The first few debugging techniques to use are: When you right-click over a point in a page and select Inspect Element, you get the DOM Element shown and the CSS styles that apply shown. This lets you see what HTML/CSS/JavaScript has resulted from your Visualforce.
- Step 1: Prepare Org Data. …
- Step 2: Visualforce Controller. …
- Step 3: Visualforce page. …
- Step 4: Configure Trace Flags. …
- Step 5: Identify a Problem. …
- Step 6: Find Log with Log Manager. …
- Step 7: Use Debug Watches for Exploring Significant Parts of Your Code.
Table of Contents
How do I debug a Visualforce page?
The first few debugging techniques to use are: When you right-click over a point in a page and select Inspect Element, you get the DOM Element shown and the CSS styles that apply shown. This lets you see what HTML/CSS/JavaScript has resulted from your Visualforce.
How do Salesforce Visualforce pages work?
Visualforce pages work like this. The browser makes a request and Salesforce uses Visualforce tags to generate HTML/CSS/JavaScript that is sent back to the browser. Most communication is in a simple text format so can be looked at.
How do I debug my Apex code in Visualforce?
Use checkpoints, logs, and the View State tab to help debug the code you’ve written. Use Developer Console checkpoints to debug your Apex classes and triggers. You can’t set checkpoints in Visualforce markup. Use the Developer Console to overlay diagnostics that run when Apex code executes at a checkpoint, without changing any code.
How can I see what HTML/CSS/JavaScript has resulted from my Visualforce?
When you right-click over a point in a page and select Inspect Element, you get the DOM Element shown and the CSS styles that apply shown. This lets you see what HTML/CSS/JavaScript has resulted from your Visualforce.
How do I query a VF page in Salesforce?
List of visualforce page created by users:Go To Query Editor in Developer Console.Run the below Query. SELECT Name, MasterLabel,namespaceprefix, ApiVersion, CreatedDate FROM ApexPage WHERE namespaceprefix = NULL.Above Query Gives you list of all visualforce page created by users in organization.
How do I use debug mode in Salesforce?
In Salesforce, from Setup, enter Debug Mode in the Quick Find box, then select Debug Mode Users. Click Enable.
How do I display the value of a VF page?
There are two ways by which you can display the values in visual force page. 2nd Approach: You can create an apex class and declare the variables in the class and pass the values to the variables in the constructor and display them in visual force page using getter method.
How do I debug a site in Salesforce?
Set a user-based trace flag on the guest user.From Setup, enter Debug Logs in the Quick Find box, then click Debug Logs.Click New.Set the traced entity type to User.Open the lookup for the Traced Entity Name field, and then find and select your guest user.Assign a debug level to your trace flag.Click Save.
How do I debug JavaScript in Salesforce?
To enable debug mode for users in your org:From Setup, enter Debug Mode in the Quick Find box, then select Debug Mode Users. … In the user list, locate any users who need debug mode enabled. … Enable the selection checkbox next to users for whom you want to enable debug mode.Click Enable.
How do I query debug logs in Salesforce?
Open Developer Console.At the bottom of the console, select the Query Editor tab.Select Use Tooling API.Enter this SOQL query: SELECT Id, StartTime, LogUserId, LogLength, Location FROM ApexLog.Click Execute.Select the logs you want to delete. … Click Delete Row.To confirm the log deletion, click Yes.
How many records can we display in Visualforce page?
It allows the developer to configure list view to display up to 100 records at a time, but by default it returns 20 records on the page.
How do I display notes and attachments in Visualforce page?
The first thing we need to do is enable attachments for our custom object. We will select the “Add Notes and Attachments related list to default page layout” on object creation. This will enable the object to have attachments. We can add as many attachments as we want (or as the Salesforce space limitations allow us).
How do I display a related list in Visualforce page?
The related list to display. This does not need to be on an object’s page layout. To specify this value, use the name of the child relationship to the related object. For example, to display the Contacts related list that would normally display on an account detail page, use list=”Contacts”.
How do I debug Salesforce in Visual Studio code?
In Visual Studio Code, click the View menu then choose Command Palette…. Alternatively, you can use the keyboard shortcut Ctrl+Shift+P (Windows or Linux) or Cmd+Shift+P (macOS) to open the Command Palette. Enter sfdx replay in the search box, then choose SFDX: Turn On Apex Debug Log for Replay Debugger.
How do I view debug logs?
To view a debug log, from Setup, enter Debug Logs in the Quick Find box, then select Debug Logs. Then click View next to the debug log that you want to examine. Click Download to download the log as an XML file. Debug logs have the following limits.
How do I debug Salesforce lightning?
There are a few basic tools and techniques that can help you to debug applications. Use Chrome DevTools to debug your client-side code….DebuggingEnable Debug Mode for Lightning Components. … Disable Caching Setting During Development. … Salesforce Lightning Inspector Chrome Extension. … Log Messages.
How does Visualforce work?
Visualforce pages work like this. The browser makes a request and Salesforce uses Visualforce tags to generate HTML/CSS/JavaScript that is sent back to the browser. Most communication is in a simple text format so can be looked at. The browser builds a DOM (Document Object Model – an in-memory tree) from the response and renders that onto the screen guided by the CSS (for colors, positioning, size etc). Any JavaScript included can then respond to user actions such as mouse clicks to modify the DOM or call back to Salesforce (e.g. to get more data).
How to see errors in JavaScript?
If you then click on the Consoletab, and click on a link or button in the current page, you will see any errors in the execution of any JavaScript. If the new page has JavaScript that responds to user interactions such as clicks, when you do the click you will see any errors in that click handling JavaScript. You can add debug statements to your JavaScript that appear in this console with e.g. console.log(‘index is ‘ + i). If you are adding your own JavaScript, this tab is a huge help.
Does Salesforce need to debug?
If you do not add your own JavaScript or CSS, then you are in safe territory because Salesforce tests their features well and across many browsers, and you should not need to do your own debugging. (An exception is partial page refreshes – via rerenderattributes – that can be awkward to get working.) If you add your own CSS, then what matters is the combination (and priority) of your CSS and Salesforce’s and that can take debugging work to get right. If you add your own JavaScript, then that needs to rely on the HTML that Visualforce generates and fit in with the JavaScript that Visualforce generates. Your Javascript also needs to be valid. Debugging is usually necessary for this case.
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Debug Log Categories
Each debug level includes a debug log level for each of the following log categories. The amount of information logged for each category depends on the log level.
Debug Log Levels
Each debug level includes one of the following log levels for each log category. The levels are listed from lowest to highest. Specific events are logged based on the combination of category and levels. Most events start being logged at the INFO level.
Debug Event Types
The following is an example of what is written to the debug log. The event is USER_DEBUG. The format is timestamp | event identifier: