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Getting started with Angular Tooltip component

This section briefly explains how to create a simple Tooltip component and configure its available functionalities in angular.

Dependencies

The following list of dependencies are required to use Tooltip component in your application.

|-- @syncfusion/ej2-angular-popups
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-angular-base
    |-- @syncfusion/ej2-popups
        |-- @syncfusion/ej2-buttons

Setup Angular Environment

You can use Angular CLI to setup your Angular applications. To install Angular CLI use the following command.

npm install -g @angular/cli

Create an Angular Application

Start a new Angular application using below Angular CLI command.

ng new my-app
cd my-app

Adding Syncfusion Tooltip package

All the available Essential JS 2 packages are published in npmjs.com registry.

To install Tooltip component, use the following command.

npm install @syncfusion/ej2-angular-popups --save

The —save will instruct NPM to include the tooltip package inside of the dependencies section of the package.json.

Registering Tooltip Module

  • Import Tooltip module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-popups.
import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

//Syncfusion ej2-angular-popups module
import { TooltipModule } from '@syncfusion/ej2-angular-popups';

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

@NgModule({
  imports:      [ BrowserModule, TooltipModule ], //declaration of TooltipModule module into NgModule
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

Adding CSS Reference

  • Add Tooltip component’s styles as given below in styles.css.

[style.css]

@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-angular-buttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-angular-popups/styles/material.css";

We can also use CRG to generate combined component styles.

Add Tooltip component

Modify the template in app.component.ts file to render the Tooltip component. Add the Angular Tooltip by using <ejs-tooltip> selector in template section of the app.component.ts file.

import { Component, ViewEncapsulation } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `
        <ejs-tooltip id='tooltip' content='Tooltip content'>
            Hover Me
        </ejs-tooltip>`,
  encapsulation: ViewEncapsulation.None
})
export class AppComponent  { }

Run the application

  • Now, run the application in the browser using the following command.
ng serve --open

The following code example depicts the way to initialize Tooltip on a single element.

Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, ViewEncapsulation } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `
    <div id='container' style="display: inline-block; position: relative; left: 50%;top: 100px;transform: translateX(-50%);">
        <ejs-tooltip id='tooltip' content='Tooltip content' target="#target">
            <button ejs-button id="target">Show Tooltip</button>
        </ejs-tooltip>
    </div>`,
  encapsulation: ViewEncapsulation.None
})
export class AppComponent  { }
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { TooltipModule } from '@syncfusion/ej2-angular-popups';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        TooltipModule,
        ButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Initialize Tooltip within a container

It is possible to create Tooltip on multiple targets within a container. To do so, define the selector property with specific target elements - so that the tooltip will be initialized only on those matched targets within a container. In this case, the Tooltip content gets assigned from the title attribute of the target element.

Refer the following code example, to create a Tooltip on multiple targets within a container.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.css
import { Component } from '@angular/core';

@Component({
    selector: 'my-app',
    template: `
        <div id="tool">
          <ejs-tooltip target='.e-info' position='RightCenter'>
            <form id="details" role="form">
              <table>
                <tr>
                    <td class="info">User Name</td>
                    <td>
                        <input type="text" class="e-info" name="firstname" title="Please enter your name"> </td>
                </tr>
                <tr>
                    <td class="info">Email Address</td>
                    <td>
                        <input type="text" class="e-info" name="email" title="Enter a valid email address">
                    </td>
                </tr>
                <tr>
                    <td class="info">Password</td>
                    <td>
                        <input type="password" class="e-info" name="password" title="Be at least 8 characters length">
                    </td>
                </tr>
                <tr>
                    <td class="info">Confirm Password</td>
                    <td>
                        <input type="password" class="e-info" name="Cpwd" title="Re-enter your password">
                    </td>
                </tr>
                <tr>
                    <td><input ejs-button id="sample" class="center" type="submit" value="Submit"></td>
                    <td><input ejs-button id="clear" class="center" type="reset" value="Reset"></td>
                </tr>
              </table>
            </form>
          </ejs-tooltip>
        </div>
        `,
})

export class AppComponent { }
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { TooltipModule } from '@syncfusion/ej2-angular-popups';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        TooltipModule,
        ButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
#loader {
  color: #008cff;
  font-family: 'Helvetica Neue', 'calibiri';
  font-size: 16px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}
#tool {
  width: 500px;
  margin: auto;
 transform: translateX(10%);
}
#details table th,
#details table td {
  padding: 20px 10px;
  text-align: left;
}

#details .info {
  font-size: 14px;
  text-align: left;
  font-weight: 500;
}

.center {
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

In the above sample, details refers to the container’s id, and the target .e-info refers to the target elements available within that container.

See Also

Positioning Tooltip

Tooltip Open Mode

Customize the Tooltip