ruby on rails - Javascript for simple interest formula -
i totally new on javascript, had written following script in have calculate simple interest. script not working. in loan_request_amount principle, loan_request_no_of_emi time, loan_type_interest_rate rate .
<script type="text/javascript"> $(function(){ $('#loan_request_amount').on('input', function() { var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = (loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100.tofixed(2); } $('#loan_request_interest_amount').val(ans); }); $('#loan_request_no_of_emi').on('input', function() { var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = (loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100.tofixed(2); } $('#loan_request_interest_amount').val(ans); }); $('#loan_type_interest_rate').on('input', function() { var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_request_amount = parsefloat($('#loan_request_amount').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = (loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100.tofixed(2); } $('#loan_request_interest_amount').val(ans); }); }); </script> my entire form -
<div class="box box-default"> <div class="box-header with-border"> <h3 class="box-title">loan request</h3> <div class="box-body"> <%= bootstrap_form_for(@loan_request,html: {id: 'loan_request'}) |f| %> <div class="row"> <div class="col-sm-3"> <div class="form-group required"> <%= f.select :membership_id,all_membership,{label: 'member',include_blank: 'select member'} %> </div> </div> <div class="col-sm-3"> <div class="form-group required"> <%= f.select :loan_type_id,all_loan_type,label: 'loan type',include_blank: 'select loan type'%> </div> </div> <div class="col-sm-3"> <div class="form-group required"> <%= f.text_field :amount,label: 'amount', id: "loan_request_amount" %> </div> </div> <div class="col-sm-3"> <div class="form-group required"> <%= f.text_field :no_of_emi,label: 'no. of emi', id: "loan_request_no_of_emi"%> </div> </div> </div> <div class="row"> <div class="col-sm-3"> <div class="field"> <%= f.text_field :emi,label: 'emi'%> </div> </div> <div class="col-sm-3"> <div class="field"> <%= f.text_field :interest_amount,label: 'interest amount' , disabled_id: "loan_request_interest_amount" %> </div> </div> <div class="col-sm-3"> <div class="field"> <div class="input-group"> <div class="input-group-addon"> <i class="fa fa-calendar"></i> </div> <div class="form-group required"> <%= f.text_field :date, label: 'date', class: 'loan_request'%> </div> </div> </div> </div> <div class="col-sm-3"> <div class="actions" style="padding: 20px"> <%= f.submit'create loan request', :class => class_name, data: { disable_with: data_info } %> <!-- | < link_to 'back', loan_requests_path,class:'btn btn-sm btn-default fa fa-arrow-left' %> --> </div> </div> </div> </div> </div> <% end %> </div> <script type="text/javascript"> $(function(){ $('#loan_request_amount').on('input', function() { var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi)) { ans = "" } else{ ans = (loan_request_amount / loan_request_no_of_emi).tofixed(2); } $('#loan_request_emi').val(ans); }); $('#loan_request_no_of_emi').on('input', function() { var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_request_amount = parsefloat($('#loan_request_amount').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi)) { ans = "" } else{ ans = (loan_request_amount / loan_request_no_of_emi).tofixed(2); } $('#loan_request_emi').val(ans); }); }); </script> <script type="text/javascript"> $(function(){ $('#loan_request_amount').on('input', function() { var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = ((loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100).tofixed(2); } $('#loan_request_interest_amount').val(ans); }); $('#loan_request_no_of_emi').on('input', function() { var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = ((loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100).tofixed(2); } $('#loan_request_interest_amount').val(ans); }); $('#loan_type_interest_rate').on('input', function() { var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_request_amount = parsefloat($('#loan_request_amount').val()); var ans=""; if (isnan(loan_request_amount) || isnan(loan_request_no_of_emi) || isnan(loan_type_interest_rate)) { ans = "" } else{ ans = ((loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100).tofixed(2); } $('#loan_request_interest_amount').val(ans); }); }); </script> <script type="text/javascript"> $(function(){ $('.loan_request').datepicker({ changeyear:true, changemonth: true, yearrange: '-200:-0', dateformat: 'dd-mm-yy' }); }); </script> <script> $("#loan_request").validate({ rules: { "loan_request[membership_id]":{ required: true, }, "loan_request[amount]":{ required: true, numbersonly: true, }, "loan_request[loan_type_id]":{ required: true, }, "loan_request[no_of_emi]":{ required: true, numbersonly: true, }, "loan_request[date]":{ required: true, } }, messages: { "loan_request[membership_id]":{ required: "please select member", }, "loan_request[amount]":{ required: "please specify amount", }, "loan_request[loan_type_id]":{ required: "please select loan type ", }, "loan_request[no_of_emi]":{ required: "please specify no. of emi ", }, "loan_request[date]":{ required: "please select date ", } }, errorplacement: function(error, element) { error.css({"color": "red", "font-size": "12px","font-weight" : "normal"}) error.insertafter(element.parent(element)); } }); </script>
you have error in javascript. missing parenthese causes error:
ans = ((loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100).tofixed(2); before method tofixed, there no parenthese.
a complete , compact solution is:
$("#loan_request_amount,#loan_request_no_of_emi,#loan_type_interest_rate").on('input', function() { var loan_request_amount = parsefloat($('#loan_request_amount').val()); var loan_request_no_of_emi = parsefloat($('#loan_request_no_of_emi').val()); var loan_type_interest_rate = parsefloat($('#loan_type_interest_rate').val()); var ans=(loan_request_amount * loan_request_no_of_emi * (loan_type_interest_rate/12))/100; if (isnan(ans)) { ans = "" } else{ ans = ans.tofixed(2); } $('#loan_request_interest_amount').val(ans); }); 
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