![]() ![]() It usually happens when we take string input from users or when we read files. In programming, sometimes boolean values ( true and false) are stored as strings ( "true" and "false"). ![]() To do so, we have nine different ways in which we can convert string to boolean in JavaScript. We would also like to invite you to try out Calendarific.Ĭalendarific is a global event intelligence platform and a developer-friendly worldwide holiday API covering public, bank, local, religious holidays that you can use within your applications.There are times when we have a string that contains "true" or "false" and we need to convert these strings to boolean (or bool) in Javascript. We hope you enjoying going over these tips, feel to leave a comment or share these tips and tricks you use when working booleans and strings in other programming languages. If the given string true matches, then the corresponding boolean is returned and boolean false is returned in every other case. That is, if your application will only use the value true, then you don’t need other combinations such as 1, on etc. Though we have used many string combinations for a true condition you may reduce them based on the string values stored by your application. Last but not least, we can use the switch-case control structure to cover all possible string value combinations which should lead to a true boolean value. Var boolValue = stringValue.toLowerCase() = 'true' ? true : false //returns true This is actually just the shorthand of the comparison operator, but we thought it’s still worth calling it out. ![]() In this next approach, we simply check the string for its equality with true and return a boolean true if there is a match and false otherwise using a ternary operator. Var boolValue = (/true/i).test(stringValue) //returns true i at the end of the regular expression is for case insensitive match. Now, if the string value is true, then boolValue will be true, else a false. In this case, we check whether the string contains true or not. Using the test method of javascript matches a regular expression against a string. Var boolValue = (stringValue ="true") //returns true If the string value is true, then the boolean value will also have a true, else a false as shown in the example below. With this approach, we are using the javascript equality operator to check the string value against a true value. Var boolValue = JSON.parse(falseValue) //returns false So, if the string value is ‘true’, it is converted to a boolean object with value as true and false otherwise.Ĭonst boolValue = JSON.parse(trueValue) //returns true JSON is a built-in object of javascript and its parse method parses a string as JSON and converts it into an object corresponding to the given text. One very easy way is to use the parse method of JSON. In this post, we will be going over 5 ways to easily convert a string value of True or False into it’s correspond boolean. env file, it gets returned as a string, which in some circumstances becomes a little difficult to work with. The are multiple situations that when a boolean value of either True or False is passed via a JSON API or an environment variable such as a. ![]()
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