How to remove all Non-ASCII characters from the string using JavaScript ?
Given a string containing some Non-ASCII characters and the task is to remove all Non-ASCII characters from the given string. There are two methods to solve this problem which are discussed below:
Approach 1:
- This approach uses a Regular Expression to remove the Non-ASCII characters from the string.
- Only characters that has value from zero to 127 are valid. (0x7F is 127 in hex).
- Use .replace() method to replace the Non-ASCII characters with the empty string.
Example: This example implements the above approach.
<!DOCTYPE HTML> <html> <head> <title> How to remove all Non-ASCII characters from the string using JavaScript ? </title></head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <p id = "GFG_UP" style = "font-size: 15px; font-weight: bold;"> </p> <button onclick = "gfg_Run()"> Click Here </button> <p id = "GFG_DOWN" style = "color:green; font-size: 20px; font-weight: bold;"> </p> <script> var el_up = document.getElementById("GFG_UP"); var el_down = document.getElementById("GFG_DOWN"); var str="Hidd©©©en??Ascii ©©®®®Charac££ter"; el_up.innerHTML = "Click on the button to remove" + " the all Non-ASCII characters from the" + " given string.<br>Str = '" + str + "'"; function gfg_Run() { str = str.replace(/[^\x00-\x7F]/g, ""); el_down.innerHTML = str; } </script> </body> </html> |
Output:
- Before clicking the button:
- After clicking the button:
Approach 2:
- This approach uses a Regular Expression to remove the Non-ASCII characters from the string like the previous example.
- It specifies the Unicode for the characters to remove. The range of characters between (0080 – FFFF) are removed.
- Use .replace() method to replace the Non-ASCII characters with the empty string.
Example: This example implements the above approach.
<!DOCTYPE HTML> <html> <head> <title> How to remove all Non-ASCII characters from the string using JavaScript ? </title></head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <p id = "GFG_UP" style = "font-size: 15px; font-weight: bold;"> </p> <button onclick = "gfg_Run()"> Click Here </button> <p id = "GFG_DOWN" style = "color:green; font-size: 20px; font-weight: bold;"> </p> <script> var el_up = document.getElementById("GFG_UP"); var el_down = document.getElementById("GFG_DOWN"); var str="Hidd©©©en??Ascii ©©®®®Charac££ter"; el_up.innerHTML = "Click on the button to remove" + " the all Non-ASCII characters from the" + " given string.<br>Str = '" + str + "'"; function gfg_Run() { str = str.replace(/[\u{0080}-\u{FFFF}]/gu, ""); el_down.innerHTML = str; } </script> </body> </html> |
Output:
- Before clicking on the button:
- After clicking on the button:
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