Assume we’re using v1.15.2 of the SharePoint Framework Yeoman generator.
Open a command prompt and change to the folder where we want to create the project.
Run the SharePoint Yeoman generator by executing the following command:
yo @microsoft/sharepoint
Use the following to complete the prompt that is displayed:
What is your solution name?: HelloWorld
Which type of client-side component to create?: WebPart
What is your Web part name?: HelloWorld
Which template would you like to use?: No framework
After the generator scaffolds the folders required for the project, the generator will install all the dependency packages using npm.
When npm completes downloading all dependencies, ensure the developer certificate is installed by executing the following command:
gulp trust-dev-cert
Run the project by executing the following command:
gulp serve –nobrowser
The SharePoint Framework’s gulp serve task with the nobrowser switch will build the project and start a local web server. Wait for the reload subtask to finish executing. At this point, the web part will be ready for testing.
Open a browser and navigate to any SharePoint site in your tenant. If prompted, sign in using your Work or School credentials. Append the following to the end of the site’s URL: /_layouts/workbench.aspx. This is the SharePoint-hosted workbench.
Select the web part icon button to open the list of available web parts, scroll down to the Advanced section, and select the HelloWorld web part:
Edit the web part’s properties by selecting the pencil (edit) icon in the toolbar to the left of the web part:
In the property pane that opens, change the value of the Description Field. Notice how the web part updates as you make changes to the text:
Update the web part code
Open the project folder in Visual Studio Code.
If the local web server isn’t running, start it by running gulp serve –nobrowser on the command line from the root folder of the project, and add the HelloWorld web part to the SharePoint Workbench.
Next, update the code in the render() method to add a button that responds to an event.
Locate and open the file src/webparts/helloWorld/HelloWorldWebPart.ts.
Within this file, locate the render() method. Locate the following lines:
<h4>Learn more about SPFx development:</h4>
<ul class="${styles.links}">
<li><a href="https://aka.ms/spfx" target="_blank">SharePoint Framework Overview</a></li>
<li><a href="https://aka.ms/spfx-yeoman-graph" target="_blank">Use Microsoft Graph in your solution</a></li>
<li><a href="https://aka.ms/spfx-yeoman-teams" target="_blank">Build for Microsoft Teams using SharePoint Framework</a></li>
<li><a href="https://aka.ms/spfx-yeoman-viva" target="_blank">Build for Microsoft Viva Connections using SharePoint Framework</a></li>
<li><a href="https://aka.ms/spfx-yeoman-store" target="_blank">Publish SharePoint Framework applications to the marketplace</a></li>
<li><a href="https://aka.ms/spfx-yeoman-api" target="_blank">SharePoint Framework API reference</a></li>
<li><a href="https://aka.ms/m365pnp" target="_blank">Microsoft 365 Developer Community</a></li>
</ul>
Replace them with the following:
<button type="button">Show welcome message</button>
Next, add the following code to the end of the render() method. This will wire up some code to the click event on the button and display an alert on the page.
this.domElement.getElementsByTagName("button")[0]
.addEventListener('click', (event: MouseEvent) => {
event.preventDefault();
alert('Welcome to the SharePoint Framework!');
});
Save your changes. Wait a few seconds for the gulp serve task to rebuild your project, and then refresh the SharePoint Workbench so that you can test them.
Select the Show welcome message button.
Notice the button triggers a JavaScript alert displaying the message you added in the above code.
Close the browser and stop the local web server by pressing CTRL+C in the command prompt.
Update the web part’s properties
Now change the properties of the web part to give it a new name, description, and icon.
The web part’s metadata is found in its manifest file.
Locate and open the file src/webparts/helloWorld/HelloWorldWebPart.manifest.json.
In the section preconfiguredEntries, locate the following lines:
JSONCopy
"preconfiguredEntries": [{
...
"title": { "default": "HelloWorld" },
"description": { "default": "HelloWorld description" },
"officeFabricIconFontName": "Page",
...
}]
Change the web part’s title and description to something different.
The web part’s icon is the name of one of the icons listed in the Office UI Fabric, located here: https://developer.microsoft.com/fabric#/styles/icons. Pick one and update the officeFabricIconFontName property:
JSONCopy
"preconfiguredEntries": [{
...
"title": { "default": "Hello SPFx" },
"description": { "default": "My first SPFx web part" },
"officeFabricIconFontName": "BirthdayCake",
...
}]
Start the local web server using the provided gulp serve task with the nobrowser switch:
ConsoleCopy
gulp serve --nobrowser
Wait for the reload subtask to finish executing, then open or refresh the SharePoint Workbench. This time, when you hover the mouse over the web part in the toolbox, you’ll see the changes you applied to your web part:
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