# Step 4: Step Through The Code
Rashmi Inglekh is a content developer and writer at Codecondo. She loves writing and sharing topics on web development and web programming and latest trends going around in web world. That’s just a small example, you can do a lot more with PhoneGap. Phaser.js offers a massive library of tutorials and examples to follow, and overall it’s just fast and fun to use. Furthermore, it supports Canvas and WebGL rendering, so you can create advanced lighting and other special effects in your games, so they won’t come out looking like retro Nintendo titles .
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The tool also comes with the built-in terminal that allows you to see the command output right from the server. An extensive and highly popular touch-optimized HTML5 UI framework for mobile JS developers, it takes the “write less, do more” approach to mobile web development. It provides a deep API and extensive UI components for creating really amazing mobile web pages, and it can control the entire viewport if you allow it. One of JQM’s most notable features is the Ajax navigation system, which allows for animated page transitions, which just adds a really cool effect to your pages. Gulp is a toolkit to automate tasks using the method of loading source files and data to a build folder before the output.
Inspect CSS GridLearn how to use Chrome DevTools to view and change a page’s CSS. View and change CSSLearn how to use Chrome DevTools to view and change a page’s CSS. There’s a couple of code stepping controls that weren’t explained in this tutorial. While this is set, DevTools ignores any breakpoints you’ve set.
That is, you can start debugging a page with the Console then switch to the Network tab to see network activity without reloading the page. The DOM is a tree of Objects and shows the HTML elements within a hierarchical view. The DOM Tree is available to view within the Inspector panel in Firefox or the Elements panel in Chrome. Remote debugging WebViewsDebug WebViews in your native Android apps using Chrome Developer Tools. View Cache dataHow to view Cache data from the Application panel of Chrome DevTools. View Web SQL dataHow to view Web SQL data from the Application panel of Chrome DevTools.
In the following image, the highlight on the number 18 shows that the line has a breakpoint set. Click a property name or value to bring up a text box, where you can key in a new value to get a live preview of a style change. These items are used to deliver advertising that is more relevant to you and your interests.
- The rules applied to the current element are shown in order of most-to-least-specific.
- This guide will often use the browser console for logging the results of code, and it provides an excellent place to experiment with code, so it’s worth the time to get familiar with it.
- Clicking that rule causes the dev tools to jump to show it in its own view, where it can generally be edited and saved.
Rendering tab overviewDiscover a collection of options that affect web content rendering. Open the Network conditions tab, disable Select automatically, and choose from the list or enter a custom string. Identify potential CSS improvements with the CSS Overview panel. Fix memory problemsLearn how to use Chrome and DevTools to find memory issues that affect page performance, including memory leaks, memory bloat, and frequent garbage collections. Get actionable insights on your website’s performance with the Performance insights panel.
Override geolocationOpen the Sensors tab and select coordinates from the Geolocation list. Debug background servicesHow to debug Background Fetch, Background Sync, Notifications, Push Messages, and view reports with Chrome DevTools. Record heap snapshotsLearn how to record heap snapshots with the Chrome DevTools heap profiler and find memory leaks. Analyze runtime performanceLearn how to evaluate runtime performance in Chrome DevTools. Console Utilities API referenceA reference of convenience functions available in the Chrome DevTools Console.
Exploring The Dom Inspector
Webpack is one the best tools to bundle JS files to be used in a browser and it’s also capable of packaging other assets as well. When it comes to desktop apps, this framework has been gaining traction recently as a fine tool to build cross-platform applications and websites. Electron is based on Node.js and Chromium engine, and supports the whole HTML, JS, CSS pack. Nice examples of apps on Electron are Slack, Docker, Jibo and even GitHub desktop. Get started with viewing and changing the DOMHow to view nodes, search for nodes, edit nodes, reference nodes in the Console, break on node changes, and more. If you look at the code in get-started.js, you can see that the bug is probably somewhere in the updateLabel() function.
# Step 2: Get Familiar With The Sources Panel Ui
Console API referenceUse the Console API to write messages to the Console. Inspect and Debug CSS Flexbox LayoutsLearn how to use Chrome DevTools to inspect, modify and debug CSS flexbox layouts. Keyboard shortcutsThe canonical documentation for Chrome DevTools keyboard shortcuts. If you don’t have the Console drawer open, press Escape to open it. To the left of the code you can see the line number of this particular line of code, which is 32.