mirror of
https://github.com/kevin-DL/sapper.git
synced 2026-01-12 03:05:12 +00:00
272 lines
9.0 KiB
JavaScript
272 lines
9.0 KiB
JavaScript
function detach(node) {
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node.parentNode.removeChild(node);
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}
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function findAnchor(node) {
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while (node && node.nodeName.toUpperCase() !== 'A')
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node = node.parentNode; // SVG <a> elements have a lowercase name
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return node;
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}
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function which(event) {
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return event.which === null ? event.button : event.which;
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}
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function scroll_state() {
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return {
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x: window.scrollX,
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y: window.scrollY
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};
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}
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var component;
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var target;
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var routes;
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var errors;
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var history = typeof window !== 'undefined' ? window.history : {
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pushState: function (state, title, href) { },
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replaceState: function (state, title, href) { },
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scrollRestoration: ''
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};
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var scroll_history = {};
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var uid = 1;
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var cid;
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if ('scrollRestoration' in history) {
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history.scrollRestoration = 'manual';
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}
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function select_route(url) {
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if (url.origin !== window.location.origin)
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return null;
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var _loop_1 = function (route) {
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var match = route.pattern.exec(url.pathname);
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if (match) {
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if (route.ignore)
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return { value: null };
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var params = route.params(match);
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var query_1 = {};
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if (url.search.length > 0) {
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url.search.slice(1).split('&').forEach(function (searchParam) {
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var _a = /([^=]+)=(.*)/.exec(searchParam), key = _a[1], value = _a[2];
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query_1[key] = value || true;
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});
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}
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return { value: { url: url, route: route, data: { params: params, query: query_1 } } };
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}
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};
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for (var _i = 0, routes_1 = routes; _i < routes_1.length; _i++) {
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var route = routes_1[_i];
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var state_1 = _loop_1(route);
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if (typeof state_1 === "object")
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return state_1.value;
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}
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}
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var current_token;
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function render(Component, data, scroll, token) {
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if (current_token !== token)
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return;
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if (component) {
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component.destroy();
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}
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else {
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// first load — remove SSR'd <head> contents
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var start = document.querySelector('#sapper-head-start');
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var end = document.querySelector('#sapper-head-end');
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if (start && end) {
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while (start.nextSibling !== end)
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detach(start.nextSibling);
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detach(start);
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detach(end);
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}
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}
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component = new Component({
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target: target,
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data: data,
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hydrate: !component
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});
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if (scroll) {
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window.scrollTo(scroll.x, scroll.y);
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}
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}
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function prepare_route(Component, data) {
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var redirect = null;
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var error = null;
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if (!Component.preload) {
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return { Component: Component, data: data, redirect: redirect, error: error };
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}
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if (!component && window.__SAPPER__ && window.__SAPPER__.preloaded) {
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return { Component: Component, data: Object.assign(data, window.__SAPPER__.preloaded), redirect: redirect, error: error };
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}
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return Promise.resolve(Component.preload.call({
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redirect: function (statusCode, location) {
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redirect = { statusCode: statusCode, location: location };
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},
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error: function (statusCode, message) {
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error = { statusCode: statusCode, message: message };
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}
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}, data))["catch"](function (err) {
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error = { statusCode: 500, message: err };
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}).then(function (preloaded) {
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if (error) {
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var route = error.statusCode >= 400 && error.statusCode < 500
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? errors['4xx']
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: errors['5xx'];
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return route.load().then(function (_a) {
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var Component = _a["default"];
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var err = error.message instanceof Error ? error.message : new Error(error.message);
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Object.assign(data, { status: error.statusCode, error: err });
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return { Component: Component, data: data, redirect: null };
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});
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}
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Object.assign(data, preloaded);
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return { Component: Component, data: data, redirect: redirect };
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});
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}
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function navigate(target, id) {
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if (id) {
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// popstate or initial navigation
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cid = id;
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}
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else {
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// clicked on a link. preserve scroll state
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scroll_history[cid] = scroll_state();
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id = cid = ++uid;
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scroll_history[cid] = { x: 0, y: 0 };
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}
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cid = id;
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var loaded = prefetching && prefetching.href === target.url.href ?
