JavaScript | Convert a string to boolean
Sometimes it is needed to convert a string representing boolean value “true”, “false” into intrinsic type of JavaScript. Given a string and the task is to convert given string to its boolean value.
Example 1: This example uses == operator to convert string to its boolean value.
<!DOCTYPE html> <html> <head> <title> Convert string to boolean </title> </head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <input id = "input" type="text" name="input"/> <button onclick="convertToBoolean()"> Click to convert </button> <h3 id = "div" style="color: green"></h3> <!-- Script to convert string to its boolean value --> <script> function convertToBoolean() { var input = document.getElementById("input"); var x = document.getElementById("div"); var str = input.value; x.innerHTML = str == 'true'; } </script> </body> </html> |
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Output:
- Before click on the button:
- After click on the button:
Example 2: This example uses === operator to convert string to its boolean value.
<!DOCTYPE html> <html> <head> <title> Convert string to boolean </title> </head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <input id = "input" type="text" name="input"/> <button onclick="convertToBoolean()"> Click to convert </button> <h3 id = "div" style="color: green"></h3> <!-- Script to convert string to its boolean value --> <script> function convertToBoolean() { var input = document.getElementById("input"); var x = document.getElementById("div"); var str = input.value; x.innerHTML = str === 'true'; } </script> </body> </html> |
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Output:
- Before click on the button:
- After click on the button:
