How do you call a JavaScript function from a controller in Salesforce?
You can't call JavaScript from the controller, the page is the output of the controller, rather than dynamically interacting with it. What you can do is set a property in the controller, so that when the page is rendered the javascript executes.
How JavaScript is used in Salesforce?
Using JavaScript in Visualforce Pages Customize the functionality of your Visualforce pages. Pass parameters to the JavaScript, show pop-ups, confirm messages, etc. Display Visualforce page validation messages as pop-ups. Call controller methods from JavaScript.
Can we use JavaScript in Apex class?
You can't execute javascript from apex, Visualforce (and the javascript included in it) is used to render HTML as a result of a page request from your browser.
Is JavaScript needed for Salesforce?
JavaScript has always been available to Salesforce developers, After Lightning Component and Lightning Web Components, it is important language for Salesforce Developer. That means it's time for every Salesforce developer to learn JavaScript.
How do I add JavaScript to Salesforce?
Adding JavaScript to the Page BodyIn the Scripts section of the Properties pane, click Configure in the Edit Body Scripts section.Enter the code in the Edit JavaScript Code dialog box. Don't add