5.9.0 • Public • Published


Build Status npm version

Angular popover component to display a contextual help.

This project is part of easy doc contents (edc).

edc is a simple yet powerful tool for agile-like documentation management.

Learn more at https://www.easydoccontents.com.


Version Angular
5.1.1 v7 - v10
5.2.0 v11
5.3.0 v12
5.4.2 v13
5.5.0 v14
5.6.0 v15
5.7.0 v16
5.8.0 v17
5.9.0 v18


Required dependencies:

How to use


You can import this module with npm by running:

npm install edc-popover-ng --save

Or with yarn:

yarn add edc-popover-ng

Add font-awesome as a dependency

npm install font-awesome --save

In your main style file (e.g. style.less) :

@import "~font-awesome/less/font-awesome.less";


Provide a service implementing PopoverConfigurationHandler

Edc Help module needs a basic configuration.

To provide this configuration, first create a new Service implementing PopoverConfigurationHandler.

Methods to implement are :

Method Return type Description
getPluginId string The identifier of the target plugin documentation export
getHelpPath string The path to edc-help-ng application
getDocPath string The path to exported documentation
getI18nPath string The path to translation json files
getPopoverOptions IEdcPopoverOptions Options for the popover

Example :

import { Injectable } from '@angular/core';
import { EdcPopoverConfiguration, PopoverConfigurationHandler } from 'edc-popover-ng';

export class YourService implements PopoverConfigurationHandler {

  getPluginId(): string {
    return 'edchelp';
  getHelpPath(): string {
    return '/help';
  getDocPath(): string {
    return '/doc';

  getI18nPath(): string {
    return '/doc/my-i18n-directory';

  getPopoverOptions(): IEdcPopoverOptions {
    // return the global scope options. They can be overwritten at component level.
    return {
        placement: 'left'

N.B : The choice to provide a service instead of an object has been made to be more dynamic.

For instance you could inject the Http service in YourService to get configuration from remote (see also : https://aclottan.wordpress.com/2016/12/30/load-configuration-from-external-file/).

Import HelpModule

In your main application module, for example AppModule:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';

// Import edc-popover-ng library elements.
import { HelpModule, PopoverConfigurationHandler } from 'edc-popover-ng';

// Import your service implementing PopoverConfigurationHandler.
import { YourService } from './path.to.your.service';

  declarations: [
  imports: [
    // Specify the edc-help module as an import, and provide service implementing PopoverConfigurationHandler.
      configLoader: {provide: PopoverConfigurationHandler, useClass: YourService}
  providers: [],
  bootstrap: [AppComponent]
export class AppModule { }

You can now use the Help component in your Angular application :

  <edc-help [mainKey]="'my.mainKey'" [subKey]="'my.subkey'" [placement]="'bottom'" [lang]="'en'"></edc-help>

If your application uses more than one documentation

Your application might rely on more than one documentation. You can then specify a custom documentation plugin Id using the optional pluginId attribute in the edc-help component.

  <edc-help [pluginId]="'my.specificPluginId'" [mainKey]="'my.mainKey'" [subKey]="'my.subkey'">edc-help>

Inputs and options

Mandatory inputs

Mandatory inputs or the EdcHelp (see HelpComponent):

Prop Type Description
mainKey string The main key of the contextual help
subKey string The sub key of the contextual help

Optional inputs

Optional inputs for the component:

Input Name Return type Description Default value
pluginId string A different pluginId from the one defined in the main service undefined
lang string The language to use, for labels and contents, identified by the 2 letters from the ISO639-1 standard. Will use documentation's default if no value is provided undefined
options EdcPopoverOptions Options for this popover - will overwrite global options undefined

Available options (EdcPopoverOptions):

Property Type Description Default
icon PopoverIcon Icon settings, see Icon PopoverIcon
failBehavior FailBehavior Icon and popover behavior on error, see Fail Behavior FailBehavior
placement popper.js Placement Popover positioning relatively to the icon bottom
hideOnClick boolean If true, any click outside of the popover will close it (inside too if interactive is false) true
interactive boolean Determine if we can interact with the popover content true
trigger string Event that will trigger the popover: click mouseenter focus click
customClass string class name that will be added to the main popover container undefined
dark boolean Dark mode false
theme string Popover's theme name undefined
displayPopover boolean Show the popover / Go directly to the web help viewer on click true
displaySeparator boolean Show / Hide the separator between header and body true
displayTitle boolean Show / Hide the header containing the title true
displayArticles boolean Show / Hide the articles section true
displayRelatedTopics boolean Show / Hide the related Topics (aka Links) section true
displayTooltip boolean Show / Hide the icon tooltip true
delay `number [number, number]` Delay in milliseconds before showing the popover - if array, delay for opening and closing respectively
animation Animation Animation when opening / closing the popover undefined
appendTo `'parent' Element (() => Element)`


PopoverIcon contains the options for the icon.

Property Type Description Default
class string Class name for the icon. Font awesome icon classes are handled natively 'fa fa-question-circle-o'
url string Image url, size is determined by height, and width properties undefined
height number Image height in pixels (for url images only) 18
width number Image width in pixels (for url images only). Will take height value if none is provided 18

If class property is provided, it will overwrite the default class 'fa fa-question-circle-o'. If url is defined, it will override the class property, even if class is defined.

Fail behavior

If the help content failed to be loaded - or any other error occured, the icon and the popover will look for the FailBehavior options to define their style and content.

There are separate behaviors for the help icon, and the popover itself.

For the help icon when an error occurs, it adds the following css selector.

Behavior Description CSS selector
SHOWN The help icon is shown as usual (default) .edc-help-icon
DISABLED The help icon is greyed out .edc-icon-disabled
HIDDEN The help icon is completely hidden (but stays in DOM to avoid breaking the UI) .edc-icon-hidden
ERROR The help icon is replaced by an exclamation point .edc-icon-error

Default values are in file help.less

For the popover when an error occurs:

  • ERROR_SHOWN An error message is shown in the popover
  • FRIENDLY_MSG A friendly and translated message is shown in the popover
  • NO_POPOVER No popover appears when the help icon is triggered

By default, the icon is SHOWN and the popover is set to FRIENDLY_MSG.




When dark-mode is enabled, the CSS class edc-on-dark is applied to the help icon.


You can customize the popover with CSS classes as described below :

CSS Classes

For more control, the customClass option will add the given class name to the popover container .edc-popover-container. You can then override the main classes.

For example, if you'd like to change the background color of the popover

.my-custom-class {
    background-color: lightgreen;
/* or the title font-size */
.my-custom-class .edc-popover-title {
    font-size: 18px;

Providing your own translations for the popover labels

You can set additional translations (or replace the existing ones) by adding i18n json files to the documentation folder.

Please note that one file is required per language (see file example below), and should be named following the ISO639-1 two letters standards (ie en.json, it.json...).

By default, edc-popover-ng will be looking for the files in [yourDocPath]/popover/i18n/ (*.json), but you can change this path by modifying getI18nPath() in your PopoverConfigurationHandler.

edc-popover-ng comes with English and French translations, and supports up to 36 languages. For the full list, please refer to LANGUAGE_CODES.

JSON file structure

Here is the en.json file used by default:

  "labels": {
  "articles": "Need more...",
  "links": "Related topics",
  "iconAlt": "Help",
  "comingSoon": "Contextual help is coming soon.",
  "errorTitle":  "Error",
  "errors": {
    "failedData": "An error occurred when fetching data !\nCheck the brick keys provided to the EdcHelp component."
  "content": null,
  "url": "",
  "exportId": ""


You can customize the popover with CSS classes as described below :

CSS Classes




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