Abstract Syntax Trees: They're Actually Used Everywhere -- But What Are They?

1. estraverse

   1 2 951 0.0 JavaScript

   ECMAScript JS AST traversal functions

   

   Traverse that AST and replace or inject code: Extraverse

2. InfluxDB

   www.influxdata.com featured

   InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

   

3. esprima

   2 9 7,093 0.0 TypeScript

   ECMAScript parsing infrastructure for multipurpose analysis

   

   Create an AST: Esprima

4. escodegen

   3 3 2,683 0.0 JavaScript

   ECMAScript code generator

   

   Unparse the modified AST back into Javascript: Escodegen

5. Visual Studio Code

   4 3,145 173,317 10.0 TypeScript

   Visual Studio Code

   

   Isn't it wonderful how VS Code grays out obsolete lines of code? Oops, my return statement is on line 3. Line 4 won't run... But I haven't called the function yet. So how in the world does VS Code know which lines of code won't be used in the future, when the code finally does run?

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