Ecosyste.ms: Packages

An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

npmjs.org "dynamic" keyword

calccolumncount 1.0.0
Dynamically calculate the perfect column count for each row for given col-count, target and min ...
1 version - Latest release: over 3 years ago - 1 dependent package - 135 downloads last month - 0 stars on GitHub - 1 maintainer
react-image-designer 1.2.1
Design dynamic, progressively loaded images with React.
25 versions - Latest release: over 4 years ago - 2 dependent packages - 1 dependent repositories - 46 downloads last month - 1 stars on GitHub - 1 maintainer
react-dynamic-route 0.1.2
Load react component dynamically based on url path
22 versions - Latest release: over 3 years ago - 1 dependent package - 2 dependent repositories - 5 downloads last month - 0 stars on GitHub - 1 maintainer
dvl 2.0.0
A framework for building highly interactive user interfaces and data visualizations dynamically w...
2 versions - Latest release: over 7 years ago - 1 dependent package - 1 dependent repositories - 5 downloads last month - 129 stars on GitHub - 1 maintainer
@gisgo/dynamic-form 1.0.1
This Angular library make form creation easy.
1 version - Latest release: over 2 years ago - 1 dependent package - 3 downloads last month - 1 maintainer
@duality-solutions/bitcore-p2p-dynamic 1.1.9
Interface to the Dynamic P2P network for Bitcore
4 versions - Latest release: over 4 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 1 maintainer
react-simple-async-import 2.0.0
A simple composer for asynchronously importing a Component using webpack's `import()`
2 versions - Latest release: almost 5 years ago - 1 dependent package - 1 dependent repositories - 13 downloads last month - 2 stars on GitHub - 1 maintainer
@paraboly/pwc-dynamic-form 6.3.2
Generate HTML forms from JSON configuration.
44 versions - Latest release: over 4 years ago - 2 dependent packages - 2 dependent repositories - 146 downloads last month - 1 stars on GitHub - 1 maintainer
table-generator 2.1.0
configurable auto table
4 versions - Latest release: over 6 years ago - 1 dependent package - 1 dependent repositories - 12 downloads last month - 1 maintainer
port-type 0.2.1 💰
Categorize port numbers by semantics.
8 versions - Latest release: over 7 years ago - 1 dependent package - 1 dependent repositories - 5 downloads last month - 0 stars on GitHub - 1 maintainer
knockout-bind-html 1.1.0
A custom binding for KnockoutJS that will dynamically present the specified HTML, like the standa...
1 version - Latest release: about 8 years ago - 1 dependent package - 1 dependent repositories - 6 downloads last month - 6 stars on GitHub - 1 maintainer
Top 3.5% on npmjs.org
vue-deepset 0.6.3
Deep set Vue.js objects
16 versions - Latest release: over 6 years ago - 19 dependent packages - 36 dependent repositories - 4.53 thousand downloads last month - 92 stars on GitHub - 1 maintainer
@tdm/angular-forms-mapper 1.0.0-alpha.5
Dynamic forms using Typed data models (@tdm).
5 versions - Latest release: about 7 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 11 stars on GitHub - 2 maintainers
generatepath 1.0.0
Generate dynamic paths from string
1 version - Latest release: over 2 years ago - 2 dependent packages - 40 downloads last month - 1 stars on GitHub - 1 maintainer
protractor-parallel-instances 1.2.1
Node package to create protractor browser objects on the fly
21 versions - Latest release: over 5 years ago - 1 dependent package - 3 dependent repositories - 194 downloads last month - 1 stars on GitHub - 1 maintainer
sprouter 0.0.1
Simple dynamic routing for expressjs
1 version - Latest release: over 10 years ago - 2 dependent repositories - 5 downloads last month - 1 stars on GitHub - 1 maintainer
dynamic-smart-table-react 1.0.1
A simple dynamic react table
1 version - Latest release: almost 3 years ago - 1 dependent package - 3 downloads last month - 2 stars on GitHub - 2 maintainers
@kraken97/angular-form 0.0.2
fork of Teradata UI Platform Dynamic Forms Module without dependencies
2 versions - Latest release: over 7 years ago - 1 dependent package - 1 dependent repositories - 3 downloads last month - 1 stars on GitHub - 1 maintainer
translator-helper-dustjs 2.0.5
A simple helper for dustJs to load dynamic translations, based on https://github.com/mikesparr/Kr...
