我知道,我已经看到了很多相同的问题,但无法得到完整的答案。
因此,我有一个类似这样的数组(简化为演示):
// links.js
const links = [
{
name: 'Page 1',
path: '/page-1'
},
{
name: 'Page-2',
subpages:[
{ name: 'Page (2-1)', path: '/page-2-1' },
{ name: 'Page (2-2)', path: '/page-2-2' }
]
},
{
name: 'Page 3',
path: '/page-3'
},
{
name: 'Page 4',
subpages:[
{ name: 'Page (4-1)', path: '/page-4-1' },
{ name: 'Page (4-2)', path: '/page-4-2' },
{ name: 'Page (4-3)', path: '/page-4-3' }
]
},
...
]
export default links上面的对象是菜单链接数据,我将它们呈现在屏幕上,以便在页面之间运行,而subpages则是下拉的。它们要么是path,要么是subpages,而不是两者都有,而且可能有更多的嵌套。
有两个任务,我需要帮助。
第一:
我网站的每一页都有一个标题,其中大多数都与上面所示的name属性相同。
因此,我在每个页面上都呈现了一个函数,该函数返回当前路由的路径名,所以我想要的是通过links映射并获得匹配path的name。
例如,如果我给出/page-4-1,我想要获得匹配路径的name属性,即name: Page 4
第二
这一次,它有点像面包屑,如果我给['/page-1', '/page-2-1', '/page-4-2'],我想得到:
[
{
name: 'Page 1',
path: '/page-1'
},
{
name: 'Page (2-1)',
path: '/page-2-1'
},
{
name: 'Page (4-2)',
path: '/page-4-2'
},
]在某些情况下,可能没有匹配的结果,在这种情况下,我想插入{name: document.body.title, path: null}
我试过了
我在用Nextjs
import { useRouter } from 'next/router'
import links from 'links.js'
const router = useRouter()
const splitted = router.asPath
.split('/')
.filter(
(sp) =>
sp !== ''
)
cost ready = []
for (let sp = 0; sp < splitted.length; sp++) {
for (let ln = 0; ln < links.length; ln++) {
if (links[ln].path) {
if (links[ln].path === '/' + splitted[sp]) {
ready.push(links[ln])
}
} else {
for (let sb = 0; sb < links[ln].sublinks.length; sb++) {
if (links[ln].sublinks[sb].path === '/' + splitted[sp]) {
ready.push(links[ln].sublinks[sb])
}
}
}
}
}这在一定程度上是可行的,但很麻烦,map、filter和find应该有一个更好的方法,但我对它们的尝试无法成功。
提前感谢您的帮助!
编辑:
糟了!我的问题是一个很大的错误,links对象只包含path键,而不是条件path和link。
发布于 2021-12-25 15:03:14
const links = [
{
name: 'Page 1',
path: '/page-1'
},
{
name: 'Page-2',
subpages:[
{ name: 'Page (2-1)', path: '/page-2-1' },
{ name: 'Page (2-2)', path: '/page-2-2' }
]
},
{
name: 'Page 3',
path: '/page-3'
},
{
name: 'Page 4',
subpages:[
{ name: 'Page (4-1)', path: '/page-4-1' },
{ name: 'Page (4-2)', path: '/page-4-2' },
{ name: 'Page (4-3)', path: '/page-4-3' }
]
},
];
const findPathObj = (path,links) => {
let result = null;
for(const item of links){
if(item.path == path) return item;
if(item.subpages) result = findPathObj(path, item.subpages)
if(result) break;
}
return result;
}
const findPageName = (path,links) => findPathObj(path,links)?.name;
const findBreadcrumb = (pathes, links) => pathes.map(path => findPathObj(path,links) || {name: document.title, path: null});
console.log(findPageName('/page-4-1', links));
console.log(findBreadcrumb(['/page-1', '/page-2-1', '/page-4-2'],links))
发布于 2021-12-25 14:47:54
关于您的第一个问题,请尝试以下方法
const links = [
{
name: "Page 1",
path: "/page-1",
},
{
name: "Page-2",
subpages: [
{ name: "Page (2-1)", path: "/page-2-1" },
{ name: "Page (2-2)", path: "/page-2-2" },
],
},
{
name: "Page 3",
link: "/page-3",
},
{
name: "Page 4",
subpages: [
{ name: "Page (4-1)", link: "/page-4-1" },
{ name: "Page (4-2)", link: "/page-4-2" },
{ name: "Page (4-3)", link: "/page-4-3" },
],
},
];
// Find out function
// Level must 0 at beginning
function findout(pages, search, level = 0) {
for (const page of pages) {
if (page.link === search || page.path === search) {
if (level === 0) {
return page.name;
}
return true;
}
if (Array.isArray(page.subpages)) {
if (findout(page.subpages, search, level + 1)) {
if (level === 0) {
return page.name;
}
return true;
}
}
}
return false;
}
console.log(findout(links, "/page-4-3"))
我建议的第二个问题是
const links = [
{
name: "Page 1",
path: "/page-1",
},
{
name: "Page-2",
subpages: [
{ name: "Page (2-1)", path: "/page-2-1" },
{ name: "Page (2-2)", path: "/page-2-2" },
],
},
{
name: "Page 3",
link: "/page-3",
},
{
name: "Page 4",
subpages: [
{ name: "Page (4-1)", link: "/page-4-1" },
{ name: "Page (4-2)", link: "/page-4-2" },
{ name: "Page (4-3)", link: "/page-4-3" },
],
},
];
function findout2(pages, search, result = []) {
for (const page of pages) {
if (typeof page.link === "string" && search.includes(page.link)) {
result.push({ name: page.name, link: page.link });
} else if (typeof page.path === "string" && search.includes(page.path)) {
result.push({ name: page.name, path: page.path });
}
if (Array.isArray(page.subpages)){
findout2(page.subpages, search, result)
}
}
return result
}
console.log(findout2(links, ['/page-1', '/page-2-1', '/page-4-2']))
https://stackoverflow.com/questions/70480625
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