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Nowadays, when we are engaged in front-end development, the popular MVVM framework is definitely unavoidable. So here are three popular framework Devtools, if you need to pick them up yourself. Vue.js devtools, AngularJS BatarangReact, Developer Tools. This article mainly introduces AngularJS Batarang
How to use the AngularJS Batarang plug-in
For the offline installation method of the AngularJS Batarang plug-in, please refer to the following method: For the old version of chrome browser, first enter [chrome://extensions/] on the tab page to enter the chrome extension, and unzip the content you have on this site Download the plug-in and drag it into the extension page.
2. When the latest version of Chrome browser is directly dragged and dropped to install, "The package is invalid" will appear. CRX-HEADER-INVALID" error message, please refer to Baidu: The solution to "CRX-HEADER-INVALID" appears when installing the Chrome plug-in. You can use it after installation.
3. After the installation is complete, the icon will appear in the plug-in bar.
4. Open an Angular application in the chrome browser and open the console, as shown below, you will find that there is an additional On the AngularJS page, check "Enable" and the control can be used.
5. Click on Models, as shown below. The left side is the information of all Scopes under the application, and the right side is the corresponding Scope. model information. Click on a scope, and all model information in the scope will be displayed on the right. Click "<" before Scope to jump to the DOM tag where the scope is located in Elements.
6.Performace shows the performance of the application. The monitoring tree is displayed on the left. Click on the node of the tree to jump to on the corresponding element element. Shown on the right is the performance of monitoring expressions. This page can help us optimize performance.
7. Dependenices displays the dependencies between instructions and services. Select an instruction to see the services it depends on. . Visualize the dependencies between services through charts. The red lines represent dependencies
8. Finally is the options page. There are three options: "show applications," "show scopes," and "show bindings." When each option is checked, the corresponding content will be highlighted on the page during debugger. 
9. If you have any questions, please check help
10. Select in the Element tag When a certain tag is clicked, the content on the right side of the Element page will have an additional AngularJS Properties page. This page displays the properties of the scope of the selected html content. This function is very useful for understanding Angular Scope. If you don’t understand Angular Scope very well, you can use this function more. 
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