When to use debug mode in Lightning Web Components?

When to use debug mode in Lightning Web Components?

In debug mode the Lightning Web Components engine actually identifies bad patterns that are only detectable during runtime, and then prints them as console warnings. It’s a best practice to develop your Lightning web components in an org using debug mode. That way you see if your code can be even more improved while you develop.

What is the usage of LWC onload behavior?

I have read LWC document and known to use “connectedCallback” to perform Javascript’s onload function. However, it does not perform as expected. I can add classList successfully and retrieve it successfully, too. But, I can not get the element at all! It makes confuses and what are the reasons for the result?

How to debug Lightning in Salesforce web app?

In case you see some behavior that you need to debug, change the property to a function (for @wire) or to a setter (for @api). Then you can debug based on the deconstructed data and error property.

What does this.classlist do in LWC?

In LWC “this” is not a DOM element. It is the LWC’s “controller” object (if you consider it like an Aura component). Doing “this.classList” simply adds a “classList” property to the LWC “controller” instance. What you actually need to look at is the LWC’s “template”.

How to minify Lightning Web Components in chrome?

Every Lightning Web Component JavaScript file that your browser receives from Salesforce in production mode is minified. Without any special setting, you can use the pretty format option in Chrome DevTools (or similar counterpart in your preferred browser) to get some sort of code formatting.

Do you need to enable debug mode in Salesforce?

Enable debug mode to make it easier to debug JavaScript code. Only enable debug mode for users who are actively debugging JavaScript. Salesforce is slower for users who have debug mode enabled. To debug Lightning web components code, use Chrome DevTools.

How can I debug Lightning on my phone?

You can even debug something directly on a phone by setting up remote debugging and navigating to your app’s URL or the /one/one.app URL in your mobile browser. The framework should be run in debug mode so that a readable version of the JavaScript is used.

What kind of logging does Lightning component use?

The Lightning Component bundle controller, helper, and renderer are JavaScript, so you can take advantage of that and use console logging. The easiest type of console logging is to just output some string or value or object. Additionally, there are other console logging methods documented in the Console API.

How to run and debug a component during development?

The simplest way to run and debug a component during development is to create a Lightning Page and add your component to it. Then load the Lightning Page in your preferred browser and use your favorite inspection and debugging tools.

How to debug a property in Salesforce Lightning?

Check out the video at the bottom to see more. A tip on debugging data that you receive via decorated properties (@api or @wire): if you bind the decorator to a property you won’t currently be able to debug it. In case you see some behavior that you need to debug, change the property to a function (for @wire) or to a setter (for @api).