function detach(node) {
node.parentNode.removeChild(node);
}
function findAnchor(node) {
while (node && node.nodeName.toUpperCase() !== 'A')
node = node.parentNode; // SVG elements have a lowercase name
return node;
}
function which(event) {
return event.which === null ? event.button : event.which;
}
function scroll_state() {
return {
x: window.scrollX,
y: window.scrollY
};
}
var component;
var target;
var routes;
var errors;
var history = typeof window !== 'undefined' ? window.history : {
pushState: function (state, title, href) { },
replaceState: function (state, title, href) { },
scrollRestoration: ''
};
var scroll_history = {};
var uid = 1;
var cid;
if ('scrollRestoration' in history) {
history.scrollRestoration = 'manual';
}
function select_route(url) {
if (url.origin !== window.location.origin)
return null;
var _loop_1 = function (route) {
var match = route.pattern.exec(url.pathname);
if (match) {
if (route.ignore)
return { value: null };
var params = route.params(match);
var query_1 = {};
if (url.search.length > 0) {
url.search.slice(1).split('&').forEach(function (searchParam) {
var _a = /([^=]+)=(.*)/.exec(searchParam), key = _a[1], value = _a[2];
query_1[key] = value || true;
});
}
return { value: { url: url, route: route, data: { params: params, query: query_1 } } };
}
};
for (var _i = 0, routes_1 = routes; _i < routes_1.length; _i++) {
var route = routes_1[_i];
var state_1 = _loop_1(route);
if (typeof state_1 === "object")
return state_1.value;
}
}
var current_token;
function render(Component, data, scroll, token) {
if (current_token !== token)
return;
if (component) {
component.destroy();
}
else {
// first load — remove SSR'd contents
var start = document.querySelector('#sapper-head-start');
var end = document.querySelector('#sapper-head-end');
if (start && end) {
while (start.nextSibling !== end)
detach(start.nextSibling);
detach(start);
detach(end);
}
}
component = new Component({
target: target,
data: data,
hydrate: !component
});
if (scroll) {
window.scrollTo(scroll.x, scroll.y);
}
}
function prepare_route(Component, data) {
var redirect = null;
var error = null;
if (!Component.preload) {
return { Component: Component, data: data, redirect: redirect, error: error };
}
if (!component && window.__SAPPER__ && window.__SAPPER__.preloaded) {
return { Component: Component, data: Object.assign(data, window.__SAPPER__.preloaded), redirect: redirect, error: error };
}
return Promise.resolve(Component.preload.call({
redirect: function (statusCode, location) {
redirect = { statusCode: statusCode, location: location };
},
error: function (statusCode, message) {
error = { statusCode: statusCode, message: message };
}
}, data))["catch"](function (err) {
error = { statusCode: 500, message: err };
}).then(function (preloaded) {
if (error) {
var route = error.statusCode >= 400 && error.statusCode < 500
? errors['4xx']
: errors['5xx'];
return route.load().then(function (_a) {
var Component = _a["default"];
var err = error.message instanceof Error ? error.message : new Error(error.message);
Object.assign(data, { status: error.statusCode, error: err });
return { Component: Component, data: data, redirect: null };
});
}
Object.assign(data, preloaded);
return { Component: Component, data: data, redirect: redirect };
});
}
function navigate(target, id) {
if (id) {
// popstate or initial navigation
cid = id;
}
else {
// clicked on a link. preserve scroll state
scroll_history[cid] = scroll_state();
id = cid = ++uid;
scroll_history[cid] = { x: 0, y: 0 };
}
cid = id;
var loaded = prefetching && prefetching.href === target.url.href ?
prefetching.promise :
target.route.load().then(function (mod) { return prepare_route(mod["default"], target.data); });
prefetching = null;
var token = current_token = {};
return loaded.then(function (_a) {
var Component = _a.Component, data = _a.data, redirect = _a.redirect;
if (redirect) {
return goto(redirect.location, { replaceState: true });
}
render(Component, data, scroll_history[id], token);
});
}
function handle_click(event) {
// Adapted from https://github.com/visionmedia/page.js
// MIT license https://github.com/visionmedia/page.js#license
if (which(event) !== 1)
return;
if (event.metaKey || event.ctrlKey || event.shiftKey)
return;
if (event.defaultPrevented)
return;
var a = findAnchor(event.target);
if (!a)
return;
// check if link is inside an svg
// in this case, both href and target are always inside an object
var svg = typeof a.href === 'object' && a.href.constructor.name === 'SVGAnimatedString';
var href = String(svg ? a.href.baseVal : a.href);
if (href === window.location.href) {
event.preventDefault();
return;
}
// Ignore if tag has
// 1. 'download' attribute
// 2. rel='external' attribute
if (a.hasAttribute('download') || a.getAttribute('rel') === 'external')
return;
// Ignore if has a target
if (svg ? a.target.baseVal : a.target)
return;
var url = new URL(href);
// Don't handle hash changes
if (url.pathname === window.location.pathname && url.search === window.location.search)
return;
var target = select_route(url);
if (target) {
navigate(target, null);
event.preventDefault();
history.pushState({ id: cid }, '', url.href);
}
}
function handle_popstate(event) {
scroll_history[cid] = scroll_state();
if (event.state) {
var url = new URL(window.location.href);
var target_1 = select_route(url);
navigate(target_1, event.state.id);
}
else {
// hashchange
cid = ++uid;
history.replaceState({ id: cid }, '', window.location.href);
}
}
var prefetching = null;
function prefetch(href) {
var selected = select_route(new URL(href));
if (selected) {
prefetching = {
href: href,
promise: selected.route.load().then(function (mod) { return prepare_route(mod["default"], selected.data); })
};
}
}
function handle_touchstart_mouseover(event) {
var a = findAnchor(event.target);
if (!a || a.rel !== 'prefetch')
return;
prefetch(a.href);
}
var inited;
function init(_target, _routes) {
target = _target;
routes = _routes.filter(function (r) { return !r.error; });
errors = {
'4xx': _routes.find(function (r) { return r.error === '4xx'; }),
'5xx': _routes.find(function (r) { return r.error === '5xx'; })
};
if (!inited) {
window.addEventListener('click', handle_click);
window.addEventListener('popstate', handle_popstate);
// prefetch
window.addEventListener('touchstart', handle_touchstart_mouseover);
window.addEventListener('mouseover', handle_touchstart_mouseover);
inited = true;
}
return Promise.resolve().then(function () {
var _a = window.location, hash = _a.hash, href = _a.href;
var deep_linked = hash && document.getElementById(hash.slice(1));
scroll_history[uid] = deep_linked ?
{ x: 0, y: deep_linked.getBoundingClientRect().top } :
scroll_state();
history.replaceState({ id: uid }, '', href);
var target = select_route(new URL(window.location.href));
return navigate(target, uid);
});
}
function goto(href, opts) {
if (opts === void 0) { opts = { replaceState: false }; }
var target = select_route(new URL(href, window.location.href));
if (target) {
navigate(target, null);
if (history)
history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
}
else {
window.location.href = href;
}
}
function prefetchRoutes(pathnames) {
if (!routes)
throw new Error("You must call init() first");
return routes
.filter(function (route) {
if (!pathnames)
return true;
return pathnames.some(function (pathname) {
return route.error
? route.error === pathname
: route.pattern.test(pathname);
});
})
.reduce(function (promise, route) {
return promise.then(route.load);
}, Promise.resolve());
}
export { component, prefetch, init, goto, prefetchRoutes, prefetchRoutes as preloadRoutes };