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<!DOCTYPE HTML>
<html>
<head>
<title>StepUp() method of HTMLInputElement</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="author" title="Simon Wülker" href="mailto:simon.wuelker@arcor.de">
<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#the-step-attribute">
</head>
<body>
<script>
const INPUT_TYPES_THAT_CANT_STEP = [
"button",
"checkbox",
"color",
"email",
"file",
"hidden",
"image",
"password",
"radio",
"reset",
"search",
"submit",
"tel",
"text",
"url"
];
const INPUT_TYPES_THAT_CAN_STEP = [
"date",
"datetime-local",
"month",
"number",
"range",
"time",
"week",
];
for (input_type of INPUT_TYPES_THAT_CANT_STEP) {
test(() => {
let input = document.createElement("input");
input.setAttribute("type", input_type);
assert_throws_dom("InvalidStateError", () => {
input.stepUp();
});
}, "Calling stepUp on input type=" + input_type + " should throw a DOMException")
}
test(() => {
let input = document.createElement("input");
input.setAttribute("type", "number");
input.setAttribute("step", "any");
assert_throws_dom("InvalidStateError", () => {
input.stepUp();
});
}, "Calling stepUp when the step attribute is \"any\" should throw a DOMException")
const DEFAULT_STEP_SIZES = {
"date": 1,
"datetime-local": 60,
"month": 1,
"number": 1,
"time": 60,
"range": 1,
"week": 1,
};
const STEP_SCALE_FACTORS = {
"date": 86400000,
"datetime-local": 1000,
"month": 1,
"number": 1,
"range": 1,
"time": 1000,
"week": 604800000,
};
for (const input_type of INPUT_TYPES_THAT_CAN_STEP) {
const default_step_size = DEFAULT_STEP_SIZES[input_type];
const step_scale_factor = STEP_SCALE_FACTORS[input_type];
// Some input types (like "week") can't be reset with
// valueAsNumber=0
test(() => {
let input = document.createElement("input");
input.setAttribute("type", input_type);
input.stepUp();
const previous = input.valueAsNumber;
input.stepUp();
assert_equals(input.valueAsNumber, previous + default_step_size * step_scale_factor);
}, "Step delta from stepUp on input type=" + input_type + " with no step attribute");
for (step of ["0", "-2", "bogus"]) {
test(() => {
let input = document.createElement("input");
input.setAttribute("type", input_type);
input.setAttribute("step", step);
input.stepUp();
const previous = input.valueAsNumber;
input.stepUp();
assert_equals(input.valueAsNumber, previous + default_step_size * step_scale_factor);
}, "Step delta from stepUp on input type=" + input_type + " with step=" + step);
}
test(() => {
let input = document.createElement("input");
input.setAttribute("type", input_type);
input.setAttribute("step", "2");
input.stepUp();
const previous = input.valueAsNumber;
input.stepUp();
assert_equals(input.valueAsNumber, previous + 2 * step_scale_factor);
}, "Step delta from stepUp on input type=" + input_type + " with step=2");
}
test(() => {
let input = document.createElement("input");
input.setAttribute("type", "number");
input.valueAsNumber = 0;
input.min = 10;
input.max = 5;
input.stepUp();
assert_equals(input.valueAsNumber, 0);
}, "stepUp should do nothing if the input minimum is larger than the input maximum")
test(() => {
let input = document.createElement("input");
input.setAttribute("type", "number");
input.valueAsNumber = 0;
input.step = 3;
input.max = 7;
input.stepUp(3);
assert_equals(input.valueAsNumber, 6);
}, "stepUp should clamp to the input maximum");
</script>
</body>
</html>
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