-function load_tax_table(table_id, deductible_id) {
- return apply_deductible(parse_tax_table(document.getElementById(table_id).value),
- parseFloat(document.getElementById(deductible_id).value));
+"use strict";
+
+function load_tax_table(table_id, deductible_id = null) {
+ const deductible = deductible_id == null ? 0.0 : parseFloat(document.getElementById(deductible_id).value);
+ return apply_deductible(parse_tax_table(document.getElementById(table_id).value), deductible);
}
function format_number(n) {
}
function calculate() {
- const table1 = load_tax_table('tax_table_1', 'deductible_1');
- const table2 = load_tax_table('tax_table_2', 'deductible_2');
+ const tax_tables = [
+ load_tax_table('tax_table_1', 'deductible_1'),
+ load_tax_table('tax_table_2', 'deductible_2'),
+ load_tax_table('tax_table_3'),
+ load_tax_table('tax_table_4'),
+ load_tax_table('tax_table_5')
+ ];
const after_tax = parseFloat(document.getElementById('after_tax').value);
- const before_tax = invert(merge_tax_tables(table1, table2))(after_tax);
-
- const tax1 = tax(table1, before_tax);
- const tax2 = tax(table2, before_tax);
+ const merged_tax_table = tax_tables.reduce(merge_tax_tables);
+ const before_tax = invert(merged_tax_table)(after_tax);
+ const taxes = tax_tables.map(t => tax(t, before_tax));
document.getElementById('before_tax').textContent = format_number(before_tax);
- document.getElementById('tax_1').textContent = format_number(tax1);
- document.getElementById('tax_2').textContent = format_number(tax2);
- document.getElementById('after_tax_verification').textContent = format_number(before_tax - (tax1 + tax2));
+ document.getElementById('tax_1').textContent = format_number(taxes[0]);
+ document.getElementById('tax_2').textContent = format_number(taxes[1]);
+ document.getElementById('tax_3').textContent = format_number(taxes[2]);
+ document.getElementById('tax_4').textContent = format_number(taxes[3]);
+ document.getElementById('tax_5').textContent = format_number(taxes[4]);
+ document.getElementById('after_tax_verification').textContent = format_number(before_tax - sum(taxes));
}