Not always the case, but generally speaking it seems to be for me. I tend to need what’s at the top or at the very bottom, and the in-between is typically filled with a lot of innocuous stuff that I don’t care about. The stack traces can be quite large, but they run in order of the last (most nested) call on top, and the origination point at the bottom of the stack. is this method being called from where I think it is? Maybe an event you think is being called from one place is being called from another place as well rather than add a trail of console.log statements you can stick a breakpoint at the line in question and see if it’s being called multiple times and what’s calling it. This can be a particularly useful tool when you’re perhaps trying to trace the origin of a request, i.e. Last but not least, the feature I want to specifically point out is the “Call Stack” tab in the right panel. Locally defined variables actually display their values inline as you can see, x is 25 at this iteration of the loop when the breakpoint kicked in. Let’s give it a shot and see if it works. In the image above I’ve specified that I want the breakpoint to become active only when x = 25.
As you can see on the right of the image, the dev tools have notified me a source map was detected - we’re looking good so far! Next add the folder with your javascript application, in my case that was resources/js.
#Enable java script debugger plus#
Click the “Filesystem” tab next to the “Page” tab and then click the plus icon to add some local source code. The bult-in debugger starts automatically when you launch a debugging session. IntelliJ IDEA provides a built-in debugger for your client-side JavaScript code.
#Enable java script debugger code#
The next step is to add your project source. Debugging of JavaScript code is only supported in Google Chrome and in other Chromium-based browsers. See here for more information if you are having trouble enabling source maps. There are a lot of ways different frameworks provide source mapping, but since we are using Vue.js it should be enabled by default for development. Typically the build process for Vue.js and other frameworks is to “compile” javascript into a combined minified file, which makes it hard to read and set breakpoints when all of the line breaks are removed and variable names possibly obfuscated.
Source mapping allows you to connect javascript code executed on the page to un-minified source files on your local hard drive. But the real power of this tool is realized through the use of source mapping. These in themselves are moderately useful - if for example you only have access to the live site and not the source code - and in some cases, without a source map you might be forced to use them. I can find many pages specifically, even within MS 'official' instructions that name Win10 and MS Edge, but still refer to the parameters of Explorer. Thats what i do for sites that cause those errors.
From there go to the debugger tab and pause the debugger. Already you probably see some folders and files available in the “Page” tab of the Sources tab. In Edge if you hit the F12 key that will bring up the dev screen.