Function to count the characters of a string.

Function to count the characters of the company name, and it will show an alert message if the character count exceeds 74.

  function characterCount(scriptContext) {
            let vendorName = scriptContext.currentRecord.getValue({
                fieldId: 'companyname'
            });
            let vendorNameCount = vendorName.length;
            scriptContext.currentRecord.setValue({
                fieldId: 'custentity_jj_name_char_count',
                value: vendorNameCount
            });
            if (vendorNameCount > 74) {
                let countRem = vendorNameCount - 74;
                alert("Company name can't be greater than 74 characters. Reduce " + countRem + " character(s).");
                return false;
            } else {
                return true;
            }
        }