npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

feature-filter-geojson

v1.0.0

Published

Creates filtering function for GeoJSON features

Downloads

51

Readme

feature-filter-geojson

Build Status npm

This library is forked from mapbox/feature-filter, but adapted to work with GeoJSON features rather than features from a vector tile. This library implements the semantics specified by the Mapbox GL JS spec.

API

featureFilter(filter)

Given a filter expressed as nested arrays, return a new function that evaluates whether a given feature (with a .properties or .tags property) passes its test.

Parameters

| parameter | type | description | | --------- | ----- | ---------------- | | filter | Array | mapbox gl filter |

Returns Function, filter-evaluating function

Usage

var ff = require('feature-filter');

// will match a feature with class of street_limited,
// AND an admin_level less than or equal to 3,
// that's NOT a polygon.
var filter = [
    "all",
    ["==", "class", "street_limited"],
    ["<=", "admin_level", 3],
    ["!=", "$type", "Polygon"]
]

// will match a feature that has a class of
// wetland OR wetland_noveg.
// ["in", "class", "wetland", "wetland_noveg"]

// testFilter will be a function that returns a boolean
var testFilter = ff(filter);

// Layer feature that you're testing. Must have type
// and properties keys.
var feature = {
    type: 'Feature'
    geometry: {
      type: 'Polygon',
      coordinates: [[...]]
    },
    properties: {
       class: "street_limited"
       admin_level: 1
    }
};

// will return a boolean based on whether the feature matched the filter
return testFilter(feature);