Glossary term
What is AST (Abstract Syntax Tree)?
AST stands for Abstract Syntax Tree.
The tree the parser builds from your source text before anything runs. Every token becomes a node.
Learn it properly · JavaScript CoreLesson 13: JS Engine and V8 ArchitectureParser, interpreter (Ignition), compiler (TurboFan), memory heap and garbage collection — what the engine does between your file and the CPU. Watch a function climb V8's tiers and fall back on a deopt, and step through mark-and-sweep.