I have already set the maximum length, but now I need the user to enter not less than a certain amount

This is the script I'm using :

function PreSaveAction() {
var control = getElementByID("IBAN(24 Digits Alpha Numeric)");
 if(control.value.length < 24) 
  alert("The length in this field should not be less than 24 chars"); 
  return false; // Cancel the item save process 
else { return true ;}
  • Is this working for you or not? may be getElementByID is not returning anything. – Ganesh Sanap May 13 '19 at 7:26
  • @GaneshSanap No, this isn't working for me. And yes, I too think that getElementByID is not returning anything. What would be the correct way to get value from the input field? – Nyrmil Nanji May 13 '19 at 7:31
  • Try the solution given below. let me know if it works for you. – Ganesh Sanap May 13 '19 at 7:32
  • @GaneshSanap no it doesnt, since i get a word count/limit error. – Nyrmil Nanji May 13 '19 at 7:34

SharePoint OOTB Solution:

Use Column Validation:

  1. Go to your list settings.
  2. Click on your text column.
  3. Move to column validation section and enter below expression:

    =LEN([your column name])>24

And you can enter some message in user message section.

JavaScript Approach:

Try using below code:

Assuming the display name of your field is "IBAN(24 Digits Alpha Numeric)".

var control = document.querySelector("input[title^='IBAN(24 Digits Alpha Numeric)']");
  • i have already used column validation for something else, so when i add this line of code, it gives me a word count error :) – Nyrmil Nanji May 13 '19 at 7:33
  • Can you post the existing formula? so that we can merge the formula and see if it works. – Ganesh Sanap May 13 '19 at 7:34
  • =AND(IF(ISERROR(FIND(",",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("&",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("!",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("@",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("#",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("$",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("%",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("*",[IBAN(24 Digits Alpha Numeric)])),TRUE),IF(ISERROR(FIND("-",[IBAN(24 Digits Alpha Numeric)])),TRUE)) – Nyrmil Nanji May 13 '19 at 7:37
  • The text you entered for the Validation Formula must be 1024 characters or fewer, including the leading '=' character. – Nyrmil Nanji May 13 '19 at 7:39
  • Tried using the JavaScript approach but it does not work :( – Nyrmil Nanji May 13 '19 at 7:44

Please try below code to get the control element:

var control = WebForm_GetElementById("IBAN(24 Digits Alpha Numeric)");

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