Optionalrange: [number, number]Optionalloc: SourceLocationOptionallocThe loc field represents the source location information of the node.
If the node contains no information about the source location,
the field is null or undefined;
otherwise it is an object consisting of
a start position (the position of the first character of the parsed source region)
and an end position (the position of the first character after the parsed source region):
and offset index (the position of the first character)
ProtectednameOptionalrangestart and end position offset
The type field is a string representing the AST variant type.
Each subtype of Node is documented below with the specific string of its type field.
You can use this field to determine which interface a node implements.
declare variable in the current local scope (block), or closest function scope (global) scop, the propertyName will be calculated at runtime
the stack which an identifier will be declared
the initial value of identifier
get all dependencies form an expression node
the return from this method, is represent an answer for what identifiers this expression depends-on.
ex:
x + y;
+ operator : the answer should be lhs and rhs,x identifier: the answer should be node x,y identifier: the answer should be node y.so, the return from + will be [ node 'x', node 'y']
and:
x.y.z * a ==> [ member node x.y.z, identifier 'a']Optionalcomputed: trueex:
x + y;
+ operator : the answer should be lhs and rhs,x identifier: the answer should be node x,y identifier: the answer should be node y.so, the return from + will be ['x', 'y']
and:
x.y.z ==> ['x', 'y', 'z']x[y].z ==> ['x', ]Optionalcomputed: truerequired for member and chaining operators
get all the events form this expression
the return from this method, is represent an answer for what is this expression depends-on as identifier name
ex:
x + y;
+ operator : the answer should be lhs and rhs,x identifier: the answer should be xy identifier: the answer should be y
the final output will beso, the return from + will be { x: undefined, y: undefined }
and:
x.y.z * a ==> { x: { y: { z: undefined }, a: undefined } }x.y.z > x.y.h.g ==> { x: { y: { z: undefined, h: { g: undefined} } } }x[Symbol.toStringTag] + 'Class' + classType + array[3] ==> { x: { 'Symbol.toStringTag': undefined }, classType: undefined, array: { 3: undefined } }'name' ==> {}
user[firstName + son of ${fatherName}]
``` ==> { user: { 'firstName:fatherName': undefined }, firstName: undefined, fatherName: undefined }
just a helper method to force class that implement this interface to
have a static method fromJSON to help reconstruct this ExpressionNode
from an ESTree json object,
with all necessary implementation to execute the code
used to map this object to represent an ESTree json object
Optionalkey: stringStaticfromJSON
An identifier is a sequence of characters in the code that identifies a variable, function, or property. In JavaScript, identifiers are case-sensitive and can contain Unicode letters, $, _, and digits (0-9), but may not start with a digit. An identifier differs from a string in that a string is data, while an identifier is part of the code. In JavaScript, there is no way to convert identifiers to strings, but sometimes it is possible to parse strings into identifiers.