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prefetching.promise :
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target.route.load().then(function (mod) { return prepare_route(mod["default"], target.data); });
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prefetching = null;
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var token = current_token = {};
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return loaded.then(function (_a) {
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var Component = _a.Component, data = _a.data, redirect = _a.redirect;
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if (redirect) {
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return goto(redirect.location, { replaceState: true });
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}
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render(Component, data, scroll_history[id], token);
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});
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}
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function handle_click(event) {
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// Adapted from https://github.com/visionmedia/page.js
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// MIT license https://github.com/visionmedia/page.js#license
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if (which(event) !== 1)
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return;
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if (event.metaKey || event.ctrlKey || event.shiftKey)
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return;
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if (event.defaultPrevented)
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return;
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var a = findAnchor(event.target);
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if (!a)
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return;
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// check if link is inside an svg
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// in this case, both href and target are always inside an object
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var svg = typeof a.href === 'object' && a.href.constructor.name === 'SVGAnimatedString';
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var href = String(svg ? a.href.baseVal : a.href);
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if (href === window.location.href) {
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event.preventDefault();
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return;
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}
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// Ignore if tag has
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// 1. 'download' attribute
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// 2. rel='external' attribute
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if (a.hasAttribute('download') || a.getAttribute('rel') === 'external')
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return;
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// Ignore if <a> has a target
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if (svg ? a.target.baseVal : a.target)
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return;
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var url = new URL(href);
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// Don't handle hash changes
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if (url.pathname === window.location.pathname && url.search === window.location.search)
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return;
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var target = select_route(url);
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if (target) {
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navigate(target, null);
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event.preventDefault();
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history.pushState({ id: cid }, '', url.href);
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}
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}
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function handle_popstate(event) {
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scroll_history[cid] = scroll_state();
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if (event.state) {
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var url = new URL(window.location.href);
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var target_1 = select_route(url);
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navigate(target_1, event.state.id);
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}
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else {
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// hashchange
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cid = ++uid;
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history.replaceState({ id: cid }, '', window.location.href);
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}
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}
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var prefetching = null;
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function prefetch(href) {
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var selected = select_route(new URL(href));
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if (selected) {
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prefetching = {
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href: href,
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promise: selected.route.load().then(function (mod) { return prepare_route(mod["default"], selected.data); })
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};
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}
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}
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function handle_touchstart_mouseover(event) {
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var a = findAnchor(event.target);
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if (!a || a.rel !== 'prefetch')
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return;
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prefetch(a.href);
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}
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var inited;
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function init(_target, _routes) {
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target = _target;
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routes = _routes.filter(function (r) { return !r.error; });
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errors = {
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'4xx': _routes.find(function (r) { return r.error === '4xx'; }),
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'5xx': _routes.find(function (r) { return r.error === '5xx'; })
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};
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if (!inited) {
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window.addEventListener('click', handle_click);
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window.addEventListener('popstate', handle_popstate);
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// prefetch
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window.addEventListener('touchstart', handle_touchstart_mouseover);
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window.addEventListener('mouseover', handle_touchstart_mouseover);
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inited = true;
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}
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return Promise.resolve().then(function () {
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var _a = window.location, hash = _a.hash, href = _a.href;
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var deep_linked = hash && document.getElementById(hash.slice(1));
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scroll_history[uid] = deep_linked ?
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{ x: 0, y: deep_linked.getBoundingClientRect().top } :
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scroll_state();
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history.replaceState({ id: uid }, '', href);
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var target = select_route(new URL(window.location.href));
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return navigate(target, uid);
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});
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}
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function goto(href, opts) {
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if (opts === void 0) { opts = { replaceState: false }; }
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var target = select_route(new URL(href, window.location.href));
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if (target) {
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navigate(target, null);
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if (history)
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history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
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}
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else {
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window.location.href = href;
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}
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}
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function prefetchRoutes(pathnames) {
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if (!routes)
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throw new Error("You must call init() first");
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return routes
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.filter(function (route) {
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if (!pathnames)
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return true;
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return pathnames.some(function (pathname) {
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return route.error
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? route.error === pathname
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: route.pattern.test(pathname);
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});
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})
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.reduce(function (promise, route) {
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return promise.then(route.load);
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}, Promise.resolve());
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}
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export { component, prefetch, init, goto, prefetchRoutes, prefetchRoutes as preloadRoutes };
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