html-table-patcher^2.0.16

§ Quick Take

import { strict as assert } from "assert";
import { patcher } from "dist/html-table-patcher.esm";

assert.equal(
  patcher(
    `<table>
{% if customer.details.hasAccount %}
<tr>
  <td>
    variation #1
  </td>
</tr>
{% else %}
<tr>
  <td>
    variation #2
  </td>
</tr>
{% endif %}
</table>`
  ).result,
  `<table>

<tr>
  <td>
    {% if customer.details.hasAccount %}
  </td>
</tr>

<tr>
  <td>
    variation #1
  </td>
</tr>

<tr>
  <td>
    {% else %}
  </td>
</tr>

<tr>
  <td>
    variation #2
  </td>
</tr>

<tr>
  <td>
    {% endif %}
  </td>
</tr>

</table>`
);

§ Idea

When we make email templates, sooner or later, we have to add conditional logic around table tags. If this, show that row, if that, show another column, and so on. As a result, when we try to preview HTML in the browser, all the logic is placed at the wrong place, at the top, making it hard to visually QA.

This program patches table structures, creating cells as needed and placing the code in those cells so that when you preview, templating literals are in the correct places.

It is another helper tool to QA email campaigns.

§ API

This package exports a plain object with three keys: { patcher, defaults, version }.

The first-one has a value which is the main function. The second one is the defaults (plain) object. The third one is the version taken straight from package.json

§ patcher() API - Input

{ patcher, defaults, version }(str, [opts])

§ patcher() API - Output

It returns a plain object:

For example,

{
  result: `<table>
  <tr>
    <td>
      foo
    </td>
  </tr>
  <tr>
    <td>
      bar
    </td>
  </tr>
</table>`
}

§ patcher() API - Options

Put options under function's second input argument, in a plain object, as per defaults:

import { patcher, defaults, version } from "html-table-patcher";
const result = patcher("<table>1<tr><td>zzz</td></tr></table>", {
  // <---- options object
  cssStylesContent: "",
  alwaysCenter: false,
});

Here's the options object's API:

§ The algorithm

We parse using codsen-parser then traverse using ast-monkey-traverse-with-lookahead and record what needs to be amended using ranges-push and finally, apply all changes in one go using ranges-apply.

§ Using the GUI tap

Git clone the repo to your SSD.

Then, cd into the root of this package (where its pacakge.json is).

Then, serve  the folder to localhost server.

If you open the folder /tap/ in browser, you'll get mini GUI application which is driven by Vue (local copy, no Internet needed) and also by local code of the pacher.

§ Changelog

See it in the monorepo , on GitLab.

§ Licence

MIT 

Copyright © 2010–2020 Roy Revelt and other contributors