I am looking to let users input values that are multiples of 0.10, such as - 0.10, 0.20, 0.30....1.00, 1.10, 1.20...1.90, and so on.
When a user enters a value in the text box, I have been checking the following validation:
amount % 0.10 == 0
Is this approach correct, or should I round the remainder instead?
Using the remainder (modulo) operation is only possible with integers, not other types of numbers. To achieve such functionality, you will need to convert your numbers into integers.
This can be done by multiplying their value by 10, for example:
1.2 x 10 = 12
After that, you can utilize JavaScript's Number.isInteger method to check if it is an integer:
function validate(n) {
let castedNumber = n*10;
let isInteger = Number.isInteger(castedNumber);
return isInteger;
}
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