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Change integer pixels by .02px rather than 1px #28

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Change integer pixels by .02px rather than 1px #28

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28 changes: 15 additions & 13 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,6 @@ const feature_unit = {
// Supported min-/max- attributes
const feature_name = Object.keys(feature_unit);

const step = .001; // smallest even number that won’t break complex queries (1in = 96px)

const power = {
'>': 1,
'<': -1
Expand All @@ -30,18 +28,22 @@ function create_query(name, gtlt, eq, value) {
return value.replace(/([-\d\.]+)(.*)/, function (_match, number, unit) {
const initialNumber = parseFloat(number);

if (parseFloat(number) || eq) {
// if eq is true, then number remains same
if (!eq) {
// change integer pixels value only on integer pixel
if (unit === 'px' && initialNumber === parseInt(number, 10)) {
number = initialNumber + power[gtlt];
} else {
number = Number(Math.round(parseFloat(number) + step * power[gtlt] + 'e6')+'e-6');
}
// if eq is true, then number remains same
if (!eq) {
if (!initialNumber) {
unit = feature_unit[name];
}
let step;
if (unit === 'px' && initialNumber === Math.round(initialNumber)) {
// change integer pixels by .02px to work around a Safari rounding bug:
// https://bugs.webkit.org/show_bug.cgi?id=178261
// https://github.com/twbs/bootstrap/pull/25177
step = .02;
} else {
// smallest even number that won’t break complex queries (1in = 96px)
step = .001;
}
} else {
number = power[gtlt] + feature_unit[name];
number = Number((initialNumber + step * power[gtlt]).toFixed(6));
}

return '(' + minmax[gtlt] + '-' + name + ': ' + number + unit + ')';
Expand Down
12 changes: 6 additions & 6 deletions test/fixtures/min-max.output.css
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Original file line number Diff line number Diff line change
@@ -1,28 +1,28 @@
@media screen and (min-width: 501px) and (max-width: 1199px) {}
@media screen and (min-width: 500.02px) and (max-width: 1199.98px) {}

@media screen and (min-width: 501px) and (max-width: 1199px) {}
@media screen and (min-width: 500.02px) and (max-width: 1199.98px) {}

@media screen and (min-width: 40.001em) and (max-width: 59.999em) {}

@media screen and (min-width: 13.801rem) and (max-width: 51.2rem) {}

@media screen and (min-width: 6.001in) and (max-width: 8.999in) {}

@media screen and (min-width: 1px) and (max-width: 500.579px) {}
@media screen and (min-width: 0.02px) and (max-width: 500.579px) {}

@media screen and (width) and (min-width: 0.081px) and (max-width: 0.679px) {}

/* height */
@media screen and (min-height: 501px) and (max-height: 1199px) {}
@media screen and (min-height: 500.02px) and (max-height: 1199.98px) {}

@media screen and (min-height: 501px) and (max-height: 1199px) {}
@media screen and (min-height: 500.02px) and (max-height: 1199.98px) {}

@media screen and (min-height: 40.001em) and (max-height: 59.999em) {}

@media screen and (min-height: 13.8rem) and (max-height: 51.199rem) {}

@media screen and (min-height: 6.001in) and (max-height: 8.999in) {}

@media screen and (min-height: 1px) and (max-height: 500.579px) {}
@media screen and (min-height: 0.02px) and (max-height: 500.579px) {}

@media screen and (height) and (min-height: 0.081px) and (max-height: 0.679px) {}
12 changes: 6 additions & 6 deletions test/fixtures/shorthands.output.css
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Original file line number Diff line number Diff line change
@@ -1,11 +1,11 @@
@media (min-width: 768px) and (max-width: 1023px) {}
@media (min-width: 768px) and (max-width: 1023px) {}
@media (min-width: 768px) and (max-width: 1023.98px) {}
@media (min-width: 768px) and (max-width: 1023.98px) {}

@media (min-width: 769px) and (max-width: 1024px) {}
@media (min-width: 769px) and (max-width: 1024px) {}
@media (min-width: 768.02px) and (max-width: 1024px) {}
@media (min-width: 768.02px) and (max-width: 1024px) {}

@media (min-width: 768px) and (max-width: 1024px) {}
@media (min-width: 768px) and (max-width: 1024px) {}

@media (min-width: 769px) and (max-width: 1023px) {}
@media (min-width: 769px) and (max-width: 1023px) {}
@media (min-width: 768.02px) and (max-width: 1023.98px) {}
@media (min-width: 768.02px) and (max-width: 1023.98px) {}