8 versions - Latest release: about 8 years ago - 1 dependent repositories - 7 downloads last month - 1 stars on GitHub - 1 maintainer
angular-dynamic-attrs-directive 0.0.0
Angular dynamic attributes directive
1 version - Latest release: over 8 years ago - 2 dependent packages - 1 dependent repositories - 3 downloads last month - 1 stars on GitHub - 1 maintainer
@dynaconfig/envfile 2.0.0
A dynamic configuration library using *.env files
5 versions - Latest release: almost 3 years ago - 1 dependent package - 6 downloads last month - 0 stars on GitHub - 1 maintainer
json-form-html
A library for generating dynamic forms based on JSON configuration in Angular
2 versions - 73 downloads last month - 0 stars on GitHub - 1 maintainer
j-ng2-table 0.0.14
"j-ng2-table is an open source table library designed for angular 2 that supports a lot of featur...
4 versions - Latest release: over 7 years ago - 2 dependent packages - 1 dependent repositories - 11 downloads last month - 1 stars on GitHub - 1 maintainer
verlet-constraint 1.1.0
a single constraint, useful in a verlet system
4 versions - Latest release: almost 8 years ago - 1 dependent package - 9 dependent repositories - 19 downloads last month - 5 stars on GitHub - 2 maintainers
@anxing131/openid-client 4.9.0 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
1 version - Latest release: over 2 years ago - 3 dependent packages - 4 downloads last month - 1,746 stars on GitHub - 1 maintainer
@privoro/openid-client 1.20.1 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js servers, supports passportjs
2 versions - Latest release: about 6 years ago - 1 dependent package - 1 dependent repositories - 7 downloads last month - 1,746 stars on GitHub - 1 maintainer
Top 0.8% on npmjs.org
openid-client 5.6.5 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
180 versions - Latest release: 3 months ago - 515 dependent packages - 22,658 dependent repositories - 9.07 million downloads last month - 1,746 stars on GitHub - 1 maintainer
@definitelynotaworkaccount/openid-client 4.7.5 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
1 version - Latest release: over 2 years ago - 1 dependent package - 6 downloads last month - 1,745 stars on GitHub - 1 maintainer
@circuitly/openid-client 5.4.3 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
1 version - Latest release: 10 months ago - 5 downloads last month - 1,736 stars on GitHub - 1 maintainer
@scherer.adi/openid-client 5.4.3 removed 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
1 version - Latest release: 10 months ago - 1,567 stars on GitHub - 1 maintainer
openid-client-kingfisher 1.0.1 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js servers, supports passportjs...
2 versions - Latest release: over 5 years ago - 1 dependent package - 1 dependent repositories - 6 downloads last month - 1,745 stars on GitHub - 1 maintainer
openid-client-any-engine 5.1.9 💰
Re-publish of openid-client that allows any Node.js version above 12.19.0
2 versions - Latest release: almost 2 years ago - 1 dependent package - 6 downloads last month - 1,745 stars on GitHub - 1 maintainer
baku-openid-client 5.4.0 💰
OpenID Connect Relying Party (RP, Client) implementation for Node.js runtime, supports passportjs
1 version - Latest release: over 1 year ago - 6 downloads last month - 1,745 stars on GitHub - 1 maintainer
dynamic-factor 1.0.3
Calculate dynamic factor based on TTL
4 versions - Latest release: almost 3 years ago - 1 dependent package - 1 dependent repositories - 8 downloads last month - 0 stars on GitHub - 1 maintainer
niceform-hook 1.0.0-beta.2
Dynamic workhorse for form in react
8 versions - Latest release: 16 days ago - 499 downloads last month - 0 stars on GitHub - 1 maintainer
device-status-component 0.0.4
testing for dynamic components
4 versions - Latest release: almost 7 years ago - 1 dependent package - 1 dependent repositories - 7 downloads last month - 1 maintainer
@tuban/dmens 2.0.2
This is dynamic RESTful api server, using nodejs expressjs and mongodb. dynamiclly create schemas...
