Express body-parser handling checkbox arrays on forms

Question

I have an HTML form with an array of checkboxes (using [] naming). I need to be able to process this with express. I\'m using body-parser.

Answer 1

My approach requires no javascript on client side. Add hidden fields as many as your checkboxes with same names

body parser will parse checked items as array and string others

I meant

If your option[1] is checked then body parser will parse it like

{option:['0', ['0', '1'], '0']}

And here is the modifier

req.body.option = req.body.option.map(item => (Array.isArray(item) && item[1]) || null);

so now body will be

{option: [null, '1', null]}