ast-contains-only-empty-space^1.9.16

Returns Boolean depending if passed AST contain only empty space

Install globally, via npm

npm i ast-contains-only-empty-space

The default is exported, so instead of "containsOnlyEmptySpace" below, you can name the consumed function however you want.

Consume via a require():

const containsOnlyEmptySpace = require("ast-contains-only-empty-space");

or as an ES Module:

import containsOnlyEmptySpace from "ast-contains-only-empty-space";

Install as a script, via CDN

Put this in your HTML:

<script src="https://cdn.jsdelivr.net/npm/ast-contains-only-empty-space/dist/ast-contains-only-empty-space.umd.js">

Then, you’ll get a global variable astContainsOnlyEmptySpace in your Global object and you consume it like this:

const containsOnlyEmptySpace = astContainsOnlyEmptySpace;

This containsOnlyEmptySpace is your main function. See its API in the main section.

Trivia

This program has 30 assertions in its unit tests. That's less than all unit test assertions' median (52) and less than geometric mean (71).

In monorepo, 3 other packages consume this package.

§ Quick Take

import { strict as assert } from "assert";
import containsOnlyEmptySpace from "ast-contains-only-empty-space";

assert.equal(
  containsOnlyEmptySpace({
    a: [
      {
        x: {
          y: [
            {
              z: ["\n"],
            },
          ],
        },
      },
    ],
    b: ["\t\t\t  "],
    c: ["\n \n\n"],
    d: ["\t   "],
  }),
  true
);

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§ Examples

program example: More Examples

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§ Purpose

Working with parsed HTML is always a battle against the white space. This program tells if given data structure is empty — containing only empty space or really empty.

By the way, weird things which don't belong to parsed structures (functions, for example) will yield a result false.

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