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When using Summarizer, you may find that the full text of the web page obtained from certain URLs does not meet your expectations. You can choose to use a custom function to override the default web content acquisition method. Inside Summarizer, we use Sval to execute your custom function.

Please:

1. Make sure there is only one function in the outermost layer
2. The function needs to have a return value at the end

For example, for the Hacker News website, you can customize the function like this:

function getMarkdown() {
 const list = []
 const nodes = document.querySelectorAll(".athing")
 nodes.forEach((node) => {
 let title = node.querySelector(".titleline"),
 link = node.querySelector("a")
 title &&
 link &&
 list.push({
 title: title.textContent || "",
 link: link.href
 })
 })
 const result = list
 .map((item) => `- [${item.title}](${item.link})`)
 .join("\n")
 return `# Hacker News\n` + result
}

In addition, starting from version 1.1.0, we have exposed a TurndownService on the window object so that you can easily convert HTML to markdown. You can get it through window.__summarizer_turndown in the function. For the specific configuration of TurndownService, please see turndown.

function getMarkdown() {
const TurndownService = window.__summarizer_turndown
const service = new TurndownService()
return service.turndown("<h1>Hello world!</h1>")
}

You can also share your custom rules here. Of course, you can also refer to other people's rules.

使用 Summarizer 时,您可能觉得某些网址下获取的网页全文内容不符合您的预期,您可以选择自定义函数的方式来覆盖默认的获取方式。在 Summarizer 内部,我们使用 Sval 来执行您的自定义函数。

请:

1. 务必保证最外层只有一个函数
2. 函数最后需要有一个返回值

比如,对于 Hacker News 网站,您可以这样自定义函数:

function getMarkdown() {
 const list = []
 const nodes = document.querySelectorAll(".athing")
 nodes.forEach((node) => {
 let title = node.querySelector(".titleline"),
 link = node.querySelector("a")
 title &&
 link &&
 list.push({
 title: title.textContent || "",
 link: link.href
 })
 })
 const result = list
 .map((item) => `- [${item.title}](${item.link})`)
 .join("\n")
 return `# Hacker News\n` + result
}

另外,1.1.0 版本开始,我们在 window 对象上暴露了一个 TurndownService 以便您轻松将 html 转为 markdown,您可以在函数中通过 window.__summarizer_turndown 获取它,关于 TurndownService 的具体配置请见 turndown。

function getMarkdown() {
 const TurndownService = window.__summarizer_turndown
 const service = new TurndownService()
 return service.turndown("<h1>Hello world!</h1>")
}

您还可以在这里分享您的自定义规则。当然,也可以参考别人的规则。