12 versions - Latest release: 6 months ago - 1 dependent package - 15 downloads last month - 2 stars on GitHub - 1 maintainer
@uat/dvk 0.0.5
A set of tools for building dynamic Angular components and directives
5 versions - Latest release: almost 6 years ago - 2 dependent packages - 1 dependent repositories - 4 downloads last month - 10 stars on GitHub - 1 maintainer
@mill3-packages/barba-scripts 0.2.2
Helper that manage your scripts dependencies during Barba.js transitions
12 versions - Latest release: almost 3 years ago - 1 dependent package - 8 downloads last month - 4 stars on GitHub - 2 maintainers
esri-leaflet-dynamic-tilelayer 0.7.33 💰
Tiled dynamic layer plugin for esri-leaflet
4 versions - Latest release: almost 9 years ago - 1 dependent package - 1 dependent repositories - 46 downloads last month - 1 stars on GitHub - 1 maintainer
dynamic-text-anchors 1.5.7
Dynamic Text Anchors
30 versions - Latest release: 2 months ago - 106 downloads last month - 1 maintainer
scorpio 0.3.0
JavaScript stylesheets
8 versions - Latest release: over 7 years ago - 1 dependent repositories - 7 downloads last month - 1 maintainer
Top 3.2% on npmjs.org
@ngneat/overview 6.0.0 💰
The Template for Success in Template Management
28 versions - Latest release: 6 months ago - 11 dependent packages - 256 dependent repositories - 98.5 thousand downloads last month - 108 stars on GitHub - 3 maintainers
json-form-mat
A library for generating dynamic forms based on JSON configuration in Angular
2 versions - 70 downloads last month - 0 stars on GitHub - 1 maintainer
likeaboss 0.1.4
export for nodejs or web like a boss, easy, fast, & tiny.
5 versions - Latest release: about 7 years ago - 9 dependent packages - 4 dependent repositories - 29 downloads last month - 0 stars on GitHub - 1 maintainer
ddns-webapp 1.0.0
Frontend for Daplie DNS
1 version - Latest release: almost 8 years ago - 2 dependent packages - 1 dependent repositories - 23 downloads last month - 1 maintainer
Top 4.5% on npmjs.org
babel-plugin-module-rewrite 0.2.0
Babel plugin to dynamically rewrite the path in require() and ES6 import
6 versions - Latest release: almost 7 years ago - 40 dependent packages - 13 dependent repositories - 107 thousand downloads last month - 11 stars on GitHub - 1 maintainer
babel-plugin-module-rewrite-plus-exports 0.1.2
Babel plugin to dynamically rewrite the path in require() and ES6 import
1 version - Latest release: about 7 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 11 stars on GitHub - 1 maintainer
babel-plugin-dynamic-import-node-and-webpack 1.0.1
Transpile `import()` to support both deferred `require()` for node and `require.ensure` for Webpack
2 versions - Latest release: almost 4 years ago - 1 dependent package - 7 downloads last month - 1 stars on GitHub - 1 maintainer
loads-css 1.0.0
injects a link tag to dynamically load css
1 version - Latest release: over 9 years ago - 3 dependent packages - 4 dependent repositories - 19 downloads last month - 2 stars on GitHub - 1 maintainer
Top 6.9% on npmjs.org
ngx-dynamic-hooks 2.1.1
Automatically insert live Angular components into a dynamic string of content (based on their sel...
28 versions - Latest release: about 2 months ago - 1 dependent package - 4 dependent repositories - 11.7 thousand downloads last month - 111 stars on GitHub - 1 maintainer
@hqjs/babel-plugin-patch-angular-fesm5-compiler 0.0.2
Patch angular dynamic compiler to work without bundling
2 versions - Latest release: about 4 years ago - 3 dependent packages - 2 dependent repositories - 7 downloads last month - 0 stars on GitHub - 1 maintainer
@nfzvenyika/dynamic-js-utilities 1.0.1
Reusable javascript code that enables a user to create the following dynamic utilities: Drop down...
