Ineffective Parsing of Modern JavaScript Syntax in TypeScript to JavaScript Conversion #64
Description
The TypeScript to JavaScript parser struggles with modern syntax, such as optional chaining, leading to suboptimal code generation. For example, when processing the with-auth example in lib/Context.js, selecting JavaScript output instead of TypeScript results in complex and unnecessary code like the _optionalChain function:
function _optionalChain(ops) { let lastAccessLHS = undefined; let value = ops[0]; let i = 1; while (i < ops.length) { const op = ops[i]; const fn = ops[i + 1]; i += 2; if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { return undefined; } if (op === 'access' || op === 'optionalAccess') { lastAccessLHS = value; value = fn(value); } else if (op === 'call' || op === 'optionalCall') { value = fn((...args) => value.call(lastAccessLHS, ...args)); lastAccessLHS = undefined; } } return value; }import { createContext, useContext, } from "solid-js";
import { useLocation, createAsync, useAction } from "@solidjs/router";
import { querySession, logout } from ".";