Le 31 déc. 2012 à 18:58, Axel Rauschmayer <[email protected]> a écrit :
>> Personally, I have issues with from- and to-String conversions when working >> with HTML form field values and data-* attributes. More precisely, I am >> careful to make these conversions manually, and I regret that JS doesn't >> warn me if I forget to do them. Indeed the following cases are problematic: >> >> * String-to-Number : not triggered in, e.g., x + '1' when x is a Number. > > I would assume the opposite being a problem: The user enters the number '33' > in a form field, you try to add 1, but forget that it is a string and end up > with '331' instead of 34. It is what I meant: (but I should have written: x + myFormField.value to be clearer). > >> * Boolean-to-String, Null-to-String: false and null are not converted to a >> falsy string. > > When does this happen? Can you explain? When you store «false» in a HTML data-* attribute, and retrieve it later from there, you don't get a falsy value if you had naively relied on the implicit conversions. Or, when you put a boolean in a hidden form field and expect it to be treated as truthy/falsy server-side by the program receiving the form. —Claude _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
