Is there a convenient HTML parser that is compatible with Nativescript?

I have tested various libraries like Jquery, Parse5, and JsDom, but unfortunately they are not compatible with nativescript. Jquery relies on the DOM, while Parse5 and JsDom require Node.js which is currently not supported by nativescript. I am in need of an HTML parser only; is it feasible to incorporate jquery into nativescript as an HTML parser? If so, how can I achieve this? If not, is there a user-friendly HTML parser available for use in Nativescript (With Angular2 + TypeScript)?

Here are some details about my project: I am building a mobile app for Moodle using nativescript. The app interacts with Moodle through its REST API, and receives HTML string content. Therefore, I require an HTML parser to extract information from these HTML strings.

For instance, when I send a "mod_quiz_get_attempt_data" request to Moodle, I receive a JSON response like the following:

{"questions": [ { "slot": 1, "type": "multichoice", "page": 0, "html": "Html string here. Can be very complex. Unfortunately, stackoverflow does not allow posting HTML strings.", } ] }

The necessary data is within the "html" section, which contains the HTML string. Since Moodle is a third-party platform, I prefer handling this parsing within my app.

Mentioned users: @Marek Maszay, @Emil Oberg

@Emil Oberg, I attempted to use Cheerio but faced issues. Cheerio depends on htmlparser2, which also requires Node.js.

javascriptjquerytypescriptnativescripthtml-parser

Answer №1

After exploring various libraries, Cheerio stands out as the ideal choice for your needs within a non-DOM environment. It serves as an adaptation of core jQuery tailored for scenarios such as NativeScript applications or server-side operations.

Typically, parsing HTML is not a common requirement in NativeScript apps. With that in mind, what specific task are you aiming to accomplish?

Answer №2

Encountered a comparable issue and addressed it by utilizing nativescript-xml2js.

This tool effectively transforms the HTML structure (tags, attributes) into JSON format and is compatible with Nativescript using Typescript or vanilla JavaScript.

Answer №3

I recently incorporated Cheerio into my Nativescript App with success by following these steps:

- Start by installing npm i <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="0d6e6568687f6462207a647965627879206362696820636c79647b684d3d233f3d233f">[email protected]</a> by Ouyang Yadong(https://github.com/oyyd)
- Also, install buffer using npm
- Add the nativescript-nodeify plugin using tns plugin add nativescript-nodeify
- Make sure to require("nativescript-nodeify") before executing any problematic code 
  This is crucial especially in Angular projects, where you can simply call it in your main.ts file 
  prior to bootstrapping the main application's module.
  
- When loading html with cheerio, use the "_useHtmlParser2: true" option,
  for example: this.$ = this.cheerio.load(siteRequested, { _useHtmlParser2: true }); or 
  const $ = cheerio.load(siteRequested, { _useHtmlParser2: true });

- If fetching html via http, remember to set responseType to text, such as 
  return this.http.get(url, {responseType: 'text'});

Following these instructions, you should be able to seamlessly utilize the library. Hope this explanation proves useful.

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