2 versions - Latest release: 8 months ago - 4 downloads last month - 0 stars on GitHub - 1 maintainer
Top 6.4% on npmjs.org
react-dynamic-loadable 3.0.0
A higher order component for loading components with dynamic imports.
22 versions - Latest release: almost 3 years ago - 24 dependent packages - 10 dependent repositories - 717 downloads last month - 7 stars on GitHub - 1 maintainer
dyncol 0.2.2 💰
A tool to convert JSON schemas to dynamic column queries (like the ones from MariaDB)
10 versions - Latest release: over 7 years ago - 1 dependent package - 1 dependent repositories - 19 downloads last month - 4 stars on GitHub - 1 maintainer
react-native-draggable-dynamic-flatlist-2 2.0.0-alpha1
A react native component that lets you drag and drop dynamic items of a FlatList.
1 version - Latest release: over 1 year ago - 1 dependent package - 5 downloads last month - 0 stars on GitHub - 1 maintainer
@imgix/angular 1.1.11
A library that provides custom components for integrating imgix into Angular applications
20 versions - Latest release: over 1 year ago - 1 dependent package - 3 dependent repositories - 168 downloads last month - 4 stars on GitHub - 14 maintainers
@logicsoftware/redux-dynamic-modules 5.0.1
Modularize the redux app by dynamically loading reducers, state and sagas
1 version - Latest release: almost 5 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 1,065 stars on GitHub - 4 maintainers
zoia-table 1.0.8
Dynamic Table Component for React
9 versions - Latest release: over 5 years ago - 1 dependent package - 1 dependent repositories - 7 downloads last month - 0 stars on GitHub - 1 maintainer
module-loader-tool 0.3.7
Module loader tool for dynamic load UMD modules
26 versions - Latest release: almost 4 years ago - 2 dependent packages - 1 dependent repositories - 7 downloads last month - 1 maintainer
angular-painless-title 0.1.5
A simple and easy to use (painless) module to manipulate titles in angular apps.
6 versions - Latest release: about 9 years ago - 2 dependent packages - 1 dependent repositories - 23 downloads last month - 2 stars on GitHub - 1 maintainer
vite-plugin-dynamic-require-import 0.0.1
Converts require dynamic loading to import dynamic loading
2 versions - Latest release: about 2 years ago - 7 dependent packages - 1 dependent repositories - 11 downloads last month - 1 stars on GitHub - 1 maintainer
proxy-tree 0.0.2
Write dynamic API wrappers with trees of Proxy
2 versions - Latest release: almost 7 years ago - 1 dependent package - 1 dependent repositories - 8 downloads last month - 4 stars on GitHub - 1 maintainer
@dynaconfig/toml 2.0.0
A dynamic configuration library using *.toml files
1 version - Latest release: almost 3 years ago - 1 dependent package - 57 downloads last month - 0 stars on GitHub - 1 maintainer
@matthew-p/docker-server 1.5.6
Universal docker server, Nginx, Node, MySql, Redis
23 versions - Latest release: over 2 years ago - 1 dependent package - 1 dependent repositories - 22 downloads last month - 11 stars on GitHub - 1 maintainer
Top 9.2% on npmjs.org
als-simple-css 9.1.0
Simplify building CSS styles with JS.
53 versions - Latest release: 2 months ago - 5 dependent packages - 1 dependent repositories - 54 downloads last month - 1 maintainer
dynamic-string 0.1.2
Reuse string interpolation in JavaScript. `dynamic-string` is a a curried dynamic template string.
9 versions - Latest release: over 2 years ago - 1 dependent package - 2 dependent repositories - 127 downloads last month - 8 stars on GitHub - 1 maintainer
dynassets 1.2.2
Dynassets creates a simple server to serve static files like JavaScript, CSS etc. with specific d...
10 versions - Latest release: almost 5 years ago - 1 dependent package - 1 dependent repositories - 5 downloads last month - 0 stars on GitHub - 1 maintainer
dynamic-truncator 1.0.5
A Lightweight cross-browser helper library that enables you to truncate text by the dimensions of...
