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JavaScript – Use Variables with Regular Expressions

So you know the basics of Regular Expressions in JavaScript and often use it for replacing text etc. Example: [code] var sentence = 'Regular Expression'; sentence.replace(/ssion/, 'shun'); // "Regular Expreshun" [/code] Now what if the string you need to replace needs to be flexible? Well you could use a variable! [code] var replacee = 'sion'; var replacer = 'hun'; sentence.replace(/+ replacee +/, replacer); // SyntaxError ...