str = "ABCDEF"; re = /DEF/ig; console.log(re.test(str)); // => true ãããã³ã° str.match(regexp) str ã«å¯¾ãã¦æ£è¦è¡¨ç¾ regexp ã§ãããã³ã°ãè¡ãçµæãè¿ãã¾ãããããããªãã£ãå ´å㯠null ãè¿ãã¾ãã const ret = "abc123".match(/[0-9]+/); console.log(ret); // => ['123', index:3, input:'abc123', groups:undefined] console.log(ret[0]); // ãããããæåå: '123' console.log(ret.index); // è¦ã¤ãã£ãå ´æã®ã¤ã³ããã¯ã¹: 3 console.log(ret.input); // å ¥åæåå: 'abc123' ã°ãã¼ãã«ã


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