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#426 侧边栏文章标题默认取front matter的title 

解决issue #426 ，从 front matter 提取 title 作为侧边栏文章的标题，这样可以与文章标题本身是front matter title相对应。如果没有定义front matter title，则使用文件名。
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Northword 2020-12-15 16:23:31 +08:00 committed by GitHub
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theme-vdoing/node_utils/getSidebarData.js
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@ -133,7 +133,12 @@ function mapTocToSidebar (root, collapsable, prefix) {
const contentStr = fs.readFileSync(file, 'utf8') // 读取md文件内容，返回字符串
const { data } = matter(contentStr) // 解析出front matter数据
const permalink = data.permalink || ''
sidebar[order] = [prefix + filename, title, permalink]; // [<路径>, <文件标题>, <永久链接>]
const title2 = data.title || title
if (title2) {
sidebar[order] = [prefix + filename, title2, permalink]; // [<路径>, <front matter.title>, <永久链接>]
} else {
sidebar[order] = [prefix + filename, title, permalink]; // [<路径>, <文件标题>, <永久链接>]
}
// 目录页和永久链接，用于给面包屑提供数据
const pageComponent = data.pageComponent