Ptt 大爆卦 | Whether if - 前往 https://stackoverflow.com/questions/1789945/how-to-check-whether-a-string-contains-a-substring-in-javascript

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How to check whether a string contains a substring in ...

indexOf , which returns -1 when a substring cannot be found: var string = "foo"; var substring = "oo"; console.log(string.indexOf(substring) !==

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