6 versions - Latest release: almost 7 years ago - 1 dependent package - 1 dependent repositories - 12 downloads last month - 3 stars on GitHub - 1 maintainer
Top 4.7% on npmjs.org
types.js 2.0.1 💰
A tiny and fast dynamic type checker/enforcer library
48 versions - Latest release: 7 months ago - 27 dependent packages - 37 dependent repositories - 2.52 thousand downloads last month - 66 stars on GitHub - 1 maintainer
react-smart-table-component 1.0.7
A smart and fully dynamic React Component purely build with TypeScript which has inbuilt function...
8 versions - Latest release: 12 months ago - 67 downloads last month - 5 stars on GitHub - 2 maintainers
@pilusonoka/ngx-dynamic-form-builder 1.12.1
FormBuilder + class-transformer + class-validator-multi-lang = dynamic form group builder for Ang...
2 versions - Latest release: over 2 years ago - 1 dependent package - 6 downloads last month - 116 stars on GitHub - 1 maintainer
vconf-loader 0.0.4
Small library that targets to dynamically load variables (mostly as configs) from files basing on...
4 versions - Latest release: almost 2 years ago - 30 downloads last month - 0 stars on GitHub - 1 maintainer
Top 8.7% on npmjs.org
nnode 0.3.3
So nice, you'd introduce it to your parents.
18 versions - Latest release: about 5 years ago - 7 dependent packages - 24 dependent repositories - 34 downloads last month - 10 stars on GitHub - 1 maintainer
dynaform-ng 0.1.0
Angular and primeng based dynamic forms component
8 versions - Latest release: about 6 years ago - 1 dependent package - 1 dependent repositories - 12 downloads last month - 1 stars on GitHub - 1 maintainer
react-config-forms-android 1.0.0
Android renderer for react-config-forms-base npm package.
1 version - Latest release: over 6 years ago - 1 dependent package - 1 dependent repositories - 6 downloads last month - 0 stars on GitHub - 1 maintainer
dynamic-pdf-certificate 1.0.6
This library generates certificates dynamically by filling pdf forms, usefull for courses and wor...
7 versions - Latest release: 9 months ago - 194 downloads last month - 1 stars on GitHub - 1 maintainer
react-native-super-hero 0.3.1
🤘 A super duper easy hero unit react-native component with support for dynamic image, dynamic siz...
1 version - Latest release: over 6 years ago - 2 dependent packages - 1 dependent repositories - 11 downloads last month - 2 stars on GitHub - 1 maintainer
local-json-mongodb 0.0.2
mongodb storage method for local-json.
2 versions - Latest release: over 9 years ago - 1 dependent package - 1 dependent repositories - 9 downloads last month - 0 stars on GitHub - 1 maintainer
jade-render-dynamic 0.1.0
Enables support for dynamic render for Jade
1 version - Latest release: about 9 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 0 stars on GitHub - 1 maintainer
dynamic-react-components 1.0.18-beta
React library provides multiple types of components (beta version)
7 versions - Latest release: about 1 year ago - 1 dependent package - 1 dependent repositories - 8 downloads last month - 5 stars on GitHub - 1 maintainer
Top 9.9% on npmjs.org
@logicsoftware/redux-dynamic-modules-react 5.0.1
Modularize the redux app by dynamically loading reducers, state and sagas
1 version - Latest release: almost 5 years ago - 2 dependent packages - 1 dependent repositories - 5 downloads last month - 1,065 stars on GitHub - 4 maintainers
ds-and-algos-in-js 1.0.0
Implementation of traditional data structures and algorithms and some of the algorithmic problems...
1 version - Latest release: almost 8 years ago - 2 dependent packages - 1 dependent repositories - 3 downloads last month - 0 stars on GitHub - 1 maintainer
Top 1.6% on npmjs.org
v-runtime-template 1.10.0 💰
Create Vue components by compiling templates on the fly
17 versions - Latest release: almost 5 years ago - 80 dependent packages - 1,076 dependent repositories - 28.9 thousand downloads last month - 606 stars on GitHub - 1 maintainer
Top 3.1% on npmjs.org
ngx-owl-carousel 2.0.7
An angular (2 or 4) wrapper for jquery owl carousel library with dynamic carousel item change det...
