); // 修改这一行
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