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How to restrict Chinese characters in a textbox using javascript


How to restrict Chinese characters in a textbox using javascript

By : user2952780
Date : November 19 2020, 03:59 PM
Any of those help You were going in the right direction with the regex. This code below checks for the Chinese characters sets in Unicode.
code :
$(".textTest input").keyup(function () {
    if ($(this).val().match(/[\u4E00-\u9FFF\u3400-\u4DFF\uF900-\uFAFF]+/g)) {
        alert('Chinese character sets');
    }
    else alert('English');
});


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Javascript. Restrict the user to input the same number characters as in the textbox

Javascript. Restrict the user to input the same number characters as in the textbox


By : Jose Manaure
Date : March 29 2020, 07:55 AM
I hope this helps . I will flash a scrambled word and then the user will type in what the scrambled word is.
code :
// Set an object with each letters of the (shuffled) word and their count
var letters = {};
for (var i=0 ; i<word.length ; i++) {
  var c = word.charAt(i);
  if ( ! letters[c]) letters[c] = 1;
  else letters[c]++;
}

...

function process_user_char(K) {
  // When user enter letter K
  if ( ! letters[K]) {
    alert("You cannot enter " + K);
    return false;
  }
  else {
    letters[K]-- ;
    return true;
  }
}

....

// To check wether user entered all letters, returns Yes or No
function check_if_user_entered_all_letters() {
  for (var o in letters) {
    if (letters[o]) return "No";
  }
  return "Yes";
}
How to restrict a textbox to accept 10 alphabetic characters only using javascript?

How to restrict a textbox to accept 10 alphabetic characters only using javascript?


By : Jay
Date : March 29 2020, 07:55 AM
help you fix your problem How to restrict a textbox to accept 10 characters only.If we enter 11th character, it should give a message saying 'you are allowed to enter 10 characters only'. , Try with this function:
code :
 function check_content(){
        var text = document.getElementById("your_textbox_id").value;
        if(text.length > 10){
            alert('Length should not be greater than 10');
            return false;
        } else { 
            return true;
        }
    }
Regex to restrict Chinese characters using javascript

Regex to restrict Chinese characters using javascript


By : Arya
Date : March 29 2020, 07:55 AM
will be helpful for those in need I am a novice in regex. I wan't the field to be only filled in English (I Don't want to allow any Chinese characters to be submitted) So far I've come up with this: , Try this:
code :
^[a-zA-Z ]+$
Restrict Less than < and Greater than > characters in textbox using javascript or Jquery or Regular Expression val

Restrict Less than < and Greater than > characters in textbox using javascript or Jquery or Regular Expression val


By : Francis Fernandez
Date : March 29 2020, 07:55 AM
will help you You may try the following approach, it will prevent inserting > and < sign.
code :
  function myKeyPress(e){
    var keynum;
    if(window.event) { // IE                    
      keynum = e.keyCode;
    } else if(e.which){ // Netscape/Firefox/Opera                   
      keynum = e.which;
    }
    if(keynum==62 || keynum==60)
        e.preventDefault();
  }
<input id="txt" onkeypress="return myKeyPress(event)" />
Allow chinese characters and English numbers only in textbox - Javascript

Allow chinese characters and English numbers only in textbox - Javascript


By : Ranjana Singh
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Your pattern is checking if the input contains at least one such character. As long as there will be either a number, or a Chinese character, it will consider your input as valid.
What you want is to find if there is any character that do not match this pattern. To do so, you simply need to use a negated character class [^... and then check if string.match(regex) is falsy.
code :
const reg = /[^\u4E00-\u9FFF\u3400-\u4DFF\uF900-\uFAFF0-9]+/g;
const test = txt => {
  console.log(txt, !txt.match(reg));
};


test('090 asffa'); // false
test('0342eq###'); // false
test('42242442dsfsfs'); // false
test('foo我'); // false
test('245我吧'); // true
test('245'); // true
test('我吧'); // true
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