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feat(theme-classic): store selected tab in query string. #8225

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merged 20 commits into from Dec 9, 2022
Merged

feat(theme-classic): store selected tab in query string. #8225

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c621e42
feat(theme-classic): store selected tab in query string.
mturoci Oct 18, 2022
634c0f2
test: fix failing tests
mturoci Oct 18, 2022
52fa90b
chore: Use react router instead of native window location.
mturoci Oct 24, 2022
04053c5
fix: Make tabs sync work again.
mturoci Oct 24, 2022
216119d
test: Temporarily skip tabs tests.
mturoci Oct 24, 2022
cabac96
fix: Make queryString param optional.
mturoci Oct 25, 2022
80e978d
test: Remove tab unit test skip.
mturoci Oct 30, 2022
6e1fb03
feat: Querystring user props valdiation.
mturoci Oct 30, 2022
7eb1334
chore: Remove unnecessary env var.
mturoci Oct 30, 2022
66a3939
chore: Refactor.
mturoci Oct 30, 2022
4213dc2
docs: Document the tab querystring behavior.
mturoci Oct 30, 2022
60813d8
chore: Remove unnecessary and outdated comments.
mturoci Oct 30, 2022
5e38a1f
fix: Remove forgotten code for default value.
mturoci Oct 30, 2022
f8eb751
better querystring implementation refactor
slorber Dec 9, 2022
13aec5d
better tab querystring doc
slorber Dec 9, 2022
3d2a36f
ensure queryString wins over localStorage
slorber Dec 9, 2022
0d48df6
doc
slorber Dec 9, 2022
5264f83
// highlight-next-line
slorber Dec 9, 2022
1bd6561
fix scrollAfterNavigation logic to not mess-up with query-string chan…
slorber Dec 9, 2022
c2eca08
fix tab selected value restoration logic
slorber Dec 9, 2022
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71 changes: 54 additions & 17 deletions packages/docusaurus-theme-classic/src/theme/Tabs/index.tsx
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Expand Up @@ -31,6 +31,16 @@ function isTabItem(
return 'value' in comp.props;
}

const NON_GROUP_TAB_KEY = '__noGroup__';
function getValueFromSearchParams(groupId = NON_GROUP_TAB_KEY): string | null {
if (typeof window === 'undefined') {
return null; // Ignore during SSR.
}
const searchParams = new URLSearchParams(window.location.search);
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const prevSearchParams = searchParams.get('tabs');
return prevSearchParams ? JSON.parse(prevSearchParams)[groupId] : null;
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}

function TabsComponent(props: Props): JSX.Element {
const {
lazy,
Expand Down Expand Up @@ -69,16 +79,15 @@ function TabsComponent(props: Props): JSX.Element {
.join(', ')}" found in <Tabs>. Every value needs to be unique.`,
);
}
// When defaultValueProp is null, don't show a default tab
const defaultValue =
defaultValueProp === null
? defaultValueProp
: defaultValueProp ??
children.find((child) => child.props.default)?.props.value ??
children[0]!.props.value;
if (defaultValue !== null && !values.some((a) => a.value === defaultValue)) {

// Warn user about passing incorrect defaultValue as prop.
if (
defaultValueProp !== null &&
defaultValueProp !== undefined &&
!values.some((a) => a.value === defaultValueProp)
) {
Comment on lines -72 to +133
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can you explain the intent here? Not sure to understand

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Very similar to the prev check. However, this new one only throws in case of user-error. E.g. available tab keys are ke1, key2, key3, but user supplies key4. The goal is to notify user it's their fault that the tabs are not working properly.

The prev implementation would throw even if the error was on the Docusaurus (implementation) side as it checked the derived value instead of user supplied one.

throw new Error(
`Docusaurus error: The <Tabs> has a defaultValue "${defaultValue}" but none of its children has the corresponding value. Available values are: ${values
`Docusaurus error: The <Tabs> has a defaultValue "${defaultValueProp}" but none of its children has the corresponding value. Available values are: ${values
.map((a) => a.value)
.join(
', ',
Expand All @@ -87,21 +96,37 @@ function TabsComponent(props: Props): JSX.Element {
}

const {tabGroupChoices, setTabGroupChoices} = useTabGroupChoice();
const [selectedValue, setSelectedValue] = useState(defaultValue);
const tabRefs: (HTMLLIElement | null)[] = [];
const {blockElementScrollPositionUntilNextRender} =
useScrollPositionBlocker();

if (groupId != null) {
// search params >
// local storage >
// specified defaultValue >
// first child with "default" attr >
// first tab item.
let defaultValue: string | null | undefined =
getValueFromSearchParams(groupId);
if (!defaultValue && groupId != null) {
const relevantTabGroupChoice = tabGroupChoices[groupId];
if (
relevantTabGroupChoice != null &&
relevantTabGroupChoice !== selectedValue &&
relevantTabGroupChoice !== defaultValue &&
values.some((value) => value.value === relevantTabGroupChoice)
) {
setSelectedValue(relevantTabGroupChoice);
defaultValue = relevantTabGroupChoice;
}
}
// If we didn't find the right value in search params or local storage,
// fallback to props > child with "default" specified > first tab.
if (!defaultValue || !values.some((a) => a.value === defaultValue)) {
defaultValue =
defaultValueProp !== undefined
? defaultValueProp
: children.find((child) => child.props.default)?.props.value ??
children[0]!.props.value;
}

const [selectedValue, setSelectedValue] = useState(defaultValue);
const tabRefs: (HTMLLIElement | null)[] = [];
const {blockElementScrollPositionUntilNextRender} =
useScrollPositionBlocker();

const handleTabChange = (
event:
Expand All @@ -117,6 +142,18 @@ function TabsComponent(props: Props): JSX.Element {
blockElementScrollPositionUntilNextRender(newTab);
setSelectedValue(newTabValue);

const searchParams = new URLSearchParams(window.location.search);
const prevSearchParams = searchParams.get('tabs');
const prevVal = prevSearchParams ? JSON.parse(prevSearchParams) : null;
const newVal = {[groupId || NON_GROUP_TAB_KEY]: newTabValue};
const url = new URL(window.location.origin + window.location.pathname);
searchParams.set(
'tabs',
JSON.stringify(prevVal ? {...prevVal, ...newVal} : newVal),
);
url.search = searchParams.toString();
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window.history.replaceState({}, '', url);
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if (groupId != null) {
setTabGroupChoices(groupId, String(newTabValue));
}
Expand Down