30 versions - Latest release: over 6 years ago - 4 dependent packages - 836 dependent repositories - 16.1 thousand downloads last month - 70 stars on GitHub - 1 maintainer
@fit2cloud-ui/vue-virtual-tree 1.0.1
基于Element-ui和vue-virtual-scroller实现的Vue2版本的虚拟树形组件,支持固定高度和动态高度两种模式
2 versions - Latest release: 7 months ago - 42 downloads last month - 1 stars on GitHub - 2 maintainers
temp-require 1.0.0
A utility for Node.js to require npm packages dynamically. If the package is not found, it is ins...
1 version - Latest release: 12 months ago - 4 downloads last month - 1 maintainer
dynamic-file 0.2.1
Load JS or CSS files dynamically and return a promise after loading,Loading JS or CSS files dynam...
8 versions - Latest release: about 5 years ago - 1 dependent package - 1 dependent repositories - 24 downloads last month - 18 stars on GitHub - 1 maintainer
djson 2.0.2
Dynamic JSON modification tookit
6 versions - Latest release: over 8 years ago - 4 dependent packages - 3 dependent repositories - 99 downloads last month - 0 stars on GitHub - 1 maintainer
addel 1.3.2
addel is a simple and lightweight jQuery plugin for powering UIs that enable dynamic addition and...
6 versions - Latest release: about 7 years ago - 2 dependent packages - 1 dependent repositories - 49 downloads last month - 50 stars on GitHub - 1 maintainer
dfn 0.1.0
Dynamic Function Definition, using map pattern guard something.
2 versions - Latest release: about 8 years ago - 1 dependent package - 1 dependent repositories - 6 downloads last month - 1 stars on GitHub - 1 maintainer
controlled-rising-skyline 1.1.0
This library provides a rising skyline chart with an horizontal control panel control. This widge...
22 versions - Latest release: over 2 years ago - 1 dependent package - 1 dependent repositories - 5 downloads last month - 0 stars on GitHub - 1 maintainer
Top 9.1% on npmjs.org
rollup-plugin-import-manager 0.6.4
A rollup plugin to add, modify, and remove imports (cjs/es6/dynamic)
28 versions - Latest release: 11 months ago - 6 dependent packages - 4 dependent repositories - 127 downloads last month - 3 stars on GitHub - 1 maintainer
react-flat-treeview 1.0.3
Visual representation of a dynamically loaded tree with very long, flat branches
4 versions - Latest release: almost 7 years ago - 1 dependent package - 1 dependent repositories - 17 downloads last month - 0 stars on GitHub - 1 maintainer
dynamic-table-vue3 1.0.6
Componente dinámico de Vue que genera una tabla dinámica
7 versions - Latest release: 3 months ago - 15 downloads last month - 1 stars on GitHub - 1 maintainer
dynamiceventlistener 1.0.0 💰
Add event listeners to dynamic elements
1 version - Latest release: almost 9 years ago - 1 dependent package - 1 dependent repositories - 4 downloads last month - 3 stars on GitHub - 1 maintainer
rich-autocomplete 0.1.0
A simple yet powerful autocomplete jQuery plugin.
1 version - Latest release: about 8 years ago - 1 dependent repositories - 250 downloads last month - 5 stars on GitHub - 1 maintainer
stimulus-resolvers 1.0.4
Load Stimulus controllers lazily and/or conditionally
5 versions - Latest release: over 2 years ago - 107 downloads last month - 3 stars on GitHub - 1 maintainer
log-err 1.0.0
Lightweight node module for extensive logging in nodejs. It includes dynamic reconfiguration of t...
1 version - Latest release: almost 7 years ago - 2 dependent packages - 1 dependent repositories - 4 downloads last month - 2 stars on GitHub - 1 maintainer
gluebert 0.2.0
gluebert.js is a tiny helper orchestrating interactive html elements with on demand dynamic impor...
18 versions - Latest release: about 6 years ago - 1 dependent package - 1 dependent repositories - 32 downloads last month - 190 stars on GitHub - 1 maintainer